OP dont worry the shop that i did my base line/ tune has a mustang dyno and i ws heartbroken the first time i did a pull.
1st pull-test pipes,MDspacer, headers(not worth money),broke y-pipe= 215
2nd pull after orzirus flash= 225
ran 14.2 in a 1/4 mile after tune
3rd pull with custom plenum but oem y-pipe= 233

 

Completely incorrect.

 

That's weird? I bet the dyno wasn't calibrated properly. My 03 dynoed at 230rwhp stock and is making 261rwhp today with a custom accessport tune. I also ran a 13.6@102mph after the tune on the dyno. It ran 14.1@99mph both at the track and dyno before the tune.

 

really? wouldn't the torque converter rob a bit more power as opposed to 6MT?

 

Hey Caketech

you need to find out if they have a live weather station for that dyno?

i got a G35 aswell on the mustang dyno that we have it has a weather station which gives you diffrent reading acording to the weather.

with out WCF ( weather condition factor ) my car shows about the same
but with the WCF i get around 220RWHP

 

I just had my G Tuned on a Mustang Dyno. It was definitely the heart breaker.

The numbers are 225rwhp and 200rwtq. It was 81 degree with high humidity that day... Not impressive number but most importantly it's tuned for better drivability for a DD...

Here's a video of the session. I'm running the Motordyne Dual Gamma in this one.

 

Swirling automatic tranny fluid should DEFINITELY take up more power.

I put down 273 rwhp on a Dyno Dynamics in a Mustang shop. Does that count?