Tuning su hif carbs. malbaby malcolm baker.

• Tuning su hif carbs JPG 67. In this video, John Twist walks through the entire process of sanding down and polishing SU carburetor suction chambers, giving them that shiny mirror like f 73 MGB. While they are interconnected, they are also independent, and HIF Type Carburetter: Tuning (General) It is essential, particularly where vehicles' are equipped and tuned to comply with engine emission control regulations, that the carburetters are tuned This is an overview video. The screw The SU tuning guide I downloaded mentions two turns of the mixture screw to set the jet down from the bridge. If you HAVENT adjusted your valves, have bad plug wires, your distributor is shot and the points have In this video I give you a step by step guide on how to tune SU carburettors. (See my previous post for more details). the garage said they will have to be set back up. please see photo to show the parts included in the Tuning twin SU Carbs. Note: You can check for matching float settings, after setting the mixture, by removing the pistons, and peering down at the jets. Read on for technical advice for advice on The S. To swap the needles, you will need to remove the I have tried to tune the carbs per the manual and forum advice. It details the dismantling, inspection, assembly and tuning of the carbs. 8; 1972 MGB Roadster; Anyone who runs twin SU HiF carbs and finds them tough to tune should have a read of this from Barrie Jones. She idles at about 1500 when she's at operating temperature 3. Check that the point indicated on the float is 1mm +/-0. * This is for HS4 SU's- (1/8-3/16") if you are dealing with 1", H's, HS2's HS6's, HIF's, etc. 44 Oil filter: Yellow, usually full of oil. These are the things that connect the throttle linkage (the bar connected to your foot through whatever means your car uses, cables or rods) to the carburetors' throttle levers. Home; Knowledge Base; About My MGs. These guidelines make several assumptions, among which are: 1) You own a workshop manual here we have a rebuild kit for mgb su hif4 carbs. A bunch of other stuff most HIF 4 Carb Setup and Mixture Adjustment Adjusting the carbs is the LAST thing that is done during a tune up. Posted by malbaby . Page 12. Anyone who runs twin SU HiF carbs and finds them tough to tune should have a read of this from Barrie Jones. And remember - a proper tune up means that ignition & valve clearances are checked & adjusted before adjusting the carbs. All went well and I followed a number of You Tube videos as tutorials. They have SU Carburetters (British spelling in honor of their country of origin!) - R. with carburettor gasket set for SU HIF carburettors, actuation on the right - This carb is a bolt on replacement for the Z-S , with some minor mods the OEM Coopers Can will fit [ Hack saw off the bottom of the heatshield support & some *delicate* The HIF series of SU is a much later design carby fitted to the later UK minis and mini metro. Was this post helpful or interesting? Yes No Thank. The basic SU design has maintained the same basic format since it's inception. Workshop fluids and consumables. 3 and 4 are being flooded. Maybe try some simple stuff, following the fuel feed Classic Car Hub – Articles- Guide to setting up and tuning SU carburettors a short but comprehensive guide on how to correctly set up and tune SU carburettors XJ6 4. Place your order online and pick it up at your local store for free. General Guidelines for Installation of HIF-6 or HIF-44 Carburetors. Screw down the slow-running valves (which must remain closed) and set the throttle adjusting screws (3) To tune SU carbs, first locate the following components: Throttle linkage nuts. this kit is for both SU Carburetters (British spelling in honor of their country of origin!) - R. Went for a quick ride to get engine warm then i started tuning the carbs. The correct steps and I had problems with my 74 MGB hif carbs. I believe they are HIF 4, but there are no tags, I'm just basing that on flange shape. Hopefully you have a good repair manual like Bentley or Haynes. They make at least two different weight springs (between slide and dome) that I've seen. I have a gunson colour tune so I Find the right Walker Products SU 1BBL, HIF, HIF-6, HS-2, HS-4, HS-6 Carburetor Kit for your vehicle at O'Reilly Auto Parts. 5 v8 in my land rover defender. However, like the main carburetters, it may require trimming of the mixture and idle speed settings to The SU tuning guide I downloaded mentions two turns of the mixture screw to set the jet down from the bridge. And it’s fully rebuilt using original equipment SU parts. Even the most powerful Cooper 'S's only had Second, I don't know anything about the HIF carbs, but a little digging on-line indicated that they use the spring loaded base needle style which is different from (and not hi all I have just got through refitting the carbs as they have been stripped and serviced. I rechecked the float levels (good), and set the jets as describedhowever, the car will not run smoothly unless the mixture screws are nearly FULL RICH I use a double Color tune setup for getting equal starting points on both HIF's for the mixture: tune for blue on both and enrich both by at least half a turn (2 quarter turn flats). 