Getting ready to start my 09 Sierra Denali 6.2L Whipple build. Just curious what HP you LS guys would predict this thing is going to end up with. Just round about numbers...of comparable setups I guess. It will have:


2.3L Whipple running at around 10 PSI
Texas Speed VVT-1 Cam (223/227 113LSA-1)
LS3 Ported heads
63lb Bosch injectors
450 Walbro with return system
1 7/8" long tubes, into 4" single (Magnaflow)
Circle D 2800

 

600 wheel

 

Alky Meth Kit also will be thrown on with the build. I'm really hoping I can get 600 to the wheels with the setup.

 

You should be able to get near or over 600 wheel, but you will need to be careful with the factory 6.2. They seem to love breaking piston crowns with not much more power than what you are talking about.

 

Well then i'm going with forged rods and Wiseco pistons during the tear down then. just simply for piece of mind


Also Texas Speed recommended going with a -11 dish on the pistons so that my compression would be around 9.2/1 and it would be better for the FI Whipple setup.

 

I think at 9.2 you need more boost than 10 or you're leaving a lot of power on the table. Happy building!

 

I'm just going by what those guys recommend for the setup I'm going to be building. I listed off all the parts going into the build and they said the lower 9.2/1 piston are what they recommend for the FI setup, the tech said it would run more effienct, be easier on the engine and ultimately can make more power with them

 

That is true if you are going to go to higher boost, but a 10:1 compression engine will run much better out of boost and would be fine on 10 PSI of boost with the tune being proper. FYI, I have a Wiseco -11 cc on my build with small cc chamber heads for a 10.4:1 compression.

 

Yea I am no piston compression ratio expert for FI setups what so ever. I am just taking advise from people that are suppose to be knowledgeable in the build im trying to complete. My goal is a durable/reliable daily driver with 600-650WHP

 

I'll agree with you and say 9.2 is fine.

I say this because at higher compression ratios, everything becomes more important. 9.2 can survive a bad tank of gas, or a heavy downpour, or being real heavy on the throttle with a trailer behind you, etc.

Gap the rings, run premium and let your tuner do the rest. For a truck that you want A) Power B) reliability C) longevity I would stick to 9.2 and if you dont like it or want more, re pulley the blower.

My tvs1900 build is 9.5, for what its worth.