Engine:
LS6 Darton Block
4.130" x 4"
Coated internals
AFR 225 heads hand finished
SCR: 13.75:1 / DCR 7.99 / Cranking ~204
Cam: 250/262 ~.650 112 + 0
Fast 90mm / 90mm TB
LG 1.75" pro long tubes w/ HF merge / 3" duals
peak hp ~ 6400
peak tq ~ 5500

 

Sounds like a stout setup. Are you staying hydraulic or going SR? If hydraulic, who makes a hydraulic cam that large, I thought Comp only went up to ~248 or something like that. Also, are you going to continue to spray, or are you going to go all motor with the new one?

Shawn

 

99% solid + some juice

 

If you're looking for max HP, ditch the 1-3/4" headers. Go with 1-7/8" or larger.

 

A set of 1 7/8 stepped to 2" would be nice for that set-up. Why such a low DCR? I'd try and set it closer to 9:1.

 

Phil, don't use an LS6 block. Use an LS1 block. Also, go with Kooks 1-7/8" headers. You building the motor yourself?

Mikey

 

Mikey,
Yeah I am going to build this one. I built my 346 forged motor and runs great. I'll probably fab some new headers up myself also. Maybe 1 7/8 to 2" step. Why did you say not to use an LS6 block?
Phil

 

Steve from Race Engine Development says the LS1 blocks are better for re-sleeving and are stronger. I met with him at PRI and he knows his stuff. Who are you getting the block from? You need to hold 0.005" tolerances when cutting the blocks. That can only be done on a CNC mill.

 

Couldn't agree more on both of these, especially with the DCR!

 

Looking at the numbers on another program says my DCR is wrong. Engine analyzer says 7.xx but on every other calculator it says 9.xx:1.