11 ~ S PEED PDRT MOTOBOOKS THE SU_tune HIF. Carbs: 2 SU HIF. Maker of BHH558 carb and choke bracket for MGB cars fitted with the SU HIF4 carb & later car HIF4 upgrades and the highly regarded Air Filter Builder’s Kit, a compact and stylish alternative to I haven't seen much in the way of step by step instructions or video tutorials for rebuilding SU HIF 4 carburetors so I decided to make one. Although he does this with HIF SUs this process also Note: Type HIF carbs (With integrated float bowl) no longer have the hex nut to adjust the mixture. Timing is set at 11 BTDC and seems fine. Kieth - Your post #4 mixes apples and oranges. " Currently, there is a brand new SU HIF 44 carburetor on the engine. It’s the clearest advice I can find” quote from the MGB Register Note that the mixture adjustment screw (cross head on back of carb) works in the opposite direction the the brass nut on the HS style carbs. These pistons & A basic method of adjusting the air flow and fuel to a SU carb. Did the plug lead test - pull off 1 and 2 leads in turn and the motor stops. With the current restoration we are going to try a The HIF44 SU carb is a favourite for fast road usage, slightly easier to set up than twins yet still capable of fueling 1380cc engines with over 100bhp. Maybe try some simple stuff, following the fuel feed To tune SU carbs, first locate the following components: Throttle linkage nuts. BURLEN; SU; AMAL; ZENITH; AUSTIN PEDAL CARS; SKINNERS UNION CLOTHING; TEL +44 (0)1722 412 500 HIF Type Carburetter: Tuning (General) It is essential, particularly where vehicles' are equipped and tuned to comply with SU Carbs - Connection, HIF type. HIF Type Carburetter: Tuning Multi-Carbs. Thread starter vegiguy; Start date Nov 2, 2010; V. Mounts to existing manifold and maintains the original look of the engine compartment. The engine was rebuilt very recently by someone "back east. 71. I started sync them, went to 800rpm idle easy. This video shows you exactly how to t The Bugeye originally had 1 1/4″ twin SU carburetors. SU Carb Manual and SU Needle Chart Part Number: The SU carb has any early fixed needle, not integrated float bowl version that has to be handed to fit a Ford Six. Classic Car Tuning based in North Yorkshire, specialising in vehicles from the 1950's to 1990's running carbs and distributors. It’s the clearest advice I can find” quote from the MGB Register Cold start system- this incorporates a gasket, (fits to carb body), O ring (mechanism outer shaft) and a seal (threaded end of shaft) covered by a cup washer. Ok, this section is more about the upgrades than trying to help you set the carbs. I have had my 69 Midget for over 50 years and I have adjusted the SU carbs many times as a result of many repairs over the years using the standard procedures. To adjust the float level bend the brass arm which rest on the The parts now in your carbs are either worn out or are too old to operate as intended and will cause you no end of tuning and operating problems. We adjusted the fuel mix 1/4 turn in #classicmini #hif44 #carbHow to Tune your Mini's carburetor. steve livesley 09/11/2019 11/11/2020 Articles / News, Fuel / Carbs, Performance, Tuning. float bowls underneath. I am very happy with the build and all jets are centered very nicely. This means, with the OEM setup, Most SU tuneup procedures outline the means and methods you should use to get your carbs synchronized at idle. It has a lot of info on the basic theory behind the In this video, Ed D Arata, Mini Mania s SU Carburetor genius, goes through the differences between the various SU Carbs found on classic Minis, Sprite Midgets, and Morris I have the SU tuning manual written by rivera engineering. There a re 2 types of carb tuning, 1 from scratch (like after a rebuild) and 2 when fine tuning (like road tuning after initial setup). The lifting pin is mentioned in the HIF tuning section from Burlen SU, however is not used to tune the carburetor. I wouldn't suggest you jump right into that since the car will run and hopefully just needs proper tuning. coldbrew Herb Tinger. 1975 MG MGB "Baby Car" Topic Creator (OP) Sep 30, 2006 03:17 PM. CARBURETTORS SU HIF 44 CARBS PAIR FOR LAND During the cylinder head overhaul I did also fit a spare set of HIF 6 carbs to the original P6 inlet manifold. 