O/T non-Ford: dyno test results for pans, pumps, evac and more:

[machoneman]

http://www.429-460.com/t13910-moroso-tests-about-power-with-and-without-vacum-pumpseavc-kit-bigger-oil-pan-oil-pressure-ect-very-interesting-check-it-out

[Heo]

Interesting. Never thought an oil pan could make 40 hp.
You could use that pan only to drive a small car

[Qikbbstang]

Why don't OEMs install a vac system on production vehicles?
You'd think in this day and age of fuel mileage and power that they'd figure how to run a vac-pump efficiently and reliably.

[Cyclone03]

I believe the OEM system on my wifes BMW 330i is mighty close,BB. It runs a small "pump",more of a vacuum accumulator,that pull crankcase vapors them returns the oil though the dip stick tube.

The tube then clogs about every 110,000 miles requiring the replacement of the tube because it overflows and causes a leak that comes and goes every 2 or 3 days. Yes it clogs and no I was not successful cleaning it out. New tube/hose was $140 !!!!!!!!!

[garyv]

Very good article.
Was looking for something recent like this.
Thinking of running a vac pump on my 427 to free up a few ponies.
Anyone here have any experience running one on an FE?
Mine is a top oiler block and going to run a solid flat tappet cam.
Not sure if that would have any effect on oiling the lifters by reducing the oil that's slung
by the crank.
Opinions?
garyv

[jayb]

I've been running vacuum pumps for quite a while at the track.  My first experience with one was in 2005, when I added one to the 510" FE in my Mach 1.  Back to back runs at the track with the belt for the pump disconnected and then connected resulted in an improvement from 10.60 to 10.45, probably about 20 HP.  IIRC I was running about 14" of vacuum.

Sealing up the crankcase is the difficult part of using a vacuum pump; common leak areas are the distributor seal and dipstick.  Also, on the street I have found that they are not that practical, because they tend to pull oil out of the engine at a fairly rapid rate.  Then the catch can fills up and overflows, and you have oil all over the engine compartment.  Ask me how I know this    Anyway, the easy solution is to run the pump at the track only, and take the belt off for street use, then install a breather on the valve cover instead of connecting the line to the pump.  Works good that way...

[cammerfe]

  Also, on the street I have found that they are not that practical, because they tend to pull oil out of the engine at a fairly rapid rate.  Then the catch can fills up and overflows, and you have oil all over the engine compartment.  Ask me how I know this    Anyway, the easy solution is to run the pump at the track only, and take the belt off for street use, then install a breather on the valve cover instead of connecting the line to the pump.  Works good that way...

An excellent reason to use a dry-sump!

KS