Nissan 370Z Forum - View Single Post

WarmAndSCSI · 07-01-2010, 05:59 PM

Honestly unless you plan to make 700+ WHP, I wouldn't worry about getting anything larger than dual 2.5" exhaust. I've been able to pump out over 400 WHP on a single crush-bent 2.5" exhaust before.

Yes, moving to a dual 3" will make a bit of power, but it's not a requirement. And typically less exhaust restriction causes boost pressure to increase on an MBC-based or direct wastegate setup. If you were to drop the boost back down to where it was before, the gains wouldn't be nearly as significant.

07-01-2010, 05:59 PM	#6 (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	Honestly unless you plan to make 700+ WHP, I wouldn't worry about getting anything larger than dual 2.5" exhaust. I've been able to pump out over 400 WHP on a single crush-bent 2.5" exhaust before. Yes, moving to a dual 3" will make a bit of power, but it's not a requirement. And typically less exhaust restriction causes boost pressure to increase on an MBC-based or direct wastegate setup. If you were to drop the boost back down to where it was before, the gains wouldn't be nearly as significant. __________________ '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)