Here are my results for just the Tomei Expreme TI. I am still on the stock headers, y-pipe, and catalytic converters on 91 octane. AFR's were still rich on the top end.

Car: 08 Nismo 350z (VQ35HR)

Mods

Exhaust: Tomei Expreme TI (rear section only),

Drivetrain: SouthBend Stage 2 Daily clutch, SouthBend Race steel flywheel, Zspeed HD CSC, Wilwood Master Cylinder

Dyno: Dynapack

Results:

WHP-268.5

Torque-239 ft/lbs

Dyno Sheets:







Videos:

 

Minimal difference, no meaning to evalutate, can be dyno tollerance also.
But max power on 6400 rpm only ?

 

when I see modded/tuned H.R's do that^^^^ A 100% stock H.R pulls top H.P. right up to 7,500 rpm.

 

numbers are about what he should expect, but the curve does die after 6400.... i dont think he is tuned either, think he did this as the start of build thread maybe?!?!

** after reading the post again, i gather he just swapped the exhaust (am i right) and you might hit higher with 93 octane gas

 

I think dynapacks read lower

 

I think so if not really strange...
In my dyno (on almost stock HR with Uprev tune) max power is at about 7400-7500 rpm.

Ok, my result numbers were orrible, because dyno was not out of setting and no forced induction of air, but at that rpm...