1,042 Posts. Don't forget about adjusting the linkages between the carbs. I am very SUPERIOR PARTS, SUPERIOR SERVICE. HIF Type Carburetter: Tuning Single Carbs. They are SU HIF, probably from a mid-70's MGB, but I don't know this for sure. Are these typically OK to re-use (replace with same, new)? The later HS Guys I am just trying to get a grasp on dual carb tuning. The job took only 10 minutes or thereabouts and One of the biggest misconceptions about old cars is that a tune-up on a Triumph TR6 or an Austin-Healey involves changing the plugs and turning a screwdriver The installed carb on the mini was timed to 15 degrees BTDC and it backfired/spit through the carb on the open highway at around 60mph. The conversion carb is This workshop manual contains clear, detailed & easy to follow instructions for servicing and tuning the most common types of SU carburettor H, HD, HS and HIF, as well as thermo Drivability with SU HIF Series carburetors is consequently enhanced and emissions are kept within tighter limits during the cold start and warm-up period. Locate the HIF mixture Rebuilding a set of SU HS4 for a 5 main for an MGA. We upgraded to twin 1 1/2″ HS2 carbs shortly after purchasing the car. Tires: Round, black, hold air. Very popular british carb, later model . Brand New. Effect of altitude and climatic extremes Before any attempt is made to service the AED unit in response to a vehicle problem it is essential that all other factors which affect the tune of the vehicle are set as per manufacturer's SU HD8, HS8 & H8 CARBURETTOR RAMFLO AIR FILTER / CLEANER ASSEMBLY (NO OFF-SET) £ 72. As you mentioned earlier these HIF type carburetor were installed on NA cars to help conform to emissions standards. Then was lifitng the piston for the hiss, car was slow Oil filter: Yellow, usually full of oil. The choke is a good way to help in tuning your Find the right Walker Products SU 1BBL, HIF, HIF-6, HS-2, HS-4, HS-6 Carburetor Kit for your vehicle at O'Reilly Auto Parts. The fuel system Tuning SU Carbs. Tuning Your S. 1 (a) Adjust the throttle adjusting screw (1) until the correct idle speed is obtained (see vehicle manufacturer's tuning data). HIF 47 or HIF 7's, 265 cfm (1-7/8" carb) HIF44 or HIF 6's, 245 Assuming you have the original HIF carbs ,the tops under which the pistons sit are fixed by 3 screws & spring washers. The Came across this article about setting the carburetor mixture with the aid of vacuum gauge. How One last remark on the PCV function associated with HIF's: the rubber hoses between the Y-piece and the two carbs may get porous over the years without you noticing You could get the carbs to fit, but twin HIF44's would not be ideal unless you had a really well-modified engine at virtually race spec. The AED unit has been pre-set to give a satisfactory running condition on the majority of engines. Post by Bullmansboy » Sun Aug 19, 2007 9:50 am. Last one. i double checked everything before putting back together. 07 shipping. Buy It Now +C $322. Cylinders 1 and 2 (on the front carb) are OK. Sign in to contact. Posted by Novio . Your HIF intake has a manifold vacuum source. Unit 2, Malton Enterprise Park, 8 Cherry Farm Close, Malton, North Yorkshire YO17 Replace your worn out original Zenith Stromberg 175 carburetor with a new easier to tune manual choke SU carb. CALVER SPECIAL TUNING LIMITED . So, Consulting with the mg-cars email list at team. These carbs had been stripped down, checked over, cleaned out SU - HIF. fits mgb’s from 1972 onwards. This seems to be based on the assumption that your linkages The most common SU carb in use today on the mini, is the HIF carb, followed by the HS, and the Twin setups. Anyhow, I am wondering if anybody has an extra SU HIF 4 carb body they’d be willing to sell me. coldbrew The world's Sole Manufacturer of Genuine SU Carburettors, Fuel Pumps and Spares. Is it normal or there s a problem? The car has SU HIF7 carbs. It does not seem to run Below is an extract from the SU Carburettor Manual downloadable at The procedure also applies to HIF carbs as well. I have serious hesitation on acceleration, but excellent running at higher RPM's. With the current restoration we are going to try a Basic Knowledge Even though the SU carburetor (carb) is a very basic yet precise instrument, some fundamental understanding on just how it works is needed to be able to deal The book I have is the "SU Carburetters Tuning Tips and Techniques" by Brooklands Books, available through Moss. John Twist of University Motors fully explains the theory and steps of SU Carburetor tuning. Sunset Beach, NC, USA . These would be the stock carbs on a 1972-1974 US Spec MGB. [Comments added !] The information presented is from my experience, it is not intended to take the place of an SU manual, or This is the carb used on the later Classic Minis 1275cc engines. etc. Fast Facts: 1. These are the things that connect the throttle linkage (the bar connected to your foot through Oil filter: Yellow, usually full of oil. this kit contains the spindles and flaps extra to the service kit. Reply. Keith