Nissan 370Z Forum - View Single Post - Extreme loss of power at 7100 rpm. Help needed!

SharpByCoop · 01-28-2012, 01:35 PM

I dunno. When I first bolted on the ARK Grip exhaust there was no dramatic reduction, although from a nearly flow through GTM exhaust to that, I did not feel a gain. Possibly a slight loss, but not 100 whp, and they were able to tune it back up. We did not do a back-to-back.

That said, a drop of this caliber sounds very much like a fuel cut in some form. One of the better changes I made was when I asked Sam to raise the fuel cut (RPM limiter in effect) to 7800 RPM from 7500. The car wanted that extra and it used it. He did NOT want to go this high, but I assumed all responsibility.

Got a graph?

Coop

01-28-2012, 01:35 PM	#7 (permalink)
SharpByCoop Enthusiast Member Join Date: Sep 2010 Location: Connecticut Posts: 286 Drives: '08 G37S - Graphite Rep Power: 15	I dunno. When I first bolted on the ARK Grip exhaust there was no dramatic reduction, although from a nearly flow through GTM exhaust to that, I did not feel a gain. Possibly a slight loss, but not 100 whp, and they were able to tune it back up. We did not do a back-to-back. That said, a drop of this caliber sounds very much like a fuel cut in some form. One of the better changes I made was when I asked Sam to raise the fuel cut (RPM limiter in effect) to 7800 RPM from 7500. The car wanted that extra and it used it. He did NOT want to go this high, but I assumed all responsibility. Got a graph? Coop __________________ Jim Cooper - (Retired: '08 Infiniti G37 Sport • TheShopCT built • 11.13 @ 123 mph (click for vid) • GTM Stage II Twin Turbo • 5-speed A/T Level Ten built • 591whp @17 lbs boost)