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DEANs427

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thermactor air pump used as a......
« on: April 07, 2012, 12:05:40 PM »
has anyone tried using a thermactor air pump (polution pump) in a cheap crankcase evacation system? ie. using the pump to suck on the crankcase rather than its designed purpose of blowing into the exhaust ports? just thinking...
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jayb

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Re: thermactor air pump used as a......
« Reply #1 on: April 07, 2012, 01:18:11 PM »
If I recall correctly GZ Motorsports builds their vacuum pumps starting with a Thermactor pump.  www.gzmotorsports.com

I've never tried using a stock pump but it might work...
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Jay Brown
- 1969 Mach 1, Drag Week 2005 Winner NA/BB, 511" FE (10.60s @ 129); Drag Week 2007 Runner-Up PA/BB, 490" Supercharged FE (9.35 @ 151)
- 1964 Ford Galaxie, Drag Week 2009 Winner Modified NA (9.50s @ 143), 585" SOHC
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machoneman

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Re: thermactor air pump used as a......
« Reply #2 on: April 08, 2012, 09:16:56 AM »
When vac pumps started to become the rage some years ago I read an article about stock   Thermactor pumps. IIRC, they do work up to a point but a few racers said don't bother with an OEM unit. They didn't generate enough of a vacuum to do much and w/o a way to tighten the internal clearances one was left at the mercy of whatever clearances a specific pump had when installed.

Now, maybe those electric leaf blowers the ricer crowd claims can supercharge your engine might be a better bet.... ::)
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Bob Maag

DEANs427

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Re: thermactor air pump used as a......
« Reply #3 on: April 08, 2012, 02:51:51 PM »
yeah, a few years back I experimented with a power brake vacuum pump from a desiel school bus that I plumbed into the road draft tube on my 67. made about a tenth and 2-3 mph improvement if I remember. however the pump seized after a few passes and then I sold that car and did not pursue the idea anymore, until now...
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1956 Ford Gasser 427FE
1966 Fairlane
1966 Bronco supercharged

cammerfe

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Re: thermactor air pump used as a......
« Reply #4 on: April 08, 2012, 06:53:40 PM »
Quote from: DEANs427 on April 08, 2012, 02:51:51 PM
yeah, a few years back I experimented with a power brake vacuum pump from a desiel school bus that I plumbed into the road draft tube on my 67. made about a tenth and 2-3 mph improvement if I remember. however the pump seized after a few passes and then I sold that car and did not pursue the idea anymore, until now...

The trouble with the leaf blower approach is that it requires such a long extension cord!

KS
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Barry_R

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Re: thermactor air pump used as a......
« Reply #5 on: April 09, 2012, 07:59:11 AM »
The OE vacuum pumps work.  That's what they used for several years until the aftermarket ones became available.  There was a higher volume 460 application that was pretty popular.  Biggest problem was that they did not last long - they were intended to pump clean air and the soot & oil mist coming out of the crankcase was pretty hard on the internal parts.
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rcodecj

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Re: thermactor air pump used as a......
« Reply #6 on: April 11, 2012, 05:28:06 PM »
X2 on the they don't last long used in that application.
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