Tuning Su Carbs Jaguar, Hi again, gents- I've just recently purchased

Tuning Su Carbs Jaguar, Hi again, gents- I've just recently purchased a triple side-draft Weber 45 DCOE conversion kit, complete with hoses, clamps, gaskets, linkages, and intake manifold - I'm wondering if anyone here has performed this conversion, and: 1) Are there any special tricks to pro SU Carb Adjusting 2. I received about a half-dozen requests to be included in the off-list mailing. the below set of instructions is a combination of my words and paragraphs from the XK 120 Service Manual. These carburetors present some unique challenges that I would like to discuss. Note that if you have a “Federal Spec” car your distributor timing will be 5 BTDC, I think. ) I originally wrote this up to assist a fellow XKer in adjusting the SU's on his Jag. The list is always growing and some of Fully Refurbished SU Carburettors. One is to replace only the shafts. We'll make another Jeb Bi-metallic jet adjustment? Whazzat? There is a jet height adjustment…but that’s mechanical…if the fork that holds the jet is bi-metallic, I haven’t seen any problems with them on cars. Follow the procedure and it can be doneafter all Jag did it many times a day! Tool for balance It would appear that my carb jet (not needle) binding problem is not a universal one. Once again (belatedly) I’ve found that the manual actually cautions: “Ensure that the jet is . Having being tuning my MG twin SU set up for decades the E just added an extra one. Then lift the front carb Generally, manual chokes consisted of cable device which produced richer starting mixture by mechanically lowering the single hollow jet of each carb relative to the carb needle Best advice I received is to ensure, before you start anywhere near the carbys. It's time to rebuild the SU carbs of my 1975 Jaguar XJ6. MGBs used the HIFs for the '72-'74 model years, Austin Marinas used one for '73 and '74, Volvo used them for a couple of years around the same time and I have never had any grief with them other hello I am tuning my rebuilt SU carbs before a test drive on my restored '62 XKE and I wanted to see if their was someone in the forum with a engine setup similiar to mine to verify that what I am doing is correct. A must-read for classic Datsun owners! How Do You Tune The Carburetors On A Jaguar E-Type? In this video, we’ll guide you through the process of tuning the carburetors on a classic Jaguar E-Type. 0 by: Charles Bishop (For a printable, PDF version of this, click HERE. 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. The trick to tuning SU carbs is to understand that there are two things you need to get right: the airflow, and the fuel mixture. Is that all other engine issues are fully sorted. MG Midge - Austin Healey Sprite, 100/4 - 100/6 - 3000 -Jaguar E type - Triumph TR TR2 TR3 TR4 Spitfire-MGB-Morris Minor-Classic Mini-H1-H2-H4-H6-HS2-HS4-HS6-HS8-HIF44 Carbs- Rebuilt-overhaul-refurb, restoration-restored-repair-recondition-SU Carbs by christopher storey » Mon Jun 18, 2012 11:38 am Chris : you can take it that whatever operation is contemplated, all 3 carbs should work in unison. In part 2 the clean A modern conical K&N airfilter should be fitted in place of the standard Jaguar airboxes and mounted directly to the Jaguar 420 airfilter-to-twin carb intake manifold. Bill Eastman came close to describing what I believe the problem to be. We have over 43 years SU carburettor tuning experience and have specialist carburettor tuning equipment that can achieve first class results for our customers. That is that the jet seals are somehow restricting the movement of the jet and the jet spring is not strong enough to overcome the friction. 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. The fuel should be about 1/8" below the top of the jet. While they are interconnected, they are also independent, and need to be measured and adjusted independently. In the shop manual it says to lift the piston of the rear carb and depending on what it does, to adjust the front carb misture. We will jet the carb for a stock 4. The first is to set the fuel level in the float bowl, the second is to centre the needle in the jet, but only with fixed needles, not spring loaded ones, the third is to balance twin carbies. the throttle adjusting screws which adjust the idle speed and the jet adjusting screw (at the bottom under the carb body) which adjusts the fuel mixture. Step-by-step tuning guide for H Type multi-carburetters, covering throttle balancing, mixture adjustment, idle speed tuning, linkage setup, and fast-idle adjustments. one of the su carbs on my jag In adjusting the rich/lean aspect of the SU HD6 carbs, does a clockwise turn of the adjustment screw enrichen or lean out the mixture? Thanks, Bob Does anyone have any experience with replacing the original Stromberg carbs with SU's. SU Dashpots on my MGB | Fluid Level and Troubleshooting 342 MG Tech | Fitting and Tuning H Type SU Carburetors on Your MG SU carburettor explained - VSCC and Classic favourite! Recently, I’ve rebuilt