I am currently helping a mate with his turbo 13B engine build, but we have run into some problems with working out how to fuel it, it has a 600 Holley (dp) which it will be 'blowing' through.
We were thinking of building a box around the carb or just modifying the carb to cope with the pressure, does anyone know how to makie a 'carb box' or had any experience with them, or does anyone know what needs to be done to a carb for it to work in a 'blow through set-up'????
I know that a high pressure pump needs to be used and a rising rate fuel pressure regulator, and that the floats need to be filled with something to stop them crushing under the pressure, also i know that when not running a carb box there are several things on the carb which need to be sealed
Boost will be around 8psi and the fuel is Avgas
Any help would be great, or maybe someone knows of a good site that explains it 'in full'
I'm currently running a blow through system on a 1500 Fiat motor I have installed in my Yugo.
All details are covered except for a few you asked. There is some leakage around the throttle shafts but it's not any worse than the IDFs I ran on a Fiat Spider or my friend's dual carb X 1/9.
The only issue I have now I can't seem to figure out is I seem to be using allot of fuel under cruise. The DFTA carb was originally set up for a 55hp 1100cc engine. I thinking I'm making 75hp + 25hp (boost) on a 1500cc engine.
I would think I would need a bigger idle jet (bigger motor) but some people on another forum seem to think I need a smaller primary idle jet.
Otherwise the fuel/air meter says I'm running at stoch at idle but pegged out under cruise.