Vacuum Pump?

[FordNut]

Anybody running a crankcase vacuum pump?

[SC Cheesehead]

Interesting question!

Marty or Sherm maybe?

[FordNut]

Did a little more research after the original post, seems the GN guys use an electric pump for this on the high boost street cars, activated with a Hobbs switch so it only runs under boost in order to prevent burning up the pumps. Belt-driven mechanical pumps are generally recommended for track only.

I had thought about doing this a long time ago, actually bought a pump and bracket but never got around to installing it. Seems that Racetronix has a pre-made wiring harness for this, and they even specify which pumps to use.

Benefits are supposed to be lower crankcase pressure which increases power and reduces oil consumption/leaks.

[RR|Suki]

Did a little more research after the original post, seems the GN guys use an electric pump for this on the high boost street cars, activated with a Hobbs switch so it only runs under boost in order to prevent burning up the pumps. Belt-driven mechanical pumps are generally recommended for track only.

I had thought about doing this a long time ago, actually bought a pump and bracket but never got around to installing it. Seems that Racetronix has a pre-made wiring harness for this, and they even specify which pumps to use.

Benefits are supposed to be lower crankcase pressure which increases power and reduces oil consumption/leaks.

would it be cheaper to run the pcv to right after the header collectors and let the exhaust system create the vac?

[FordNut]

How will the exhaust system create a vacuum? We have cats and mufflers, so the exhaust system is under pressure.

[RR|Suki]

How will the exhaust system create a vacuum? We have cats and mufflers, so the exhaust system is under pressure.

Beats me, there are lots of cars with mufflers running systems like that, they do have a valve at the end in-case of a back fire. From what I understand of it the movement of the exhaust gas through the pipe and across the spot where the pcv pipe would join creates the pull, no idea if cats would change that or not.

[FordNut]

I suspect the unburned oil vapors would mess up the cats.

[RR|Suki]

I suspect the unburned oil vapors would mess up the cats.

that I could see for sure, cats are a pain just pull em out :D :burnout:

[hotford]

vac pumps work graet for the serious racer, as for the street?, the 96-98 cobra cars had an electric one that works ok, I used a vac pump from a ford 460 truck that we converted to run as a vac pump on my brother 5.0 worked great but you will have to eliminate the pcv system and make it a closed system in order to have any benefit.
If your not running 15 psi or less dont bother...but if you are you could take advantage of it.

[Brandon]

would it be cheaper to run the pcv to right after the header collectors and let the exhaust system create the vac?


This would be an uncontrolled vacuum source though, The more exhaust the more vacuum. Well I should say the faster the exhaust flows the more vacuum.

To much vacuum can/could be bad for the the head and valve train. I would be cautious doing this or any type of external vacuum system. I tried this on my "other car" which has a turbocharger system on it and the results were the least to say "good".