650 rwhp build
 

hey guys i am new in this forum,


i would like to build my 5.3l sierra engine so i can put 2.9l whipple and go for high boost like 16 or 17 psi,


My target is to get 650 rwhp or more.

I know i have high compression ratio and it will be the main problem with this amount of boost. Our pump gas is 91- 93 octane but we can put ms 109 race fuel if we want to race.

- So i need from you guys to tell me what compression ratio is good for 16 or 17 psi?

- And i need to know what pully size can give me this amount of boost?

Also i decided when i put the 2.9l whipple i will put a custom cam on my car.

- I also want you guys to recommend for me a good cam size for my target.

I will use the car on street, i need the cam range to be from 2000 - 6000 RPM

Please advice and help.....:hail:

car model : 2015 5.3l sierra 1500

Call the guys at Whipple and see what their thoughts are on your goals. I don't know if they warranty their products, but they may be able to assist you in a way to attain your goal of 650whp while still keeping your investment relatively secure. It wouldn't hurt to ask.

Custom cam, longtubes, procharger, some kinda of fuel (methonal/e85) and let her eat. Theres a guy on here making 700+ in his procharged 15 5.3.

Sounds like a cool build, welcome to the site. Where are you from?

From Oman, middle east

i already sent the whipple an email but they didnt reply

I have a feeling you are going to run out of injector and pump before you ever see 650 whp.

A member here did LT4 injectors, LT4 high pressure pump and custom camshaft with fuel lobe change and ran out at 640 whp on E85.

Cool, the heat must make boosted setups a challenge.