[Formulajones]

Like I mentioned earlier, the only guys I know using an electric vacuum pump for crankcase evac are the FAST racers where everything has to appear stock. But if you ever hear the pumps those guys use, they are pretty loud, and probably has to be a pretty decent size electric motor to even pull 10-12 inches. Plus they generally only flip them on right before the pass, they don't use them idling around because that much vacuum pull would cause other issues at idle and low rpm. Too much and you're pulling oil off the rings.

I tend to think you would need a variable speed electric vacuum pump if it's something you plan to use all the time on the street. Never seen one used in that application. That's where a mechanical belt driven vacuum pump is a better fit.

Here's an example of Joel in his hemi belvedere. At 1:48 he flips a switch before launching the car and you can hear what sounds like a little weed whacker. That's the electric vacuum pump.

F.A.S.T. guys are still doing this today.

https://youtu.be/nKfPiVjUdjU