Would there be a power benefit from using an electric vacuum pump on a non boosted motor? What about a high compression motor? like 10:1+?

I was reading in "Engine Masters" magazine they were talking about how they gained 20hp from adding a vacuum pump to their big **** motor, but it wasnt boosted.

Just wondering because I can retro fit a vacuum pump from a taurus which had an electric pump into my setup with ease, but dont want to do it if there isnt a benefit.

 

Your not going to gain anything on a stock type motor. You really only need vacuum pumps to help seal low tension piston rings and keep a pressure buildup below the rings from forming.

 

ok here is a question for laughs.

if I took my airpump off my mazda hooked it up to my high mileage honda through the crank case vent would it maybe help seal the worn rings a little better?
would it give any difference maybe in gas mileage?

 

How does a vacuum pump seal rings better?

My take...more pressure on top of the rings would cause them to expand and seal, pulling vacuum (I assume from the crankcase) would cause the rings to "pull in" to the lands.

Any thoughts? Or am I missng the obvious?

 

something to do with a pressure differential.

higher pressure up top with the same pressure down low means a higher pressure differential between the two.
or you take the same pressure on top and lower the pressure on the bottom you get the same effects of a higher pressure differential.

 

That makes sense, more pressure on top, better seal, decrease the pressure below, does the same thing I guess.