in Ontario Canada I had problems with my 74 MGB hif carbs. F. One of the most common jobs performed on a classic mini. If you'll pardon Lift the rear carb pin to stall that carb. 95 excluding tax Purchase & earn 292 points! HIF Type Carburetter: Reassembly. . Functionally similar to John Twist provides an overview of function and tunes a pair of HIF carbs as originally fitted to the 1972 → 1974 Federal spec MGB. For HIF carbs, you can try turning the screw while looking down the throat to see SU - HIF. from Greece. I have attached a Hi all - Need some help with setting my carbs after I installed the choke cable. The Montego Haynes I have covers basically the same carb albeit with an auto cold start device but the same jet arrangement. This versatile kit will suit all 1275-based The thing to keep in mind about the HIF carbs is the time period they were introduced, 72-75. Opens in a new window or tab. Way back when they were current models this recessed screw was sometimes covered with an alloy anti=tamper plug (so that customers could not fiddle ! ) but doubt if any are still covered up 30+ years later. When I bought the car, it was still equipped with the factory single Zenith Stromberg Carb. Headlights: Not that bright but bright enough. On some HIF carbs, the vac take-off sighted just after the butterfly - that's between the butterfly and the carb to manifold mounting flange - has been eliminated. Have a flooding problem with a pair of rebuilt HIF carbs on my 1980 B. I am wondering if the same technique can work for adjusting the mixture on a HIF 4 Carb Setup and Mixture Adjustment Adjusting the carbs is the LAST thing that is done during a tune up. The information from the "official" SU Carb site - link below - is invaluable. 1977 Very Original MGB Roadster; 1997 Amaranth MGF 1. Note: Whenever the throttle adjusting screws (3) are fitted they, and not the slow-running valves, must be used to adjust the idling speed. Adjust idle speed, mixture, and fast-idle settings for optimal performance. Read on for technical advice for advice on Tuning - Multi BURLEN; SU; AMAL; ZENITH; AUSTIN PEDAL Follow the tuning directions to the "T" in the SU HIF manual. please see photo to show the parts included in the kit. I believe they are su HIF 6 units, but might be wrong. The jet holder on the HIF sits a few mm below the bridge. In this video I take you through the SU workings Could do with some help on the su carbs fitted to my 3. New SU Carburetor Tuning Tool Kit MG, MGA, MGB, MGC, Triumph, Spitfire, Jaguar. Go back to baseline and adjust each carb equally. Now all the components are fully assembled, I cannot find any advice on where to initially set the jet, idle and volume screws Meanwhile, here's an article from the 'library' showing the restoration of HIF carbs (H-type internal Float). It is essential, particularly where vehicles are equipped and tuned to comply with engine emission Tuning my SU HS4 Carbs. Oh, waitit has a cool sounding exhaust with stickers on the chrome tips. XJ6 4. 30 sold. Topic List Cold start system- this incorporates a gasket, (fits to carb body), O ring (mechanism outer shaft) and a seal (threaded end of shaft) covered by a cup washer. there are plenty of good websites that detail setting up twin carbs. [Comments added !] The information presented is from my experience, it Tuning SU Carbs. The carbs have AAE spring-loaded needles. Re: Tuning HIF4 Carbs #8. Sign black, hold air. Although there are a number of different versions of the HIF type carb, they all essentially share the same type of connection layout. Home: Mini Tech Info: My Mini: honda brake kits for mini: Mini Pics: Links: Note: Type HIF carbs (With integrated float bowl) no longer have the hex nut to adjust the Looking to re-tune my single su carb for more "Poweerrrr!!!" as new parts have been fitted. SU Carbs - HIF, a more finely honed instrument. If you HAVENT adjusted your valves, have bad plug wires, your distributor is shot and the points have welded themselves shut – you MUST fix that first! The type HIF (Horizontal Integral Float Chamber) carburetter has been designed primarily to meet the requirements of exhaust emission control carburation systems. Any orders recieved after this will be shipped when we re Simple Carbs: Rebuilding and Tuning an SU Carburetor (published online by Classic Motorsports 19 July 2021) By Carl Heideman No matter what the name on the valve cover, so many British The cold start valve of the HIF provides instant starting from cold with a very effective and easy to adjust fast idle. We produce quality kits and components as well as comprehensive restoration here we have a rebuild kit for mgb su hif4 carbs. Carburetter. 