I logged my runs tonight against that nitrous mustang, and I'm definitely seeing a boost drop as RPMs climb. This S475 is rated to 950hp, and the MAF sensor is maxed out at like 87 lb/min (for reasons I have yet to figure out). So the turbo is working hard for sure. If I'm at the turbo's max already, that means the truck should be putting down like 750 at the wheels assuming a 20% drivetrain loss. I don't run enough timing to be making that much power yet, but does that number seem insane to anybody? Kind of scary/exciting to think that all I'd need to do is run more timing and put down 750...

 

What mph are you trapping in the 1/4 MI? A S475 should be good for at least mid to high 120's @~5000lbs. A T6 S475 with the 96mm exh wheel should be 130+MPH at max output.

 

Haven't taken it to the track yet. I will be dynoing it next weekend though. It has the 83mm turbine wheel.

 

Whats the exhaust A/R?

 

1.10 t6

 

waiting to hear results of the track.

 

Are you still only running 10psi?

 

is your WG dumped or routed back into the exhaust?

 

Yeah, still on 10psi. Drops to around 9 after RPMs climb. WG is routed back into exhaust, its a KB kit.

 

No way you should be close to maxing at 10psi. Turn that thing up man! Should be good for 16-18psi.