Ls2 bottom end for boost?
Ls2 bottom end for boost? First of all, the goal is to get it setup for a reliable 10+ psi while remaining streetable. Boost will be provided by a Procharger D1 headunit. Heads are stock 243 with new springs. RPMs are planned to be kept within 6-6500 for drag racing, but i really dont see that being much over 6k.
Parts List
Crank - Stock crank
Rods - Eagle CRS6125O3D H-beam 4340 rods with 8740 rodbolds (390$)
Pistons - Diamond 11517 (This is a 4.030 bore piston, how do people feel about that on an LS2 aluminum block?) (653$)
Rings - Not sure what to go with here? (maybe the JE piston rings?)
Bearings - Clevite H series throughout
Main bolts - Either reuse stock or buy some arp?
Those pistons would have me at around a 9.77:1 compression ratio with the ls9 head gaskets. Is that way to high, or manageable for street use?
Any advice would be greatly appreciated guys.
Parts List
Crank - Stock crank
Rods - Eagle CRS6125O3D H-beam 4340 rods with 8740 rodbolds (390$)
Pistons - Diamond 11517 (This is a 4.030 bore piston, how do people feel about that on an LS2 aluminum block?) (653$)
Rings - Not sure what to go with here? (maybe the JE piston rings?)
Bearings - Clevite H series throughout
Main bolts - Either reuse stock or buy some arp?
Those pistons would have me at around a 9.77:1 compression ratio with the ls9 head gaskets. Is that way to high, or manageable for street use?
Any advice would be greatly appreciated guys.
You could go as high as 10.0 compression and be ok on pump with 10-12psi on forged internals.
If you were running a low power n/a engine I would say .030 over pistons is ok. For an fi setup with double digit boost levels I would want as thick of a liner as possible, so do a 4.005 piston.
I would also upgrade to arp 2000 rod bolts.
If you were running a low power n/a engine I would say .030 over pistons is ok. For an fi setup with double digit boost levels I would want as thick of a liner as possible, so do a 4.005 piston.
I would also upgrade to arp 2000 rod bolts.
You could go as high as 10.0 compression and be ok on pump with 10-12psi on forged internals.
If you were running a low power n/a engine I would say .030 over pistons is ok. For an fi setup with double digit boost levels I would want as thick of a liner as possible, so do a 4.005 piston.
I would also upgrade to arp 2000 rod bolts.
If you were running a low power n/a engine I would say .030 over pistons is ok. For an fi setup with double digit boost levels I would want as thick of a liner as possible, so do a 4.005 piston.
I would also upgrade to arp 2000 rod bolts.
Any suggestions on a piston? Seems to be hard to find some in that diameter with a good dish that dont cost an arm/leg. I havent measured the bores yet, but potentially i could get away with a hone and run a stock bore piston?