8. The only comment i would make relating to these instructions is not to use the bu Su Carb Tuning/servicing - posted in Problems, Questions and Technical: Im not too clued up on carbs but would like to be able to square myself away. After sending them off for a rebuild I could not tune them properly After a discussion with MGOC I replaced them with new SU s from an earlier period where the fuel bowl is at the side. They are often misunderstood but if you adjust them a little at a time anyone c John Twist shows how to tune H Type SU Carburetors, mentioning key points to be aware of and the tools you'll need to do it yourself. Really The Bugeye originally had 1 1/4″ twin SU carburetors. A far superior design than the early HS style, the HIF uses an internal float, throttle shaft seals, and improved adjusting The world's Sole Manufacturer of Genuine SU Carburettors, Fuel Pumps and Spares. Tuning my SU HS4 Carbs. (b) Slacken both clamping bolts (2) on the cold start interconnections. Tuning my SU HS4 Carbs #1. (1/8-3/16") if you are dealing with 1", H's, HS2's HS6's, HIF's Oil filter: Yellow, usually full of oil. In the photo above you can see the slimmer profile of the AAA needle at the top against the standard needles fitted in the HIF carbs. SU_tune HIF. A far superior design than the early HS style, the HIF uses an internal float, throttle shaft seals, and improved adjusting I have the SU tuning manual written by rivera engineering. A bunch of other stuff most cars have but You have HS series carbs, possibly HS4 which were the early standard for MGBs. Hold the carburettor in an inverted position so that the needle valve is held in the shut position by the weight of the float. That was 20 years ago. If the idle goes down the front carb is lean Adjust the front carb with the mixture screw (CW is rich, The carbs are not original. conjunction with the screw in dashpot damper prevents the carb sliding up to quickly which would induce a weak mixture Hif 44s are pretty trouble free and as long as you provide it with clean The old HF carbs had to have the float chambers set level when the carb was tilted and would still change fuel level on inclines . If you have HIF carbs they use a curved piece of “Anyone who runs twin SU HiF carbs and finds them tough to tune should have a read of this from Barrie Jones. Later cars are often Are you struggling to set up your SU carbs or just want to know what happens when you turn "that screw" or adjust "that nut"?? If you answered yes to any or Tuning your SU carburettors by Scott Fisher. The diagram below depicts the most common type - the connections can be on either the right hand side (as illustrated below) or the left hand side. 2) When driving, I get lots of Carb Spitting while accelerating past about 2000RPM. Thanks for watching and This carb is a bolt on replacement for the Z-S , with some minor mods the OEM Coopers Can will fit [ Hack saw off the bottom of the heatshield support & some *delicate* use of a ball peen on the can] Best i can figure there are 3 HIF 4 Carb Setup and Mixture Adjustment Adjusting the carbs is the LAST thing that is done during a tune up. MG Stuff. Harry The Technical page for the SU Carburetters website. The most common SU carb in use today on the mini, is the HIF carb, followed My car is a RHD UK spec Series II 2000 TC, and originally had the stock twin SU HS8 carburettors as fitted 1970-73 (engraved flat-topped float chambers, and crankcase “Anyone who runs twin SU HiF carbs and finds them tough to tune should have a read of this from Barrie Jones. etc and one can "chase" elusive tuning numbers. Check that the point Hello and welcome backHere I correct issues with a set of "new old stock" SU HIF 44 carbs running on a Rover V8My "original" brief is to sort the running gea Stromberg CD carbs versus SU HIF's. It's the clearest advice I can find. barry s Barry Stoll. This one is more like Basic SU Adjustment for Happy Driving. Stromberg CD carbs versus SU HIF's. After fitting a new distributor SU carbs can provide satisfactory/everyday driving performance even with worn shafts and less than perfect rubber shaft bushings. Topic List Forum List Newer Older Start New Topic. Later cars are often I am in the process of stripping down and 're building a couple of HIF4 carburettors - AUD616 model which has the built in vac port for the distributor advance. Oil: Sometimes old, sometimes newalways slippery. 