Nissan 370Z Forum - View Single Post - Gtm 370z twin turbo transformation 548rwhp 486rwtq @ 11 psi

Phimosis · 12-12-2010, 08:14 PM

Nice setup. Getting to the point of scary though, isn't it? 11 psi on stock internals with an engine that's 11:1 compression to begin with seems like it's going to have longevity issues.

I've got 3 real questions though: 1) is that tuned for 93 octane or something even higher? Seems like you would need higher octane to prevent detonation under 11 pounds of boost while maintaining enough advance to get that kind of power. 2) the 509 whp graph is smooth where the 548 whp is rough. Is that a tune with more advance and the knock sensors are pulling some of the advance? if so, do you give the customer that tune and say, "no problem, it's safe", or do you give them the more conservative 509 whp tune? and 3) can you show us dyno's that start down at 2,500 rpm so we can see how streetable this car would be? 4k+ tells us what it will do at the track, but it would be miserable as a daily driver if the boost doesn't come on early.

12-12-2010, 08:14 PM	#42 (permalink)
Phimosis Enthusiast Member Join Date: May 2009 Location: Oildale, CA Posts: 412 Drives: 2013 911 4S Rep Power: 416	Nice setup. Getting to the point of scary though, isn't it? 11 psi on stock internals with an engine that's 11:1 compression to begin with seems like it's going to have longevity issues. I've got 3 real questions though: 1) is that tuned for 93 octane or something even higher? Seems like you would need higher octane to prevent detonation under 11 pounds of boost while maintaining enough advance to get that kind of power. 2) the 509 whp graph is smooth where the 548 whp is rough. Is that a tune with more advance and the knock sensors are pulling some of the advance? if so, do you give the customer that tune and say, "no problem, it's safe", or do you give them the more conservative 509 whp tune? and 3) can you show us dyno's that start down at 2,500 rpm so we can see how streetable this car would be? 4k+ tells us what it will do at the track, but it would be miserable as a daily driver if the boost doesn't come on early. Last edited by Phimosis; 12-12-2010 at 08:18 PM.