Has anyone ever used the engine driven Vacuum pumps, or electric?

My buddy took a engine down to a shop to get it dynoed for a guy. While setting everything up they got to talking and the owner/dyno operator (engine dyno) said he has seen up to 90FWHP gain with a engine driven Vac pump on BBC's..
Said he wanted to test one on a LS engine but hasnt yet.



Got me to wondering since ive never seen anybody on here run one. Seems if you could pull even .5# vac on the crankcase when WOT it would prolly make a difference?

 

I know some race car guys who do it, but couldnt say its going to make a huge gain for you. Did he say how much power the bbcs where making? hell some make 3000 hp so in percentage 90 isnt much haha

 

yea i know and didnt think to ask, but he said up to 90hp
but thats 90 more than it had ha!

 

I have been looking high and low for a vacuum pump that will work for me but unsure on which one will work and fit where I need it to fit. Only place for me is on the passenger side head. The pump im looking at is the gto kit from GZ Motorsports. I am needing it for crankcase evacuation as I am running boost. But like you said I have heard an increase in power is made because of the better seal on the rings.

 

On my buddy's 505 bbc, we hooked up a shop vac to help pull some vacuum and gained like 6rwhp or something like that. It was awesome





I wanted to hook up a cheap electric pump on mine when I had the nitrous on it. A lot guys used to do it and still do. like off a ford diesel or something like that

 

hit up a junk yard for a wrecked wrx or s2000 and get the pump of those.

 

The PCV system is a vacuum pump of sorts, probably more so if you plug the passenger side valve cover. Seems like it could be harmful to the seals?

 

I figured 1 psi vacuum would be the ticket.. too much you might start sucking air past the seals?


If you plugged the passenger side and WOT your not gonna have too much vacuum, but at idle your gonna have alot

 

90hp is more than some cam swaps !

 

The vacuum pump works, whether it is electric or driven. Guys been using them for a bit on V twin harley set ups. I was actually thinking at some point to run a set to the headers on my truck, to draw CCP out. so yes I can believe the gains.