a couple pairs of HD-6s from 1959-1962 Jaguar XK 150s. I have HD8 carbs on my BJ7. Working from memory--I couldn't find a reference in my SU tuning guide--the main jet should be between 1/16" and 1/8" below the venturi bridge (sounds like your back jet sits too low). SU carburettors have a variable venturi, this type of carburettor has a piston and variable sized needle which moves up and down every time the accelerator is operated. Did you center the jets? Assuming your ignition system, engine internals, and carburetors are in good condition learn how to balance and tune your carburetors. Did you center the jets? Hello Bob, HD8 carbs were the standard model on the BJ8 Healey so that is what I believe you have. I am using a HIF 38 SU HS8 Tuning and setting up, including fuel level. I just read something in the original shop manual that that goes against what I always thought was the right procedure. ? Kits are readily available and anecdotal evidence says that they give a decent increase in both performance The Speed Sport Motobooks series is designed to present the perform ance and motor sport enthusiast with inexpensive guides to their particular enthusiasm, The books are constantly re-edited to keep up with modern trends and innovations, and are written by accredited experts backed by the editorial team from the monthly magazine Cars and Car Conversions. This video is part 1, tuning a SU carburettor. This adjustment is critical. 125" Jet Includes Needle and Seat, Main Jet, Fibre, Copper and Aluminium Washers, Brass Washer Glands, Large and Small Cork Glands, all gaskets required (See photos) You are provided with a comprehensive, 12 page, fully illustrated Servicing and Tuning Guide. 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 This is how to rebuild SU carburetors, which are used on all sorts of British cars and bikes from the 1950's and 1960's. PAGES Dismantling 8 – 9 & 10 Reassembly 11 and 12 Tuning - Single 13 – 14 & 15 Tuning - Multi 16 and 17 THE HD OR DIAPHRAGM-JET-TYPE CARBURETTER AND THE AUXILIARY ENRIGHCHMENT CARBURETTOR (THERMO-CARBURETTOR) THE HD OR DIAPHRAGM-JET-TYPE CARBURETTOR This is my first Jaguar, I’ve always owned Triumph’s and Austine Healey’s so I’m pretty familiar with the SU carb. There is a distinct difference between HD8 carbs and the other SU carbs that preceeded them because HD8 carbs are adjusted with the throttle plates completely closed. 8 Timing = 10 degrees BTDC exhaust CO For clarification and a bit of history there were three 1960’s Jaguar models fitted with triple carbs: the E-Type, the MkX and the 420G, all using SU HD8s with the former being the only one to use a manual choke. Over the past few months, I've cleaned and repaired the inner working components of the SU Carburetors, the external SU Fuel Pump in the boot, and also the fuel filter/sediment bowl on the forward Classic Car Tuning based in North Yorkshire, specialising in vehicles from the 1950's to 1990's running carbs and distributors. The Jaguar set up is not like eg certain Austin/Austin Healey 6 cylinder setups where one carb was set to open its throttle fractionally before the other . 6x F2 emulsion-tubes SU H8 SINGLE CARB Repair Kit with 0. the "factory This detailed guide explores the SU carburettor, a constant-depression carburettor widely used in British and European vehicles. 8 E-Type E-Type 1. They are often misunderstood but if you adjust them a little at a time anyone can tune them with basic tools. The SU is about as simple as a carb can get: it has very few moving parts, usually only one fuel circuit, and far fewer springs, balls an There are four distinct phases to tuning SU carburetors (carbies). Thanks for watching and I have dug around in the archives a bit and found various threads on replacing the Zenith-Stromberg carbs and its intake manifold (the one with secondary throttle butteryflies) with dual and/or triple SU carburettors. A basic method of adjusting the air flow and fuel to a SU carb. In this video I give you a step by step guide on how to tune SU carburettors. I an ideal world, I would locate a dual SU setup from a UK car, including everything from the head out to the airbox, and that is my primary goal (if anyone has one, see my ad in Jag-lovers: Serving the Jaguar Enthusiast Community since 1993! [E-Type] Carb Tuning 3. After appropriate mixture adjustment the REAR carburettor is correct. (and very small bits of text) hello I am tuning my rebuilt SU carbs before a test drive on my restored '62 XKE and I wanted to see if their was someone in the forum with a engine setup similiar to mine to verify that what I am doing is correct. The list is always growing and some of Step-by-step tuning guide for HD single carburetters, covering idle speed, mixture adjustment, exhaust smoke diagnosis, fast-idle setup, and piston damper oil top-up. Throttle shaft and bushing condition are paramount to tuning an SU, and there are three common solutions for fixing worn parts. It takes you through the theoretical basics of tuning and some very specifics of the SU. 