Me and pupp Dyno tunin my car, we took a lil timing out and raised the fuel pressure to get 37 more hp . (this dyno appears to be about 10% less than actual readings i should have been around 340 to the wheels with the lt4 engine but only put down 313 either way im happy with it the first pull only put down 285 and theres no way my car ran a 12.1 with 285 HP.)
I also have an automatic transmission which can take up to 20-25% of the engine horsepower which would put the engine close to 400 horsepower.
My friends gto was also about 10% off from expected numbers. we will be going on another dyno soon to find out some real numbers. i dont think it was calibrated properly or something.
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