crank case evac pump

myclone

myclone

Donating Member
Yep, thats a rear diff oil circulation pump used to run the rear diff oil through a cooler(s). Its designed to be ran in an oil bath enviroment which means it would prolly seize or burn up from lack of lube if used as a evac pump. Looks to be a good price on it though at a 100 bucks.

There are plenty of evac systems out there that would work better IMO from the junk yard GM small smog pump all the way up to the high zoot billet thingies that cost big bucks.
 
canadian

canadian

sy in progress
I have a gm electric smog pump, but after reading those articles, I'm not sure it'll be able to last. Might try scouring ebay for one of the other style pumps listed.
 
MotorMouth

MotorMouth

Member
Could you use the GM pump and pull it through a seperator with a filter to keep some of the oil and moisture out of the pump itself? Using the pump was a thought I had because I still have the smog pump off of my 97 camaro.

Brian
 
canadian

canadian

sy in progress
pricing? moroso seems to be around $300, there's a custom one made out of a ford air pump for $565.
 
J

just a 6

R.I.P MyClone
I was thinking the same thing, i think it should work. We could also use one of those white funky filters that are installed in a OEM air cleaner housing. To keep as much oil as possible from enter a air design vacuum pump to keep it alive as long as possible.

MotorMouth said:
Could you use the GM pump and pull it through a seperator with a filter to keep some of the oil and moisture out of the pump itself? Using the pump was a thought I had because I still have the smog pump off of my 97 camaro.

Brian
Click to expand...
 
0-60N4

0-60N4

Member
I talked to the Speeddemon guy and he kinda back out of recommending either of his pumps for this application.

I ended up going with the Moros exhaust evacuator system. Nice set up and easy to install. Pulls a good vacuum at idle. Don't know how to check it at high rpm and full engine load but I guess works good then also. I still have one PCV valve connected to the throttle body. Don't know if I'l keep it there or remove it.
 
canadian

canadian

sy in progress
the one site i was reading recommended putting a vacuum gauge on the valve cover and watching it while under high load.
 
BigAl...

BigAl...

Member
I tried the GM vacuum pump it only lasted 1 day :x . The problem is not the oil it's the temp of the air coming out of the engine. it is way to hot. I had an oil seperator.

I've spoken with the guys at Moroso and they said "there is no such thing as a mechanical vac pump that will live on the street" he went on to explain that the apex seals in the pump would over heat from running longer than they were designed to.

BigAl...
 
InvisiBill

InvisiBill

Active member
I thought someone here did the "header" setup on their truck. They added a little pipe on the downpipe to act as a nipple, and ran a hose to the valve cover. It seems like that would be the simplest way to do things. Is that safe though? It just doesn't seem right to have your exhaust hooked to your valve covers...
 
MotorMouth

MotorMouth

Member
I guess the other option would be to use the moroso cranke case evac and just weld the fittings into the exhaust, not sure if that would work good for the street.

Brain
 
0-60N4

0-60N4

Member
That's what I did. That is the Moroso exhaust evacuation system as explained in one of the links above. Summit sells them.
 
canadian

canadian

sy in progress
InvisiBill said:
I thought someone here did the "header" setup on their truck. They added a little pipe on the downpipe to act as a nipple, and ran a hose to the valve cover. It seems like that would be the simplest way to do things. Is that safe though? It just doesn't seem right to have your exhaust hooked to your valve covers...
Click to expand...

i believe the idea behind it is that the exhaust gas flowing inside the downpipe blows across the opening and creates a low pressure area thus sucking the fumes out of the valve cover. kinda like if you blow across the top of a straw you can draw liquid up throuh it.

there was a discussion a while ago about the pros/cons to this setup. i believe it was green who brought up the point of too much pressure in the exhaust actually pushing fumes back into the valve cover. without having a vacuum gauge on the line you wouldn't know for sure.
 
Tydriver

Tydriver

TurboLS6 Powa'
MotorMouth said:
Could you use the GM pump and pull it through a seperator with a filter to keep some of the oil and moisture out of the pump itself? Using the pump was a thought I had because I still have the smog pump off of my 97 camaro.

Brian
Click to expand...

My thought was similar to this, then I decided to run a line in front of the compressor section of the turbo between the turbo and filter just as GM did.

With one small difference, I want to acquire some sort of an air/oil separator like whats shown in those links. This will allow me to use the best vacuum pump that ever was made (TURBOCHARGER) not have to sweat it taking a dump or dying and also eliminate the possibility of oil making it to the compressor like on the stock setup.

Has anyone tried this yet ? (other than GM I mean) with the separator to verify if it works ?
 
ed hess

ed hess

race or get outta the way
the 2nd article posted above said the pro stock cars use electric vac pumps.

What i want to know is whose electric pump are they using?

ed
 
You must log in or register to reply here.
Top