Hello All, Need some advice. I have a buddy that is wanting to build the 4.8 in his 2003 silverado.
His goal is 600 rwhp

Truuck has 799s on it right now with stock pistons.
suggestions on forged pistons and heads??

Looking at BTR Stage 2 Turbo Cam??

Injectors looking at 80lbs??

Fuel Pump size??

Aleady have Single Turbo 76mm Intercooled setup he bought.

What converter would you run??

Any info would be greatly appreciated

Thanks

 

Run what ya got. Call about the cam. PTC, Circle D, ProTorque, etc. etc. for a converter. 600 is gravy.

 

799s on a 4.8? Swap back to stock heads and pick up power. Any mild cam, even stock, can make 600 in a 4.8.

 

Read through the sloppy mechanics wiki page and the what to buy for 2017 , these lead to the don't bs me 4.8 build which made the power you are looking for . If running gas decapped truck injectors work great , look up Derr injector service - great guy to deal with and much cheaper than dekas and easy to tune

 

For 600 hp I wouldn't' bother switching heads out if they are already on there. Will only make it more pump gas friendly. Any mild shelf cam, 1218 pac springs and 14-5lbs. You don't need to touch the engine.

 

The only hard parts I would be overly concerned about are in the transmission. Trucks are heavy and 4l60e transmissions are not happy when you add power to a heavy vehicle. The addition of a higher stall torque converter just makes the problem worse.