Re: to vacuum pump, or not to vacuum pump, that is the question?
I put my pump on 5 years ago and the car picked up 1.5 MPH with the rings I had been running without the pump on gas. I gas ported and used a low tension ring and put the moter on alcohol and it picked up 23 HP more than without the pump and the old ring package on gas. So I don't see where I have waisted my money at all. It also has no water in the valve covers when you pull them off where as before the water in the valvecovers was bad even on gas. (I live in a high humidity area so this does not help) So what I am saying is, I would not run a car on either fuel without one but that is just me.
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Mike Hedger S/C 4646
MPH Racing and Fabrication
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