Vac pump destruction / mystery

buzzinhalfdozen · 06-01-2016, 09:20 AM

I've personally made many passes with BP breakin oil in my engine, never had an issue with mine or the several engines I've freshened for other racers. Not sure that theory holds water, however the timing advice sounds like a likely cause. Hope you find it. BTW on the engines I've done for other folks , with a wet sump and vacuum pump I "request" they not pull more than 10 inches. That number is NOT a result of much R&D merely going off the condition of engines at tear down with a known amount of vacuum.

06-01-2016, 09:20 AM	#20
buzzinhalfdozen Senior Member Join Date: Sep 2006 Location: Bellevue Ohio Posts: 984 Likes: 0 Liked 11 Times in 8 Posts	Re: Vac pump destruction / mystery I've personally made many passes with BP breakin oil in my engine, never had an issue with mine or the several engines I've freshened for other racers. Not sure that theory holds water, however the timing advice sounds like a likely cause. Hope you find it. BTW on the engines I've done for other folks , with a wet sump and vacuum pump I "request" they not pull more than 10 inches. That number is NOT a result of much R&D merely going off the condition of engines at tear down with a known amount of vacuum. __________________ Joe Buchanan SS/BX 3117 Last edited by buzzinhalfdozen; 06-01-2016 at 09:25 AM.

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