rm2932":3e7ggx1z said:Cause I have already cracked a 5S crank. Didn't want to go nuts on it with a knife edge to have it crack again. if I crack another one I will be getting a Brian Crower Billet Crank.
CSAlltrac":1aclqfiy said:Beautiful build RM., I can't wait to see the end result. I always love seeing the different methods/tactics guys take to make all the components of a car withstand high HP figures. I think 400 wheel will always be enough for me, if I ever get bit by the high HP bug Ill just have to go to a meet where one of you guys are and pay you for a ride.
l0ch0w":3tzk5hya said:I know a few who have cracked or warped the 5S crank. Its because the rod ratio is not ideal...
The stroker crank just doesnt seem to enjoy over 8000 rpm... which is why alot of the high HP guys are switching to an oversquare 2.1L with a 3S crank, 88mm bore in a 5S block. Much stouter.
I believe most of the 800+ guys (mostly MR2s albeit) arent running typical off the shelf bottom ends, they tend to use custom measured rods and pistons to meet their demands. Most are in favor of a piston design with shorter skirts, pin height, and longer rods to reduce side loading.
alltrac101":zktlx2ze said:was 870 @ 43 falling to 39.....good catch....that was with a 2.2....this is with a 2.1, my spare, Ive always wanted to try it....& yes it makes more power de-stroked...755 & 30 psi....now run the aem boost solenoids & it holds boost