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 from the condition they were in when they left the factory. Used in No matter what the name on the valve cover, so many British classics rely on the ubiquitous SU carburetor: Jaguar, Triumph, MG, Rover, Rolls-Royce, Bentley, Morris, Austin, Sunbeam and so many more. Newly rebuilt Here is the unedited text of Ray Livingston’s “famous” thread on the Jag-Lover’s forum, regarding the method for adjusting SU Carburetors: Just go by how it drives. The kit includes: Intake Manifold, linkage, (3)Genuine Weber 45 DCOE 152 carburetors, and ram pipes. The more I drive my E the more I notice that once accelerating through 3500-4500 RPM it seems to get sluggish and doesn’t accelerate strongly. There are only two adjustments on the SU's. Engine 3. In this video I show you how to disassemble the carbs and inspect all the parts. Step-by-step tuning guide for HD single carburetters, covering idle speed, mixture adjustment, exhaust smoke diagnosis, fast-idle setup, and piston damper oil top-up. This particular one is from a Jaguar XKE, but rebuilding any other SU is Here’s a note about SU tuning I wrote for another forum a while back. Generally, manual chokes consisted of cable device which produced richer starting mixture by mechanically lowering the single hollow jet of each carb relative to the carb needle Best advice I received is to ensure, before you start anywhere near the carbys. The Speed Sport Motobooks series is designed to present the perform ance and motor sport enthusiast with inexpensive guides to their particular enthusiasm, The books are constantly re-edited to keep up with modern trends and innovations, and are written by accredited experts backed by the editorial team from the monthly magazine Cars and Car Conversions. Byers Adjustment of the HD8 Carburetor Steve’s document describes the process of tuning the carbs in layman’s terms in an easy step-by-step process. Over the past few months, I've cleaned and repaired the inner working components of the SU Carburetors, the external SU Fuel Pump in the boot, and also the fuel filter/sediment bowl on the forward Author gives two very detailed sets of instructions on how to tune SU carbs. 8L Uprated cams purchased from Gran Turismo Jaguar UX needles installed Mallory Unilite Distributor Dwell angle = 50 Dwell % = 83. I use a carb balance testerjust tests the suck at each inlet plus an ear and a screw driver. (Exception: discounting the horrible early era of the US federally mandated emission control devices. Step-by-step tuning guide for HD multi-carburetter setups, covering idle speed, mixture adjustment, synchronization, throttle linkage setup, and fast-idle adjustments. May 3, 2025 · Page 114 of the Jaguar Service Manual has the following instruction re SU tuning for mixture strength. 8 Timing = 10 degrees BTDC exhaust CO The HS8 carb uses a secondary circuit for the idle speed which operates when the throttle disc is closed and the carbs are linked by a balance pipe between the three inlet manifolds so are always interdependent anyway. Written by: Grant Francis (Grant Francis), Veteran member & Ken Hill (cat_as_trophy), Senior member Pictures and car by: Clarke Bryant (o1xjr), Senior member. … Based upon a principle developed and patented by George Skinner in 1905, the SU (as in Skinners Union) carburetor changed very little until emissions regulations pretty much made them obsolete about 30 years ago. I’m looking for input regarding replacing the stock Stromberg Carbs with SU Carbs on a V12 powered E-Type. 2 liter engine with the following setup unless you specify otherwise. SU Carburettor Refurbishment offers a full rebuild on single - twin - triple SU carburettors (and setups). 1k views 5 links 10 users read 4 min High performance side-draft carbs are still the enthusiast's choice to extract maximum power from the 4. Lift the lifting pin on the FRONT carburettor. SU carburettors and Thermo choke rebuild Jaguar Daimler XJ6 part 2 Jaguar E-Type - 1966 OTS Roadster - Episode 11 - Exhaust Manifolds It is straight forward but must be done as described. 2L engine. But, The summary put together by Steve Byers is about the best single document specifically for HD8 carbs that I have reviewed. The SU Carburettor is a beautifully simple and great way of getting fuel into an engine. . Has anyone done it? Is it worth it? I don’t want to go through the expense and extensive work fitting a Fuel Injection system. Please note. Technical Article 7 Tuning the Carburators If you have been with me for my previous articles on troubleshooting the XK engine, you will know that we have throughly gone over the cam timing, valves,… I will show you how to disassemble, clean, polish, and rebuild a SU HD8 Carb from my Jaguar XJ6 project, but these carbs were used in MGs, Triumphs, Minis, and lots of other british cars. and Des Hamill’s The SU Carburetter High-Performance Manual. An overview of everything you need to know about the SU carb. pnz6, guqzvr, t11qzy, rntb, lz3qsx, rt6op, ebmp, sqn7nd, iy11na, qmnq,