Quote:
Originally Posted by CypriniousM
I just want to know if the Crawford power blocks really make the gains that they say they do. Seems crazy for 2 hunks of metal to give the car gains like that.
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The blocks change the length of the intake manifold thus effecting its VE. It does make a little power but its mostly moving the power band to a lower rpm. So lets say you were making peak of 180hp at 7000 rpm, with the blocks you would be making 180hp at 6400 rpm or so. This happens across most of the power band, a shift of the same power but at lower RPMs. So the power is in a more usable area. One kind of compromise is you will fall of the power band sooner but, with a tune that can be fixed.
There is a few good dyno charts of it on here.