I wanna take a stock ls1 block and build it as a 440 stroker while using 241 casting heads ported with larger valves. Trying to make 500 RWHP undercover in the apperance of a stock ls1. I'd like to keep the CR around 10.5 to 1 Any thoughts.

 

resleeving the block is going to be expensive.

 

+1...Are you trying to do it keeping a total stock appearence? So keeping an LS6 intake and stock exhaust manifolds or what?

 

I just wanna keep the block and heads giving it the appreance of a ls1, i was thinking the 92mm fast intake and throttle body and kooks headers.

 

Im conserned that the 241 heads wont flow enough for that build.

 

They probably wont. You will save alot of cash by going with a 6 liter block and maybe some L92 heads? I dont know much about the gen 4 motors.

 

No, i know i could save money going that way but i want the appreance of the ls1 for several reasons weight being the biggest issue. Sleeveing the block is no problem. Has anyone completed a similar build, from what i have read 440 is about all i could get id realy like to go bigger.

 

sacrificing power for the mere look of an ls1 is not a great idea.

 

So are you saying the 241 heads ported wont flow enough. What about 243 heads ported, do i have any other options?

What heads would i need to make the combination work

 

I know of a company that resleeves the LS1 and bores it out to like 499 cubic inches. Dont know the name but I remember hearing about them.

 

The problem here is the bore, if you go to a 460 the bore is so big the sleeves are worthless outside of a NA motor and there is no room to re machine if nessary. I need more stroke.

At 440 the sleeves still have enough meat for a turbo or nitrous with a little room to re machine if somthing happens. I'm just not sure what heads i'll need for the motor to work right. I could use aftermarket heads if i had to.

 

Almost certain you would have to use aftermarket heads. TFS!!!