Quote:
Originally Posted by 370ZilverZ
A mustang dyno is what I had mine tuned and got 275 whp and it runs really well. There has always been a large difference between a Mustang and DynoJet. His car on a DynoJet would show 300-310 whp just like mine would show 310-320 easily. That's why most people look for the DynoJet to get the numbers. I just look for a good curve and the peaks where I use it. You can feel if the power is there. My last car was pushing 550 whp on the DynoJet. His chart looks good, but I think some better tuning could be done to smooth out that torque curve.
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If that is the case the numbers should be similar to yours. He has stillen headers, but no pulley. It could be the extreme heat out there as well. I generally measure a mustang do as 6-8% lower than dynojets. It's just a rule of thumb for me. I do feel though if the OP has the means to reverify the tune and dyno.