Issues getting boost built on footbrake?
Recently got my c4 swap done in my car.
Motor is currently running 5-6 psi.
Im new to the whole auto thing but the auto swap is definatly the way to go with the turbo, the turbo and auto were made for each other LOL.
Anyways im having issues building boost on the motor with just footbraking. If i use the transbrake, the motor alone with no boost stalls 2500 rpm, then as the turbo comes in it will stall higher, at 5 psi it stalls 3800-3900 on the transbrake. no 2-step. I planning on turning to boost up to 10-12 psi. I am guessing the stall will go up even slightly more with a little more boost pushing on the converter?
Thing is on the foot brake, i can get to around 2400-2500, but it doesnt take much throttle, if i try to give it more gas to spool the turbo, the car just starts doing a burnout. I dont know how in the world i could even dream of footbraking boost. My street tires are 255/60, not too wide. I am guessing drag tires at the track heated up will hold traction better but i dont know how much.
Reason im asking is ive never messed with the auto so i dont know if this is common to have issues not being able to footbrake boost. of if a have a brake adjustment issue. I can yank the e-brake hard and it helps a bit but the drums are adjusted out to where the drums barely slide on, so i dont think there is an adjustment issue.
91 GT 302 CID c4 w/brake
TFS TW heads, f-cam, typhoon
70mm masterpower single turbo setup.
Last edited by foxfan88; 04-20-2011 at 10:14 PM.