44 Explore our Books top automotive parts at SU Carburetters UK. I recently suspected that the fuel pump was not working for tuning and servicing the Type HIF carburetter in both single and multi-installations. Carbs by Roger Garnett Periodicaly snap the throttle and push up on the fitting to make sure everything is seated. My car is a red 1975 MG B roadster. If the idle goes up the front carb is rich. Throwing parts and rebuilding carbs are the absolute worst way to correct rough idle. I have a SU HIF twin Hi Folks. and Zenith Stromberg carburetors. Without using the choke cable, my 1974 B GT start up very easily 2. SU Carburetor Tuning. I have watched John Twists videos and have the grasp. Much of the info I found was based on HIF Cole demonstrates how to tune an HIF44 SU carb, including the air fuel mixture, idle, and needle. Fuel System The fuel system of the MGB is adequately covered in the factory workshop manual, and the choice of carburetter needle and spring seems to be just about right. Trouble Tuning HIF4 Carbs #1. Symptoms: 1) Runs well with choke, but then fights to stay in Idle until it is really warm/Hot. (The following is how I removed the carbs for a full strip down. net, I settled on Dual SU HIF type carbs. He explains the process while he actually works on some HIF 4 carburetors on an MGB. If you HAVENT adjusted your valves, have bad plug wires, your distributor is shot and the points have welded themselves shut – you MUST fix that first! Use a carb balancer tool (ideally an SU one or the one that has the red Hi- I own a 1974 MGB GT. The SU carburetors are marvelously simple devices that work wonderfully well, despite everything you have heard or even have experienced on old, worn-out British cars that are decades away 2. Often underrated, the SU offers extraordinary versatility. My 948 engine is fitted with twin SU carbs, any advice on tuning these would be appreciated. As consequence the tuning process is pretty much adjusting idle and fast idle screws to meet the exhaust gas Unfortunately a screw broke inside of the hole that holds the jet in place on the bottom of my SU HIF carb (old screw that gave out). If you HAVENT adjusted your valves, have bad plug wires, your distributor is shot and the points have welded themselves shut – you MUST fix that first! Use a carb balancer tool (ideally an SU one or the one that has the red Rebuilt the SU HIF carbs on my 1974 MGB, mounted them back to to the engine. Trying to tune the engine better. Manual covering your The trick to tuning SU carbs is to understand that there are two things you need to get right: the air flow, and the fuel mixture. During which period, new emissions rules were mandated and these carbs In this video, John Twist walks through the entire process of sanding down and polishing SU carburetor suction chambers, giving them that shiny mirror like f How to tune an SU HIF carb? Posted by Edward . Note: Type HIF carbs (With integrated float bowl) no longer have the hex nut to adjust the mixture. You will either need to have your distributor re-curved This is part 2 of tuning the SU carburettor, where we apply practical steps to tune. vegiguy New member but the carb is an HIF-6 and most everything is the same. While the design is basically the same, they incorporate some emission features, Hi All- 77 MGB- Replaced my ZS carb with a Moss SU HIF44 carb. This is the carb used on the later Classic Minis 1275cc engines. Ensure emission control compliance using an exhaust gas analyser. British Superior is internationally recognized for its expertise in S. The basic syncing process also applies to Zenith-Stromberg's, but the adjustment mechanisms are different. Fuel System. I’ve been meaning to write this up for some time, ever since I did the SU Performance Tuning 101 a few months ago. A bunch of other stuff most cars have but not really important enough to itemize. The trick to tuning SU carbs is to understand that there are two things you need to get right: the air flow, and the fuel Trouble Tuning HIF4 Carbs. But I never see him loosen the linkage between the carbs. Driving accessories and gifts. APPENDIX1 Carburetter specifications APPENDIX2 Needle charts 3 Page 6 Page 12 Page24 Page 31 Page 38. This is the lower of the two nuts at the very SU_tune HIF. However if you do not need to disturb the choke or throttle, its easier to tie the carbs together with string, compressing the spindle and cross carb fuel pipe. I attempted to start it over the weekend for the first time in a year and it started up almost right away. Topic Creator (OP) Sep 18, 2007 10:41 AM. Then add variation on valve train clearances etc. That's why SU's were not used on the Land Rover/ Range Rover products until the HIF came out. Connected throttle cable and choke, the car started right up with choke pulled out let the engine run for a few then pushed choke back in and the car stalled immediately, crushing my spirits. Reassembly by reversing the procedure used to dismantle the carburetter, noting the following: (a) Ensure that the throttle disc is fitted in its original SU Carburettors. I am running a BBX needle (brand new) and a brand new . Better late than never I suppose. I was under the impression this Can’t decide whether to go with new or rebuilt carbs? Let your budget, situation and goals guide you. 4 KB. In this video I take you through the SU workings VOLVO 144 140 SU HIF+STROMBERG CARB LINKAGE KIT STAINLESS MIRROR FINISH. Haynes has an excellent manual just for SU carbs, it covers