does 4.125 crank fit stroked ls2 block
does 4.125 crank fit stroked ls2 block hi
got ls2 402stroker block
4inch crank and 4.005inch bore
could 4.125 crank fitt in the block, and could i bore out the block to 4.030inch
thanks
baezi
got ls2 402stroker block
4inch crank and 4.005inch bore
could 4.125 crank fitt in the block, and could i bore out the block to 4.030inch
thanks
baezi
TECH Enthusiast
Joined: Apr 2002
Posts: 537
Likes: 2
From: Lehighton Pa
Both are questionable moves reliability wise. But yes both have been done, and done with success. I wouldn't put that combo under any power adder stress personally.
i'm asking because i don't know...
could it not be used as a NA 11.5 CP motor
and in future plans 150 to 200 NOS shots
Baezi
TECH Enthusiast
Joined: Apr 2002
Posts: 537
Likes: 2
From: Lehighton Pa
If you have 150-200 on deck.. dont do the stroke, or the .030 over
If you go .030 you will have questionable cylinder wall thickness to handle a power adder.
The 4.125 stroke will result in a tight ring pack, and small piston height... Neither are something you want in a nitrous combo.
You might also have issues at BDC with such a stroke... but some say its not an issue.
If you plan on hitting it with 150-200 stay 402.
If you go .030 you will have questionable cylinder wall thickness to handle a power adder.
The 4.125 stroke will result in a tight ring pack, and small piston height... Neither are something you want in a nitrous combo.
You might also have issues at BDC with such a stroke... but some say its not an issue.
If you plan on hitting it with 150-200 stay 402.
I run a LS2 block bored .030" over with a 4.100 stroke, for over five years now and thats with a 300 shot, And the engine steal runs grate. In my sig, is the time that i run last week.
would there be some diffrence between 4.1 and 4.125 for reability you would think
i´m thinking of max 150-200 shots on mine.... or around 650-750rwhp
what are you internal, crank, rods and pistons?
thank
baezi
I run a Eagle 4.100" crank & Eagle rods with L19 rod bolts and Ross pistons. And had every thing balanced. I believe you would need the counter weights turned down because the wrist pin boss and the crank shaft journals will hit. Mine did on the 4.100 crank and had Ross clearance my pistons .Ross told me that i was at the max. and if i needed any more i would need to have my crank journals cut down
