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Tom Goldman · 10-12-2015, 05:03 PM

Is a vacuum pump allowed or just a closed system using engine vacuum and a check valve ?
Vacuum pumps are well documented to increase Hp even without low tension rings .
I know of a few Stockers with ring packages that slow drastically without the PCV pulling a vacuum in the pan .

10-12-2015, 05:03 PM	#2
Tom Goldman VIP Member Join Date: Jan 2003 Location: Allentown,PA Posts: 2,476 Likes: 889 Liked 881 Times in 236 Posts	Re: Pan Evacuation System Is a vacuum pump allowed or just a closed system using engine vacuum and a check valve ? Vacuum pumps are well documented to increase Hp even without low tension rings . I know of a few Stockers with ring packages that slow drastically without the PCV pulling a vacuum in the pan . __________________ Tom Goldman 1500 SG , 1506 STK