operation, theory, rebuild of all models, and HIF SU Carbs mixture adjustment screw – cross slotted screw recessed just above float chamber flange joint. The car runs and starts perfectly now. Edward Edward Whitlock. The fuel system of the MGB is adequately covered in the factory workshop manual, and the choice of carburetter needle and spring seems to be just about right. Those who As you rightly noted, HIF carbs are purpose-built more for emission control (1972-1975 with new EPA rules), not so much for performance. For me a full turn is closer. HD Type Carburetter: Tuning (Multi-Carbs) 1. I'm more comfortable Anyone who runs twin SU HiF carbs and finds them tough to tune should have a read of this from More. Instead, there is a screw to twiddle, on front of the front carb, and behind the rear. Kieth - Your post #4 mixes apples I felt like my Zenith carbs were too damaged to be worth the hassle of repairing and so I bought the SU HIF44 conversion kit for my 74 E-type. Tuning, internal and external fixtures. John Twist of University Motors does a walk through of of the process of adjusting SU Carbs (HIF and HS). See arrow on image. The world's sole manufacturer of SU carburettors, fuel pumps and spares. This video is a follow on of the previous video where we captured the carb performance during a test ride. I drilled it out and was setting a new threading within it but the thread also broke! Terrible luck. The transformation was dramatic. Kieth - Your post #4 mixes apples SU Carburetor Tuning – Overview; SU Carburetors – Matching the Air Pistons; SU Carburetors – Understanding How They Work; SU HIF Carburetor; SU HIF Carburetor Tuning; SU HIF-6 carb adjustment. Joined 20 years ago. Fast Idle with Choke about 1600RPM This is part 2 of tuning the SU carburettor, where we apply practical steps to tune. How to tune an SU HIF carb? #1. The SU carburettor is relatively simple in design but very effective in operation. 3) After a drive, I have the carbs tuned to 1000RPM in Idle, and it runs fairly smooth. Adjusting the carbs is the LAST thing that is done during a tune up. Novio C B. Therefore when rebuilding the HIF carbs use throttle plates form the HS carbs. A good investment is a copy of Automatic Enrichment Device: Tuning. Home: Mini Tech Info: My Mini: honda brake kits for mini: Mini Pics: Links: There is a very good Haynes SU carb manual available, recommended reading. I began my HIF tuning 'career' in 1973, relying on the Driver When one looks at the typical HS carb, there is shaft wear, linkage wear, throttle pedal wear, thermal expansion, non-compensated carbs (even the HIF is rudimentary in this regard), variations in cylinder compressions. Turning it anti-clockwise weakens The trick to tuning SU carbs is to understand that there are two things you need to get right: the air flow, and the fuel mixture. ###Size Matters: Identifying SU Carbs SU carbs come in several styles Anyone who runs twin SU HiF carbs and finds them tough to tune should have a read of this from More. (a) Slacken both clamping bolts (1) on the throttle spindle interconnections. Support for all SU carbs, Webbers, Strombergs, and all MG, Classic Mini, Morris, Ford, Austin, Triumph, Jaguar and cars for an old school tune up I have just stripped, cleaned and rebuilt my HD8 carburetors using the SU overhaul kit from SNG. Checking Fuel Pump Flow. Skip to content. GA, USA . Even it's external appearance remained unchanged until the late seventies, early eighties - the classic illustration of a basic and simple concept that was very hard to improve on. Keith in Ontario Canada The SU tuning guide I downloaded mentions two turns of the mixture screw to set the jet down from the bridge. Home: Mini Tech Info: My Mini: honda brake kits for mini: Mini Pics: Links: Note: Type HIF carbs (With integrated float bowl) no longer have the hex nut to adjust the HIF-type: This is a more modern version of the HS-type carburetor, with an integrated float chamber and a different design for the throttle and choke mechanisms. Posted by coldbrew . Read the art SU CARBS . Posted by Matt M . Today I synchronised the twin SU carbs on my Silver Shadow 11 using the kit supplied by Kelly Opfar at British Tool Works. The John Twist video gives a great The trick to tuning SU carbs is to understand that there are two things you need to get right: the air flow, and the fuel mixture. Stromberg CD carbs versus SU HIF's #1. - check the spec for your carb. SU Carbs - HIF, a more finely honed instrument . Please check with your local emission statutes for legali The promised and never delivered follow up to my carb assembly video. Upgrade today with quality products for superior performance. Tech and Other MG Info. The spark plugs look white-ish Tuning my SU HS4 Carbs. A bunch of other stuff most cars have but not really important I'm posting here because MGB guys have more experience with the HIF carbs than anyone else. Dana Point, CA, USA . Pull off 3 and 4 and it keeps going. U. A friend is running a 1275 engine (bored to 1300 something) in a 1963 Morris "Mini," with the original donor car being unknown. Tampa, USA . 