vacuum pumps - 460 Ford Forum
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post #1 of 7 (permalink) Old 07-30-2012, 07:19 PM Thread Starter
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Smile vacuum pumps

Jon was wondering if you have made anymore advancements on the use of vacuum pumps. I know there was a question asked about them awhile back. I am looking to put one on my 545 to maybe help control alcohol in the oil. Your advice would be greatly appreciated.
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post #2 of 7 (permalink) Old 07-30-2012, 11:58 PM
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I'm not Jon, but I run a vac pump on my deal. Alky injected 598. Star Std pump. Works great. Oil stays clean all the time. Combination of the vac pump and getting heat in the engine with my gas primer setup. Used low tension oil rings. On the dyno we broke it in on gas and the pump pulled 16" at wot with the relief valve set in at just about the middle of the adjustment range. Never tired it any higher due to it being a wet sump oiling combo.

When we we switched it over to the injected alky the vac dropped some but it still held 10" at wot. That is normal from everyone I have talked to. Both injection experts and the guys at Star. I have since adjusted it just a touch upward for 11".




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post #3 of 7 (permalink) Old 07-31-2012, 01:13 AM
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What is the max inches you can safely pull on a wet sump engine without starving the wrist pins of oil?

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post #4 of 7 (permalink) Old 07-31-2012, 12:28 PM
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10-11

When to much is just right
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post #5 of 7 (permalink) Old 07-31-2012, 12:29 PM Thread Starter
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vacuum pump

Okay thanks i had read and discussion on here awhile back. And Jon Kasse suggested not running to high of vacuum on a wet sump system. Had something to do with causing the oil to foam up. And hurting the rod bearings If i remember right Jon suggested keeping it around 10" and not much more.
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post #6 of 7 (permalink) Old 08-01-2012, 12:27 AM
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Quote:
Originally Posted by 64bbsprint View Post
Okay thanks i had read and discussion on here awhile back. And Jon Kasse suggested not running to high of vacuum on a wet sump system. Had something to do with causing the oil to foam up. And hurting the rod bearings If i remember right Jon suggested keeping it around 10" and not much more.
Several years ago at one of the winter tech seminars Mr Kaase spoke on the subject. seems that above 10-11 " a gerotor style oil pump as used in Fords start to cavitate. Vac pulling the oil in one direction and the pump in another, thus the foaming oil.

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post #7 of 7 (permalink) Old 08-01-2012, 09:52 PM
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