My Drawthrough supercharged A15 used to lean out at 6000 rpm's. I upgraded my line including the pickup inside the tank as well as fitting a holley blue pump. fixed the problem.

Maybe your float level is too low? That'd cause it.

!!!! HE'S RUNNING A BLOW THRU SETUP NOT DRAW THRU !!!!

Lol its because andys first post reads he did a draw through setup but if you read the rest its clearly a blow through

ok guy's im real sorry i did accidently put draw through up but it is a blow through i nhave edited that now appologies for the inconvenience


so lastnight i ran a new fuel line 10ml and i will try and get a elec fuel pump from a vl at u pull it tonight or will this b too much fuel preasure without a regulator??
if so is there anyone in adelaide that has a 10psi fuel pump that i could borrow for a day to test this theory because i dont want to buy a low preasure one to test it then a bigger one if it works
and i cant turn my boost down lower than 7psi because thats wot its running std...

That's the way Andy.
I reckon the problem is the lines but since reading Aiden's post that makes sense also, just one thing though. If it is leaning out at 5000rpm would that be where the turbo is making enough boost to exceed the fuel pressure? I've got my money on fuel lines though.

Perhaps Dan Gyles could lend you an electric fuel pump. He may have one lying around. I'll ask Scott today if he has one.

Are you hanging onto that Weber adapter plate off Aiden's engine? If so are you willing to get rid of it?

uhm i yes already asked dan but no dice
i would prefer to keep that plate for weber do u need it man??

so any luck with talkin to that guy yet about that thousand?

Just spoke to him. He hasn't made any progress yet but he will call after lunch with a response. He's a pretty busy man running a workshop and crash shop so hopefully he finds the time to get it finalised.

That's cool with the weber plate. I'm looking at getting a weber soon but it's all pipeline project work.

I'll call you as soon as things are happening.

ok sweet mate thanx.

I have also been told (like someone has already said) The fuel pressure should always be 2psi more than the boost. This is ment to stop the boost in the carb affecting the fuel pressure which makes sense. I have also read that plastic floats are better than brass ones as the wont collapse under boost. rising rate regs will also help maintain fuel pressure under boost conditions.

ok thanx guys i got a reg ordered so i should get it nxt week and ill give it all a try