im building a straight ls for road racing whit ctr pistons and would like to know what you guys think i should do for a compression ratio for this set up. im going to install crower springs and retainers and going to run 405 cam that crower makes for the ls and a set of itbs

going to be running it on crome reving it to about 8900 or so

the bottom end will be fully balance and going to run a a type r oil pump , and chamfer the oil holes in the crank to get better oil lubrication on the bearings.

i also have a question on piston ring gaps

for the first ring gap im going to run it at about .010 gap
and second ring im going to be runing about .012 gap
and oil rings about .018


im trying to make it reliable and not wear the rings out prematurely


if anyone has any insight into this it would be appreciated

thank you racingconceptz
anthony

 

ITR/GSR/LS oil pumps are one and the same. I hope someone didn't sell you a Type R oil pump and promise you gains in lubrication. I would look into getting a gsr/itr block girdle if you plan on reving that high.