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Old 03-15-2010, 10:55 AM   #31 (permalink)
370Zsteve
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Quote:
Originally Posted by RCZ View Post
It completely depends on the dyno, I could go on a dynapak right now and make 350rwhp easy. They read so high. Dynojets read a bit high too, I'm probably at like 330whp on a dynojet. The dyno I used (Mustangdyne) reads more accurately when you consider the whp/weight vs. performance figures (performance seems to match what you would expect 310whp/3300lbs to do). If I were to dyno on a dynodynamics I would probably put down 300 or less because those read low.

So you have to know which dyno you are talking about. This is my rule of thumb:

Dynapak: +15%
Dynojet: +10%
Mustang: 0 (base)
Land&Sea: 0
DynoDynamics: -5%
I'd pretty much agree with those numbers. factor in temp, humidity, air pressure and there is even more variance. Makes me feel good that my car in stock trim pulled 278.5 on a Dyno Dynamics, proper break-in ftw.
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