Nissan 370Z Forum - View Single Post - Fast Intentions Stage 2 TT build by MA-Motorsports.

Spooler · 07-13-2021, 11:42 AM

I wish I would have drilled/tapped the exhaust manifolds so I could check drive pressures on each turbo. I feel like I am flying blind trying to figure out where the turbo's are maxing out and if backpressure is becoming an issue. One mistake in this area can cost me a headgasket. Ideally you want no more than a 1:1 ratio. 30psi of boost/30 psi of drive pressure. This will tell you where the turbo's exhaust side is becoming a restriction. The only problem is this may cause the exhaust manifold to crack unless they were cast with a bung area to install it.

07-13-2021, 11:42 AM	#3996 (permalink)
Spooler A True Z Fanatic Join Date: Jun 2014 Location: Ga Posts: 13,791 Drives: 2013 Nismo 370z Rep Power: 2684392	I wish I would have drilled/tapped the exhaust manifolds so I could check drive pressures on each turbo. I feel like I am flying blind trying to figure out where the turbo's are maxing out and if backpressure is becoming an issue. One mistake in this area can cost me a headgasket. Ideally you want no more than a 1:1 ratio. 30psi of boost/30 psi of drive pressure. This will tell you where the turbo's exhaust side is becoming a restriction. The only problem is this may cause the exhaust manifold to crack unless they were cast with a bung area to install it. Last edited by Spooler; 07-13-2021 at 11:45 AM.