NJFBOA - Home of New Jersey's Camaros and Firebirds - View Single Post - Getting my new 406 SBC installed, running, and driving

IROCZman15 · 03-18-2021, 08:29 PM

absolutely true. that is something I am aware of. with the engine ring gapped for nitrous, and the cam profile, I know that I won't make the 22 inches of vacuum that the booster wants to have. The canister will just hold more vac as a reserve for the brakes, but it wont be 22. the Holley Datalogs (see many previous pages of this thread) are defaulted to MAP and kpa readings instead of vacuum. Doing the math, I know I will fall short. we shall see!

I ordered the tank last night and probably will install it sunday. I will get to try it out a bit and then go to Island on April 3rd to really test it out. Several racers have recommended that I could get a bit more brake vacuum for staging and launching by putting the car in neutral while rolling to the line and giving the engine a few revvs. I might try this too.

03-18-2021, 08:29 PM	#276
IROCZman15 10 Second Club / Meet Coordinator Join Date: Dec 2004 Location: Roxbury, NJ Posts: 2,101 iTrader: (8)	absolutely true. that is something I am aware of. with the engine ring gapped for nitrous, and the cam profile, I know that I won't make the 22 inches of vacuum that the booster wants to have. The canister will just hold more vac as a reserve for the brakes, but it wont be 22. the Holley Datalogs (see many previous pages of this thread) are defaulted to MAP and kpa readings instead of vacuum. Doing the math, I know I will fall short. we shall see! I ordered the tank last night and probably will install it sunday. I will get to try it out a bit and then go to Island on April 3rd to really test it out. Several racers have recommended that I could get a bit more brake vacuum for staging and launching by putting the car in neutral while rolling to the line and giving the engine a few revvs. I might try this too. __________________ 1987 IROC-Z - modified Last edited by IROCZman15; 03-19-2021 at 08:03 AM.