What was your trap speed?

Going from the top time for a stock car in the 1/4 times thread (12.938@108.31) and the curb weight of a base sport (3232lbs), the LRT calculator for getting hp from mph and weight spits out 331 hp. The other two methods are described in the article as being less accurate. That's why I posted the specific formula for the one that was closest- hp = (mph / 215.39)3.3135 x weight (lbs)

106.5 and that was stock air box so I guess 275hp back then.

So just a cat back?

The formula feeds you crank hp, so you would need to add back in the drivetrain losses to your numbers.. I checked it against times in the 1/4 mile thread and it was close.

CBE wheels and weight.

I thought we were all showing SAE which is why my numbers are lower, but here is STD. My SAE numbers are in my sig.

*** Mods ***
Weather: 86f and 30% humidity
FI CBE 18"
Stillen G3
MD ART
UpRev

http://www.the370z.com/members/mag_b...t-dyno-std.jpg

Just got it Dyno the numbers came out lower then I wanted, feel it should have been higher. The day was overcast and high humidity 300 whp and 275 torque
Mods; Stillen G3 CAI / Berk Test Pipes / Stillen CBE
http://www.the370z.com/members/madur...img-1519-1.jpg

How much will Stillen Longtube Intakes/Stillen Headers/Stillen HFC/F.I. CBE/Stillen Pulley/UpRev/Dyno Tune put down?

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Stillen headers are shorties and make no power. They're a waste of labor. Either long tubes or stock manifolds if you want power.

Stillen stated that with their headers+hfc combo added with thier pulley and exhaust you should achieve 320-340whp with a decent tuner. I already have a full cbe and gen 3 longtube intake......I would add an uprev tune.

Think its possible?

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They are the only ones to have success with their headers.

As in their personal car? No one else?

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Some people here have tried them. The only people who have shown a power gain with shorty headers are the same people selling the headers.

No tune? I wouldn't expect that much you got without a tune. With a tune its probably a little low.

One person I've seen if you think under 5 hp and tq is worth it.

Under 5hp and a lot of labor costs.