Quote:
Originally Posted by Reelgrinder
Was wondering does 3.91 gears make your dyno read higher or lower?
Also
I have seem to have lost some HP?
I was making 615 on a mustang dyno last Nov with 10 to 11 psi on the eforce.
I since have done 3.91 gears and the tuner says I'm down to 8 psi IATs read same about 140. out side temp on last years run was 58 deg. Last week it 70 deg.
Belt isn't slipping
Compression is fine
Where could I be loosing 3 psi?
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Gears should have no affect on dyno numbers unless your spinning your tires which will affect numbers for sure.
What pulley combo are you running?
Ted.