Anyone running a vacuum pump??
FormerVendor
Joined: Dec 2001
Posts: 2,444
Likes: 2
From: WWW.SPEEDINC.COM
I bought a system from Star machine. It's on the car but I've not tried it yet. (still need to finish a few things and break in the motor).
http://www.starvacuumpumps.com/catalog.php?cat=1
http://www.starvacuumpumps.com/catalog.php?cat=1
FormerVendor
Joined: Dec 2001
Posts: 2,444
Likes: 2
From: WWW.SPEEDINC.COM
Well, the pump, bracket, drive mandrel, belt, hoses, fittings, and oil seperator ended up around 1400. I'm sure you could get it done cheaper, but I went this route because these were the best parts (IMO) that I could find.
Any engine will end up with some pressure in the crankcase. Since forced induction or nitrous cars have more cylinder pressure, they can have more blowby past the rings than N/A. More crankcase pressure equals more frictional pumping losses. Of course this problem increases with higher rpm. Vacuum pumps free up horsepower, but they require a small amount to operate. The big question is whether the added complexity is worth what will probably be a very small HP increase at reasonable street rpms. 7000 or 8000 rpm strip motors definitely benefit quite a bit.
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Originally Posted by 69vette
what is the idea behind reunning a vacuume pump on a turbo car? Sorry for the dumb question.
Last edited by stoleit; Aug 18, 2005 at 01:14 AM.
I didnt know either. I was thinkin maybe to stop easier or somehting lol. Not for nothign but doesnt jsut puttin a big *** breather on ya valve covers do the same? Where does all this pressure buildd up from? Unless ya have a significant blowby shouldnt there be not alot of pressure? GL
John
John
TECH Resident
Joined: Jun 2004
Posts: 840
Likes: 0
http://www.hotrod.com/techarticles/0304_381/index1.html
Lower buck models
http://www.gzmotorsports.com/vacuum-pump-guide.html
http://www.gzmotorsports.com/vacuum-pumps.html
On my
I have a GZ. The AC tensioner is a ribbed pulley so I just drove another pulley off of that and came up with the right rate as if I could have actually of fit a mandrel in there.. Not enough room..
On turbo cars use the adjustable relief valve and oversize or spin the pump a touch faster... This way it can maintain 15inches even under boost yet never exceed it.
On a V8 suck from one VC and put the valve on the other. On the 4g63 I pull from the oiginal breather and threaded the relief valve into the PCVs spot on the cam cover.
Lower buck models
http://www.gzmotorsports.com/vacuum-pump-guide.html
http://www.gzmotorsports.com/vacuum-pumps.html
On my
I have a GZ. The AC tensioner is a ribbed pulley so I just drove another pulley off of that and came up with the right rate as if I could have actually of fit a mandrel in there.. Not enough room..On turbo cars use the adjustable relief valve and oversize or spin the pump a touch faster... This way it can maintain 15inches even under boost yet never exceed it.
On a V8 suck from one VC and put the valve on the other. On the 4g63 I pull from the oiginal breather and threaded the relief valve into the PCVs spot on the cam cover.
Last edited by V8_DSM_V8again; Aug 18, 2005 at 07:19 AM.
Originally Posted by red90cobra
where exactly do you suck all this vacumm from?
Some of us use the Z06 valley cover with the PCV fitting on it. I have that hooked to a fitting on the turbo inlet so that under boost the turbo sucks pressure from the case and I have breathers on each valve cover also. I do not get any oil in the turbo and it seems to work well but my setup is mild compared to others here. I copied this PCV setup off of Mighty Mouse.
TECH Resident
Joined: Jun 2004
Posts: 840
Likes: 0
Originally Posted by libertine1015
I wonder if the pump pulley was big enough if you could run it off of the AC pulley for those that have taken out the AC (most racecars) lots of room under there now.
As for pumps
https://ls1tech.com/forums/showthrea...highlight=Pump
Complete Kit with inovative drive for Ls engines...
Originally Posted by Ryan K
Vacuum pumps help keep the rings sealed, reducing ring blowby, and therefore increasing HP.
Keith
hmm,
I might try something like this. I am wondering if its really worth all the expense.
setting it up shouldnt be too hard but its hard to pay 800 for a kit, when you can get a pump for a few hundred.
ed
I might try something like this. I am wondering if its really worth all the expense.
setting it up shouldnt be too hard but its hard to pay 800 for a kit, when you can get a pump for a few hundred.
ed