stock flywheel, stage 1 clutch everything in my sig is what I have, and it was a fourth gear pull, and no other car had freakishly high numbers so I dont think it was not calibrated correctly.

 

didnt you know them k&n filters ad 20 rwhp.... theres no way a O/R pipe added 30 rwhp, what kind of dyno was it

 

254.1 rwhp = about 300 hp from the engine.
This is a GT? Something is wrong here...

 

its called add 30 motorsports dyno..they add 30hp to ur numbers.

 

every car is different...

 

it was a dynojet, and cars can vary alot in HP from the factory, theres probably a 10 hp leeway, and you said cars with full exhaust and a t/b and plenum will run 260, well t/b and plenums only add around 5 hp so that means 260-5=255

 

Then why was my car the only car that it added 30 hp too, as soon as we get the numbers for all of the cars posted on our car club forum ill post it on here, every other car that got dynoed today dynoed at what they were supposed to, and even if your right about that 30 hp thing that would mean the other 2 gt's would be at 200 hp which makes absolutly no sense.

 

so why did the other 2 gts with exhaust dyno 25rwhp less than you?

 

I've heard about "happy" dyno's on dyno days before.

Take it to a second shop...

The problem isn't the exhaust, it's the intake...

 

I dyno'd 250 RWHP and 296 TQ on my car without squeezing the bottle, and this was with a nitrous tune still in place. All I had done was full exhaust and a K&N. I then ran 297 RWHP and 376 TQ with a wet 75 shot and a very safe tune. I don't see the problems with those numbers.