Currently have an 04 M6 LS1 with some mods listed below. Wondering how much power increase I would see if I swapped out my bottom end with a stroker kit?

Currently making 437 rwhp/ 397 tq

Mods:
Svede OTRCAI
42lb injectors
UD pulley
Trickflow 215 heads
Custom grind moderate cam (231/243 113)
Kooks 1 7/8 LT
Spintech 2.5 inch exhaust

 

Heres what Im looking at:

4.00 Eagle 4340 forged steel crank
4.00 Ross 2618 forged alloy pistons
Eagle 6.125 H-beam rods
402-CID displacement
11.3:1 compression ratio

Planning on sleeving also

 

Why not just get a lq block instead of sleeving.

You should be in the middle 500s.

 

I'd bet you make about 440whp.

 

You don't usually sleeve to just 4.0, it's usually 4.125. If you use your ls1 block you will have to do the wet sleeves. Alot of money there. Easier going to a lq9 iron block setup.

 

I'd say 450rwhp, with about 460-470 torque.

 

if you did a 383 stroker using your stock block and a 3.908 bore and 4" stroke ,you could make over 500 rwhp and tq.you will need a new custom cam ,and a fast intake.

 

I make just over 500 with a iron 403, TFS 215, 239/243 cam and a fast intake.