Nissan 370Z Forum - View Single Post

WarmAndSCSI · 08-12-2010, 08:30 PM

Do you plan to rebuild again before boosting it? 12.5:1 CR plus any significant amount of boost is not achievable without race gas. It may work with little or no detonation, but I wouldn't trust it.

I'm honestly not sure you'd want to waste that much money building an engine to N/A specs that will be completely nullified once you boost it. Piston ring end gaps will have to change, piston-to-cylinder-wall clearance will have to loosen (a bunch if you're running 2618 alloy pistons, and you'll probably want to drop the compression ratio to 10:1-ish in the end.

The gains of building a VHR for N/A power probably aren't substantial enough to justify the cost. It's amazing how efficient this engine is right out of the box - without making it undriveable on the street, I cannot imagine squeezing more than 340 WHP out of it.

Just my $0.02 based upon what I've worked on before.

08-12-2010, 08:30 PM	#5 (permalink)
WarmAndSCSI A True Z Fanatic Join Date: May 2010 Location: SLC, UT Posts: 1,671 Drives: '08 Evo X \| '10 370Z Rep Power: 18	Do you plan to rebuild again before boosting it? 12.5:1 CR plus any significant amount of boost is not achievable without race gas. It may work with little or no detonation, but I wouldn't trust it. I'm honestly not sure you'd want to waste that much money building an engine to N/A specs that will be completely nullified once you boost it. Piston ring end gaps will have to change, piston-to-cylinder-wall clearance will have to loosen (a bunch if you're running 2618 alloy pistons, and you'll probably want to drop the compression ratio to 10:1-ish in the end. The gains of building a VHR for N/A power probably aren't substantial enough to justify the cost. It's amazing how efficient this engine is right out of the box - without making it undriveable on the street, I cannot imagine squeezing more than 340 WHP out of it. Just my $0.02 based upon what I've worked on before. __________________ '10 PW 370Z 7AT - wife's car - Project Raspberry Cheesecake '08 Evo X - built motor+trans \| BB-X @ 32 psi \| CH3OH \| self-built+tuned - ??? WHP '01 Galant V6 - built motor \| GT35R \| self-built+tuned - 550+ WHP (retired)