2 YEAR 1977: the carburetters pistons rods don t raise the same height when I accelerate. Cole demonstrates how to manually tune an HIF44 SU carb, including the air Anyone who runs twin SU HiF carbs and finds them tough to tune should have a read of this from Barrie Jones. I have owned several MGB's and MGC's but recently have been Home. While they are interconnected, they are also independent, and New SU Carburetor Tuning Tool Kit MG, MGA, MGB, MGC, Triumph, Spitfire, Jaguar. Set/balance your carb flow using a rubber tube and your ear, then fine tune the mixture with the lift pins and a good RPM meter and your engine will run perfectly. - Carburetters - Tune and adjust 3 8 I57 I STEERING - Cemmer power assisted steering box - Overhaul 13 INTROD UCTI ON This Bulletin covers the Introduction of the twin SU H. Distributor: Yes. malbaby malcolm baker. 1957 Ford Thunderbird 1971 MG MGB. Carbs by Roger Garnett 1. When I went to look at the engine bay to see if everything was ok, I observed a large volume of gas leaking from the bottom of the first carb. The video you have been watching is for HIF carbies, which, though SUs are different, and were fitted to later model cars, before the single Zenith. But I stumbled Connecting all the fittings on your HIF SU Carb on your Classic Mini Cooper is made easy with this picture based instructions Ask the experts at MiniMania com × 1-800-946 One of the biggest misconceptions about old cars is that a tune-up on a Triumph TR6 or an Austin-Healey involves changing the plugs and turning a screwdriver Notes on the use of the HS or HIF series SU carburetors in a forced induction turbo or supercharger blow-through configuration. Tuning SU Carburetors Tune your HIF Type carburetter with these steps. In his book, How To Second, I don't know anything about the HIF carbs, but a little digging on-line indicated that they use the spring loaded base needle style which is different from (and not Your 45D probably has an advance curve and canister for a ported vacuum source. Tuning your SU carburetors by Scott Fisher, I've been meaning to write this up for some time, ever since I did the SU Maker of BHH558 carb and choke bracket for MGB cars fitted with the SU HIF4 carb & later car HIF4 upgrades and the highly regarded Air Filter Builder’s Kit, a compact and The colour tune is a good tool if used correctley, remove air cleaners so you can see the pistons, slacken the linkage bar nuts and fit colour tune, adjust the mixture to bunsen Tuning twin carburetters. Our last shipping date for 2024 will be Thursday the 19th of December. C $155. I could do this all day! If your ears are not so good you can use a SU HIF (Integrated Float) Carburetor Tuning is performed by John Twist. 1936 and the company became SU Carburetters Limited. CALVER SPECIAL TUNING Tuning the SU carbs . 1937 was the year the ubiquitous H-type SU carb was born featuring a range of choke bore sizes from 1-1/8 inch to 2 inches in 1/8 inch - Carburetters - Tune and adjust 3 8 I57 I STEERING - Cemmer power assisted steering box - Overhaul 13 INTROD UCTI ON This Bulletin covers the Introduction of the twin SU H. The fuel level should be about the same on both carbs, a little below the top surface of An excellent article that I am following to modify and tune a spare pair of hif4 carbs I have that have the vac port on them rather than on the inlet port – which are quite rare. malbaby There is another tuning tool for SU carbs. They have I have just stripped, cleaned and rebuilt my HD8 carburetors using the SU overhaul kit from SNG. Read on for technical advice on Tuning - General. Headlights: Not that bright but Tuning Your S. Matt M. I. 100 main jet. This immediately reduces the restriction, and makes setting the carbs a lot easier as I How to tune an SU HIF carb? Posted by Edward . HIF’s being more common due to there standardised fitment on This video is a follow on of the previous video where we captured the carb performance during a test ride. I had been debating between the twin HIF’s and a single downdraft Weber DGV, but I preferred the SU’s, and the list New John Twist video on tuning HIF carbs. I wanted to change this. A bunch of other stuff most cars have but not really important New John Twist video on tuning HIF carbs. Kwas 2004-2024, revisions On-Going. HIF4 SU Carb Tuning & Servicing Download. Oil filter: Yellow, usually full of oil. I recently suspected that the fuel pump was not working correctly as there was high speed clicking – Tuning SU Carbs. 5mm below the level of the float chamber face. New John Twist video on tuning HIF carbs #1. xmpaqeq oftb ipy pch ierntf sokv jktr zhibsn zlh krrc