Michael Austin's Journal - HIF 4 Carb Setup And Mixture …
WEBJan 5, 2013 · HIF 4 Carb Setup and Mixture Adjustment. This article attempts to provide some alternative mixture adjustment and basic set-up advice for the HIF4 carb and grew out of a thread whereby I was encouraged to submit the main points as a library article. First some assumptions: • You have a shop manual and have reviewed it.
80 MGB carb conversion to twin SU's - British Car Forum
WEBMar 7, 2008 · I use HIF-4's for converting power brake MGB's to dual SU's. I cut one of the carb spacers in half for more clearance. K&N did make a tapered air filter for the rear carb or a Unipart # GFE1063 Dolomite filter can be used.
Starting point to adjust mixture on HIF SU carburetors
WEBMar 25, 2018 · 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). For me a full turn is closer.
VotW - Dual S.U. Carburetor Tuning - Just British
WEBNov 9, 2016 · While this video specifically addresses the HIF4 carbs of the MGB, the same basic principals of tuning and balancing apply to all dual SU setups. We covered the basic theory and operation of the S.U. side drafts in the past, but this video is more specific to their actual tuning.
DIY Open Air Filters for Twin SU Carbs : MGB & GT Forum - MG Exp
WEBMay 17, 2023 · I had the opportunity today to fabricate an open air filter set up for an MGB with twin SU HS-4 (or HIF-4) carbs. I know others (including myself) have done this mod before, but while making the ones I made today, I took a few pics.
[Solved] Twin SU HIF4 Carburetor rebuilding - MG Exp
WEBDec 8, 2018 · You need to be aware that there is 2 models of the HIF type carburetor used on the MGB. The ID number is found on a small alloy tag on one of the suction chamber securing screws. 1) the earlier is a AUD 493 and has a notch in the throttle disc.
Tuning the SU carbs - mginfo.co.uk
WEBTuning the SU carbs. Ok, this section is more about the upgrades than trying to help you set the carbs. there are plenty of good websites that detail setting up twin carbs. For example, here's one such guide. I would seriously recommend a couple of specific tools for the setting of carbs - either buy or borrow depending on how much use to which ...
Seeking HIF4 gurus - need help! | British Car Forum
WEBJun 27, 2010 · Basically I've bolted a pair of HIF4 carbs to a dual intake manifold connected to a high performance GX cylinder head.
Tuning the SU Carbs - MGB tips mods and maintenance
WEBOct 16, 2019 · 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. Read the article as it explains the benefit of these carbs.
SU Hif4 Carburettor removal, refit setup and balance
WEBMay 18, 2017 · I repeated the colortune setup and discovered that the mixture on this carb could be adjusted considerably weaker with the beneficial effect of improving the idle rythym. I will examine the two rebuilt carbs and see if I can identify the blockage** in the forward carb; but if my original pair are now running in an acceptable manner then I may ...