so i had the car dyno'd at speed inc in schaumburg saturday morning. 55 degrees out. auto - gm stage kit. on the street, when i floor it, it will hit 20 - 22 lbs of boost. on the dyno, it only hit 15. what gives.
when i drove it home, i got off the expressway, on when i exited the off ramp, i nailed it & it hit 20lbs. it only dyno'd 205hp at the wheel.

 

https://www.chevyhhr.net/forums/show...ght=trick+dyno

 

What kind of dyno do they have?? If its a Mustang than dont be upset they always read low

 

Mustangs and Dyno Dynamics read much closer to what you calculate at the track based on trap speeds and vehicle weight.

 

True that as long as its loaded correctly. But i know the shop he went to and the guys there are tools

 

A Dynojet does not load the drivetrain the same way as the car would see in the real world. Less load, less exhaust pressure driving the turbine. In any event, boost is the measure of air that didn't make it into the engine and is highly overrated as a yardstick of performance. I wish these cars didn't have the stupid "bewst" gauge.