On my d15b1 t/b .. i have 2 butterfiles valves... what is the top one for?

 

bump

 

They both allow air in .

You can't really do much the DPFI to upgrade, unless you convert to MPFI.

 

LOL ludesrv... I know that.. i just cant figure out what that top one is.. i wonder what would it do if i remove it, it seems to be makin my car run like **** ... hmm

 

DPFI always runs like ****.

I personally wouldn't touch anything inside that DPFI manifold. It's a really shitty setup. Removing the top one will make it run worse. It's because of the dual injector setup it has. Try cleaning it.

 

yea i dont plan on having it for long, in abuot 2 weekend im getting a ZC complete swap, gonna build it and set it up for a turbo.. YUMMY