I am currently having a 454 built for my 03 Silverado SS that should be done within the next 2 weeks. Just wondering what you guys think I can make HP wise AT THE CRANK. Here's the build list.

-LSX BLOCK
-4.185" Bore
-4.125" Stroke Callies Crank
-Custom CP pistons With a mirror of the ls7 combustion chamber (not sure the exact word for the type of piston)
-Callies rods
-WCCH exhaust ported ls7 heads
-Jeremy formato ported ls7 intake
-Have to check on exact cam specs but its a comp cam around 242/252 .605/.610 lift on a 114 lsa. Like I said I would have to check to be exact but I know that's close.
-10.85 SCR (should act like a much higher compression motor than 10.85 because of the design of the piston eliminates compression loss)

 

for that big of a motor im sure you can get buy with a little bit bigger cam..just my opinion...since your already goin big..might as well get a big cam..that would be a decent cam for a 408..baby cam for a 454 lsx

 

Theres no reason to go with a bigger cam than that because of the enormous amount of air the ls7 heads flow.

 

650-700hp at the crank, just a guess.

 

Im shooting for 700 so well see where I end up.

 

Yeah, keep us updated as this progresses. You are doing something I'm sure a ton of us would love to do.

 

Will do......ive had problem after problem getting this motor done but I should finally have it running in two or three weeks.

 

depends on the dyno..dyno jet you should hit 650..on a loading mustang dyno maybe 500

 

Yeah im expecting anywhere from 500 -550 to all four wheels on the local mustang dyno....probably closer to 500.

 

i could be wrong here but to me if the ls7 heads flow an enormous amount of air why not get a cam that can benefit the big heads and flow that enormous amount of air..the stock cam of an ls7 is like around .59x lift...too me its like runing a 408 on a stoker on a ls1 hotcam..decent duration but low lift..its something you can also play with after you get it goin..there could be more left on the table..swappin a cam is only a 2-3 hour job if you dont have to change springs