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Is there a rule of thumb for horsepower gains for boost and timing, for instance. 1 lb. of more boost equals "X" horsepower, from 10 lbs to 11 lbs. 1 degree of more timing equals "X" horsepower, let's say 17 to 18 degrees. This assumes no issues with A/F or Knock. Just curious to...

Wow, the owner of Maryland Speed cares about his customers. Best prices on the net.

Looking for bigger throttle body suggestions, 80mm pulley, Roush TVS, looking to max air flow on 93 octane. Will be adding open air box, headers and injectors shortly.

Any details on when the Roush software update will be released for the phase 2 automatic cars? I'm getting a little board with the P061b code error throwing my car into limp mode.