Vacuum pump question, (search has failed me)
10-19-2009, 06:42 PM
#1
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Vacuum pump question, (search has failed me) I was wanting to use my old air/smog pump as a vacuum pump to help with scavenging. Is there a write up are anyone with experience using this setup?
Thanks
Thanks
10-20-2009, 07:17 AM
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Thanks for the reply. It would only be used during a 1/8 mile run, the car is a strip only car. I guess it would be worth a try to see if it picks up any MPH. I was just hoping to find someone who has already tried it before wasting time on a worthless endeavor..lol
10-20-2009, 08:36 AM
#4
There are people on here that tried it, from what I remember the problem was that the pump didn't last long.
I don't know what kind of power increase it would do, just take the pump, put it on a WOT switch, and hook it up to the valvecover somehow... get to a dyno and see what the gain is when it's on vs not.
If there's any substantial gain, then I'd get it on the car in a permanent fashion, if not, then just ditch it.
I don't know what kind of power increase it would do, just take the pump, put it on a WOT switch, and hook it up to the valvecover somehow... get to a dyno and see what the gain is when it's on vs not.
If there's any substantial gain, then I'd get it on the car in a permanent fashion, if not, then just ditch it.
10-20-2009, 10:26 AM
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Those electric pumps don't like oil going into them so make sure you have an oil seperator in line.
Other than that you won't see much in the way of vacuum on a guage but it should evac the crank case of some pressure.
Other than that you won't see much in the way of vacuum on a guage but it should evac the crank case of some pressure.
10-20-2009, 10:29 AM
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I'm going to give it a try and see, I guess. I have sittting in a pile of parts that was removed years ago. Took a quick look at it yeaterday and noticed it has a three wire hook up. Does anyone have any idea which wires are for what, (being lazy).
10-20-2009, 10:34 AM
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Racetronix has a clean setup for this...
http://www.racetronix.com/product/RX-CEPH/RX-CEPH.html
As said above, this should just be run at WOT or between a certain RPM if you dont have boost to reference. Pump will give out eventually.....
http://www.racetronix.com/product/RX-CEPH/RX-CEPH.html
As said above, this should just be run at WOT or between a certain RPM if you dont have boost to reference. Pump will give out eventually.....
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10-20-2009, 11:08 AM
#8
For an N/A application, it seems like a belt-driven pump is the way to go.
GZ motorsports has one I've been looking at ... it's a little pricey, but it seems to be what everyone is using.
GZ motorsports has one I've been looking at ... it's a little pricey, but it seems to be what everyone is using.
10-20-2009, 03:19 PM
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10-20-2009, 07:15 PM
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Was just checking out their site and they list...
LSX Vacuum Pump Kits without Belt Tensioner
Comes with V-belts and pulleys for use with cars that have an electric water pump. This model is only used when the serpentine belt tensioner is not utilized. The added crank pulley is an option only when there is clearance to run it and install it.
LSX Vacuum Pump Kits without Belt Tensioner
Comes with V-belts and pulleys for use with cars that have an electric water pump. This model is only used when the serpentine belt tensioner is not utilized. The added crank pulley is an option only when there is clearance to run it and install it.
10-21-2009, 06:13 AM
#16
That's what I really need, one that will bolt to the tensioner on the front.
I'm adding the vacuum pump to the things that have to go on the motor after ti gets freshened/upgraded, I'll have to look into this some more.
I'm running a motor plate, so that makes it a little different with the available mounting options, I think the plate is going to get replaced when it's out of the car (tabs on the frame rails weren't done how I really wanted them, plus the plate I have is pretty small and doesn't really give me the options of mounting the pump like I want to)
The water pump I have, is the race one that doesn't use the stock tensioner. But, once I redo the plate, I could just get a moroso or whatever that's designed to be bolted to a motor plate, just have to put the mandrel on the balancer and get it lined up. Should be simple, something that bolts right to the head would be easier, but it's no big deal.
I'm adding the vacuum pump to the things that have to go on the motor after ti gets freshened/upgraded, I'll have to look into this some more.
I'm running a motor plate, so that makes it a little different with the available mounting options, I think the plate is going to get replaced when it's out of the car (tabs on the frame rails weren't done how I really wanted them, plus the plate I have is pretty small and doesn't really give me the options of mounting the pump like I want to)
The water pump I have, is the race one that doesn't use the stock tensioner. But, once I redo the plate, I could just get a moroso or whatever that's designed to be bolted to a motor plate, just have to put the mandrel on the balancer and get it lined up. Should be simple, something that bolts right to the head would be easier, but it's no big deal.
10-21-2009, 08:45 AM
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If this is mostly a racecar, put a motorplate on it.
Bolt a moroso 3 vane pump to the plate and use the ATI mandrel for a BBC (need to use their superdamper). You can get the necessary hardware from moroso (pullies, etc).
Bolt a moroso 3 vane pump to the plate and use the ATI mandrel for a BBC (need to use their superdamper). You can get the necessary hardware from moroso (pullies, etc).
10-21-2009, 09:15 AM
#18
Car's already got a motorplate, but it was cut to be as light as possible so there's nto alot of room on it to mount something... I'll redo it and then probably go the moroso route, simply because they're right here in CT and I can take a ride down there on a saturday and pick up most anything I need.
