10 replies to this topic

[orangeLJ]

Looks like you are still using the standard clutch pulley on the s/c?

What do you mean by die? does it conk out completely or just starts to misfire? Id be checking my plugs (if you can get enough driving time) to see if tis rich/lean.

What needle is in the carby?

Is the carby opening all the way up under load (ie. the piston isnt being obstructed by anything?)

If the blower is hitting boost and the carby isnt letting enough air/fuel in, then it would act like a blocked exhaust or similar where the car just wont go anywhere.

Pull the cabry off, check the butterfly in the rear, make sure it functions correctly, maybe throw a rebuild kit at it, check what size needle its running (should have two or three letters stamped on the needle) Im guessing its a carby issue.

[Bart]

Just a guess
May be the carbys not supplying enough fuel.
Adjust or modify carby (if not already as turbo's need modified carbys)
Or replace carby all together
Can someone here advise what carby to use as there have been a few turbo carby 202's here.

[Bart]

Just a guess
May be the carbys not supplying enough fuel.
Adjust or modify carby (if not already as turbo's need modified carbys)
Or replace carby all together
Can someone here advise what carby to use as there have been a few turbo carby 202's here.

Oh the ignition under boost is a good point too. Perhaps eliminating that would be the cheapest and simplest? VL turbo ignition coil perhaps? (Before playing with the carby?)

[orangeLJ]

the 2 inch SU should be fine for a 1.6 on only 6psi

Other options are a small DCOE weber, or a stromberg, or twin carbs etc.

[V-SLR5000-P]

That big fat SU is sufficent to feed a blown 1600. The blower would not make the calculated boost if the carby is not big enough to pass the required volume of air. Check usual SU tuning items, needle centred in jet, piston free throughout its travel, oil in the dashpot. Otherwise l'd try a richer (thinner) needle, or give the one you have a light file. But, theres no going back once you file it! SU's dont like a heap of fuel pressure but the system must be able to maintain 3-4lbs pressure at all time. You should also aim for around 32 degrees total timing including 15 initial.