If you made 264whp on a Dynojet Id be questioning things, but since Mustang Dynos can be calibrated to ready very low, it may be fine. However, I think your best bet is to visit a track and see track times. That will tell you how fast the car is.

 

264 is pretty good without cams and your list of mods... get some cams and meth then tune it. it will be a completely different car and you will probably put down atleast 100 more hp to the wheels.

 

Not saying anything bad about 1389evo but i had my car on the same dyno as he did and all i have done is tbe, clutch, utec, intake and i made 288. and he has quite a few more mods then me so he should have more power.

 

HTP did the tuning? Down on power could mean bad boost leak, crappy plugs, boost too low.. etc

 

no htp hasnt tuned it just yet...but when they do i do expect more them guys know what they are doing! but i havent got my car on the mustang dyno yet i got it dynoed at rons at axis motors in illinois