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BigCars4Ever
11-12-2015, 08:20 PM
So my mind has been awanderin lately and I was thinking of reliable ways to create vacuum for a boosted motor. I did some research and concluded that a belt driven pump is the best way to ensure vacuum for the PCV system and the brake booster but there is really doesn't seem to be room to add another accessory to the drive belt especially after you just added a supercharger. A lot of turbo charged cars and trucks come from the factory with vacuum pumps and they do something pretty clever. They mount the pump to the back of the alternator. I'm thinking there is a winter project for me to tinker with! Alternators for a crown vic are cheap at the junk yard and a vacuum pump from a Sprinter Diesel truck can be had brand new for $120 and used for about $50. Way cheaper than the $400+ for a Moroso or equivalent. Comments or Suggestions?
justbob
11-12-2015, 09:30 PM
Why do you think a S/C car suffers from loss of vacuum? The storage box does plenty fine as I've never once had a hard brake pedal. In fact I know of at least one member who deleted the box altogether and has no issues whatsoever. I've never heard of complaints of a stiff pedal at the track and surely you would holding boost longer there than on the street.

Last I knew CV alternators were different also.

Now if you were looking into this to address high lift long duration cams I understand. The cams I had netted me around 11-13 tops for vacuum. Even driving slow my BPV was fluttering open/close.


Builder Of Badassery
Fastbob
11-13-2015, 06:21 AM
How about an electric vacuum pump off of a late model F150- Ecoboost?
MOTOWN
11-13-2015, 01:39 PM
Honestly there is absolutely no reason for a vacuum pump on a Marauder, even with a very aggressive S/C.
BigM460
11-13-2015, 04:38 PM
I thought he was wanting a vacuum pump to pull vacuum on the crankcase?
Maybe not. I've wondered if crankcase vacuum would help with mines valve seals. She smokes every time it's started here lately.
MOTOWN
11-13-2015, 04:59 PM
I thought he was wanting a vacuum pump to pull vacuum on the crankcase?
Maybe not. I've wondered if crankcase vacuum would help with mines valve seals. She smokes every time it's started here lately.

He is , the only thing that will fix yours is removing the heads , and a trip to the machine shop.
Triple Threat
11-13-2015, 05:08 PM
Honestly there is absolutely no reason for a vacuum pump on a Marauder, even with a very aggressive S/C.

I agree. I run with 24# of boost with Bullet cams with no vacuum pump.
babbage
11-14-2015, 01:48 PM
I thought he was wanting a vacuum pump to pull vacuum on the crankcase?

Maybe not. I've wondered if crankcase vacuum would help with mines valve seals. She smokes every time it's started here lately.


You could try Auto-rx (google it) to clean and recondition the valve seals. This worked for me.
BigCars4Ever
11-14-2015, 07:11 PM
It's more about not pulling oil vapor laden air through the supergharger. I've seen the inside of my intake manifold and really would like to avoid that kind of buildup on the procharger I want to install. I'm sure it can't be good for the impeller. I thought about an exhaust draft system after the cats but I heard they don't generate much vacuum at idle.
MOTOWN
11-14-2015, 07:20 PM
It's more about not pulling oil vapor laden air through the supergharger. I've seen the inside of my intake manifold and really would like to avoid that kind of buildup on the procharger I want to install. I'm sure it can't be good for the impeller. I thought about an exhaust draft system after the cats but I heard they don't generate much vacuum at idle.

Get a good catch can like a Draft 42 design ultimate can , pricey but they work!:coolman:
justbob
11-14-2015, 09:55 PM
Or delete it altogether with breathers. I did just that but got horrible oil vapors in the cabin when using the climate control so I ended up mounting a two port breather tank up front and down low. Worked perfect and zero oil re entering the engine.

Both sides run to the tank individually.
http://images.tapatalk-cdn.com/15/11/14/af64ea432bc506d4ec4153a07a0410 05.jpg
http://images.tapatalk-cdn.com/15/11/14/1bc8eb9131cd868e40b26859892aeb cc.jpg


Builder Of Badassery
Marauderjack
11-15-2015, 03:12 AM
It's more about not pulling oil vapor laden air through the supergharger. I've seen the inside of my intake manifold and really would like to avoid that kind of buildup on the procharger I want to install. I'm sure it can't be good for the impeller. I thought about an exhaust draft system after the cats but I heard they don't generate much vacuum at idle.

How are you getting blowby vapor on the ProCharger impeller??:confused:
BigCars4Ever
11-17-2015, 04:45 PM
I thought that to keep vacuum at all times I would need to be on the intake side of the charger.
lifespeed
11-17-2015, 09:15 PM
You could try Auto-rx (google it) to clean and recondition the valve seals. This worked for me.

Mechanic in a bottle! :D
chief455
11-17-2015, 09:54 PM
Ran this set up on my last Pontiac build. Eliminated oil entering the crankcase/manifold, and blowing by the exhaust seals under deceleration after a 1/4 mile pass.
pricey but the right way to seriously evacuate oil from the egine.

http://www.dragzine.com/tech-stories/engine/tech-how-external-vacuum-pumps-free-up-horsepower/