View Full Version : TBI

chad cassady
08-23-2005, 01:23 PM
anybody have any guidance/experience with adapting a TBI system onto a stude?

Mike Van Veghten
08-23-2005, 01:39 PM
What happened to the blower?
Or are you doing both?

Most 4 barrel throttle bodies are a bit large for the Stude. There may be some smaller ones on the market now. It's been a whle since I looked. A two barrel can be made to work pretty easly. Just doesn't have the visual appeal.

08-23-2005, 03:25 PM
Accel has a beauty at Summit for $325 PN 74135B, 750 CFM aluminum billet
Throtle position sensor, with Accel's 150448 PN injectors you are good for up to 20# of boost and about 450 HP.

Dan White
08-23-2005, 03:50 PM
Be very very careful about using a TBI on a blown system. The TBI uses the throttle position sensor to set the mixture, not like a carb which can "measure" the air flow by the venturi effect going down the carb throat. You can run into a lean mixture situation under full boost, not a good idea!!!

Dan White
64 R1 GT
64 R2 GT

chad cassady
08-23-2005, 10:24 PM
Yeah Mike I still have the blower on and just finished up with westech last week. I posted the before/after dyno info on the stude racing forum, check it out. Talking to the westech guys they were all about using tbi to blow-thru. suggested larger gmc tbi or holley with the 950 commander computer to control fuel and timing. any ideas? My carb is now a piece of work... highly modified to say the least. Runs a little rich in the lower rpm range so that it wont lean out up high. Saw a 65hp (50%) gain with 6lbs in the manifold.

08-23-2005, 11:59 PM
The Accel unit I told you about is DFI it comes with fuel rails and other small parts just add injectors the 45# pressure kind no bungs in the manifold and a Mega Squirt and Mega Spark controler and you are up and running for less than $800.