thumpinc5

I have a new pump ordered, but it won't be here in time to get it installed before our date with the dyno on Wednesday. Has anyone sprayed a wet 150 shot through a stock fuel pump? Car made 398 at the wheels on motor.

Frank

nyg215

I did on my c5z when it was cam only and at 430rwhp. Completely stock fuel system. Every car is a little different though. You will know when you are tuning the nitrous if you can do a full run on 150 shot or not.

JoeyG

Start with a 75hp or 100hp shot first and see if youve got room. My personal guess is youll be running outta fuel on the lower shots

Mr.Fizoust

Just upgrade your fuel system, It just isnt worth it to trash motor because your trying to save a few bucks.

thumpinc5

Answered my own question for anyone curious. Ran the car on the dyno today with the stock pump. Not even close to maxing out the pump. We had to lean it out from ZEX's recommended jet suggestion. A/F was 12.46.

JoeyG

12.46 air/fuel on nitrous?

thumpinc5

Yes. 64 and 29 jets.

FourG63 97GST

how did you determine this, what does maxing out the pump mean to you?

thumpinc5

Answered my own question. A 150 is no sweat for stock pump.