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streetzlegend · 09-15-2007, 04:25 PM

I dont understand something though. My previous dyno at 7psi, the TQ peak was at 4400 RPM, and now my TQ peak is at 5.2k'ish. I dont understand what could have shifted the torque curve to the right. I have done the following, put header wrap on the charge pipe, put header wrap on the exhaust (excluding ypipe, everything else, catback).

Could it be the way im controlling my wastegate, I have it completely closed when below 10psi, as it gets close to 10psi it starts opening up. Before at 7psi, i just had a manual one that was set at 10psi all the time. Maybe having it closed completely while spooling up is causing a bit of loss in TQ and shifting of the curve? Also, the tq at 7psi was higher than hp, now its opposite.

09-15-2007, 04:25 PM	#5
streetzlegend Senior Member 97 Maxima Auto Join Date: Dec 2003 iTrader: (3) Posts: 1,851	I dont understand something though. My previous dyno at 7psi, the TQ peak was at 4400 RPM, and now my TQ peak is at 5.2k'ish. I dont understand what could have shifted the torque curve to the right. I have done the following, put header wrap on the charge pipe, put header wrap on the exhaust (excluding ypipe, everything else, catback). Could it be the way im controlling my wastegate, I have it completely closed when below 10psi, as it gets close to 10psi it starts opening up. Before at 7psi, i just had a manual one that was set at 10psi all the time. Maybe having it closed completely while spooling up is causing a bit of loss in TQ and shifting of the curve? Also, the tq at 7psi was higher than hp, now its opposite. __________________ Currently Under construction check my progress so far http://forums.maxima.org/supercharge...-new-post.html Auto, TO4b(10psi), 2.1 60' 8.6@82 1/8th , 312WHP/301WTQ[/b]