Quote:
Originally Posted by Skip Fix
Back again to real world track testing- if square bore carbs with an adpater are so bad on a factory intake why did my car pick up et and mph over a pretty dialed in Qjet carb?
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I KIDD not: this last Norwalk, we put a "junkyard dog" Q-jet (dry-sat for 10 months, threw in my trunk for giggles at norwalk) onto a 17.4 ET "69 firebird" with an "aftermarket carb" and ( no other changes) dropped 3 seconds on the ET. Some talk/coach on the excitement took another 0.5 sec off the ET. Therefore 17.4 to high 13s from a carb change. Relevant to the issues in this Thread. The fella took my Q-JET home like a newborn! giggles indeed.
JUNKYARD DOG: a 1973 chevy truck Q-JET where the Top-plate NEVER came off. Accel pump rod on inner hole, installed BE Sec-rods. power-trimmed the Air-damp valve per the loaded 20 MPH pulls in 3rd gear. That proofed as-is for 12.2 ETs on my 68 GTO (the 1050 has since been on with equal ET, +0.5 MPH).
AFTERMARKET carb: some dumb Squarebore <\= 750 cfm, or at best an AFB.
69 FIREBIRD: some clapped-out 69 bird (68?) that they bought curbside on the way to Norwalk, put on the "just in case" trailer, and after a few beers and gutting the interior (in the pits) decided to run it. Fairly rust-free floors i might add.
NEWBORN; well the fella enjoyed the Q-JET a few months, and mailed it back to me.
3.5 seconds dropped in ETs: Time slips by a capable driver with all systems go. No spins, oops or butts.
I've since trew the "j-dog" on a 500" Caddy engine that all of a sudden idles well, and throttles real well ( that (hehehe) had a (heheHAH) a Predator carb).
just a dumb carb that works properly.
HIS