so i got my car dynoed at the stillen meet this last weekend...i didnt know what numbers to expect it was 91 degrees out with 19% humidity my best pull was 247 rwhp and 233 rwtq......it was higher than i thought it was anyone else see numbers like this with similar mods?

 

What kind of dyno?

How was it calibrated?

Do you have any runs from other people to compare with that have dynoed on other dynos?

 

it was a dyno jet there was an 06 g35 6 m/t all stock put 228rwhp i forget the tq....a twin turbo g35 sleeved fully built boosting 20 on 91 pump gas that put 540 rwhp, he was expecting 600 he said, but as far as calibration i have no idea how it was calibrated

 

^from 300BHP to only 228rwhp?

 

thats correct

 

You can only compare your results to those who also dyno'd there cars on the same event.

Those numbers are not bad if a stock 06 6MT (revup) posted up the numbers you stated.

.

 

Wow and I made 538 on 91 at only 13psi. Sounds like something missing there.

 

Why do these cars have a huge drivetrain loss? We lose almost 80 HP from BHP to WHP.. what gives?

To the OP.. Those are very good dyno numbers.. I have more performance mods than you and I dyno less hp and tq. Maybe because you're 6mt though.. who knows?

 

yeah mostlikely...but it can be the dyno too, who knows!

 

How is that even possible with a motor rated at 298hp?! Thats a 23-24% driveline loss. Even an automatic shouldn't be that bad. My Grand Prix GTP was FWD and automatic and it was only 20% loss. RWD and manual should NOT be nearly that bad.

 

I think everyone else has made the point, but "it depends" on a number of factors both within and outside your control. The most important thing is making consistent power throughout the band with a good fuel mixture, not what your peak numbers are.

My slightly modified 2004 G35X (Osiris tuned, Motordyne 5/16" on the intake, HKS Sport exhaust) put down more power on a Mustang than the mechanics at my shop expected in February - 250.2 hp and 262.8 ft-lbs at the wheels. If you use the old rule of thumb of 23% minimum driveline loss to AWD, the lowest numbers come out to 308 hp and 323 ft-lbs torque at the crank.

The shop caters to young professionals with German cars and too much money on their hands, but is well respected in the BMW CCA circles for accurate dyno runs. Trust me, these guys were both amazed and irked that any non-turbo Japanese sedan turned out numbers even remotely close to an E46 M3.

Do I believe it? Sure, the car pulls as hard as a previous car that was measured many times at 320 hp / 350 ft-lbs at the crank. I also have the horrible fuel economy to back up that feeling (15-16mpg around town on Chevron 93).

Do I really care? Nope. I had the car in there for a speedometer calibration check originally (not a ticket, long story..) and decided to check the power on a hunch.

Just drive on and enjoy the ride...

-DM