Building a 327 N20 motor
07-20-2005, 10:38 PM
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Building a 327 N20 motor I'm thinking of building an ls2 with a LR4 crank for a Ls1 swap car...
If I want to save some money I will go with a 6.0 truck block.
I'm looking to blend street manners, MPG, Economical build and power.
Probably the truck block... Tougher? Anyway
4.0" bore 3.27" stroke. Closer to 329cu
6.3" 4340 forged rods L19 bolts. If you guys with strokers run 6" with 4" long strokes I know I can go with even longer rods .... But that is expensive and the rod ratio at 6.3 or stock LR4 is awesome as it is.
Forged pistons with offset wrist pins.. Probably wiseco.. 35psi+ N20 at 9k rpm could'nt kill them on a 4g63... Good tuning is part of it...
Oversize ARP head studs. O-ring head and block. Yep N20 motor......
LQ9 heads. Cam and valve train? I want to wind it out and ample exhaust flow to allow big hits of N20.
Progressive n20 with a second bank of injectors fueling for better atomization... Dual channel wide band o2 with EMS operating in closed loop at all times monitoring EGT's as well as the wbo2.... This is the best way to make big power with n20 safely...
I have some other ideas like running 85% ethanol which is so cheap here I have ran it on a turbo four so dont go
because I know all about the stoichemetric afr difference etc... I just have'nt built an LSx engine..
If I want to save some money I will go with a 6.0 truck block.
I'm looking to blend street manners, MPG, Economical build and power.
Probably the truck block... Tougher? Anyway
4.0" bore 3.27" stroke. Closer to 329cu
6.3" 4340 forged rods L19 bolts. If you guys with strokers run 6" with 4" long strokes I know I can go with even longer rods .... But that is expensive and the rod ratio at 6.3 or stock LR4 is awesome as it is.
Forged pistons with offset wrist pins.. Probably wiseco.. 35psi+ N20 at 9k rpm could'nt kill them on a 4g63... Good tuning is part of it...
Oversize ARP head studs. O-ring head and block. Yep N20 motor......
LQ9 heads. Cam and valve train? I want to wind it out and ample exhaust flow to allow big hits of N20.
Progressive n20 with a second bank of injectors fueling for better atomization... Dual channel wide band o2 with EMS operating in closed loop at all times monitoring EGT's as well as the wbo2.... This is the best way to make big power with n20 safely...
I have some other ideas like running 85% ethanol which is so cheap here I have ran it on a turbo four so dont go
because I know all about the stoichemetric afr difference etc... I just have'nt built an LSx engine.. Last edited by V8_DSM_V8again; 07-20-2005 at 10:55 PM.
