Forced Induction Weber Jetting?

[SHO-Z]

I need some help trying to figure out where to start on the jetting on my forced induction project. I have triple 45 MM SK Racing Carbs with 33 MM Chokes, Weber Clones. SKs use weber jets. I am planning on running around 11 psi of boost. From my calculations I will be feeding air equal to a 5 liter engine through the carbs. I have gone through the weber jetting articles on the web and seem to be missing something.

 

If anyone has any input on were to start with the jetting I would appreciate the help.

[datsunlover]

I'm not much help on webers, but a guy here I know had webers on his car for a while, and seamed to know quite a bit about them. His handle on Hybridz is "ZR8ED" .. Hope thats of some help..

[SHO-Z]

I have checked to see what I have now.

tripple 45 MM Carbs

34 MM Venturi

Jets

Mains 135

Tube F11

Air 165

Idle 50

 

If I calculate using the area of the jets from increased air flow of

1.8 times more air @ 12 PSI of Boost

 

Mains 180

Tube F11

Air 155

Idle 65

 

I really feel that these are larger than I need. Any of you weber experts please give me your input.

[Guest 81na ZX]

Are you running blow through or draw through?

 

"stock" Webers won't hold up to positive pressure (so no blow through).

I personally though for draw through you kept the fuel almost exactly the same but a little richer, cause its just pulling in more air.

[SHO-Z]

I have found several people using blowthrough webers and SKs using turbos. It is also metioned in my Weber book. I am going to try this and see if it will work for me. If it doen't work I will try using the supercharger wet.