Pan Evacuation System

Bruce Noland · 10-12-2015, 03:15 PM

Must admit I have no idea if evacuation systems really help. I'm working on a flathead Land Speed motor and wonder if it would help the little guy out. Any pros and cons would be appreciated. Thanks.

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 .

Bruce Noland · 10-12-2015, 10:47 PM

Thanks Tom. Good point. I was told by SCTA tech that pan evacuation was legal. I can contact them to be sure that we are talking about the same thing, ie, pumps.

dmir55 · 10-14-2015, 01:48 PM

Just be careful that the engine is sealed. Things like main seals, dipstick tube etc. Nice thing is they tend to leak a lot less. Us pcv system for low rpm and header evacuation system for high speed.

10-12-2015, 03:15 PM	#1
Bruce Noland VIP Member Join Date: Jun 2002 Posts: 1,855 Likes: 83 Liked 444 Times in 145 Posts	Pan Evacuation System Must admit I have no idea if evacuation systems really help. I'm working on a flathead Land Speed motor and wonder if it would help the little guy out. Any pros and cons would be appreciated. Thanks. __________________ Bruce Noland 1788 STK

10-12-2015, 05:03 PM	#2
Tom Goldman VIP Member Join Date: Jan 2003 Location: Allentown,PA Posts: 2,474 Likes: 885 Liked 858 Times in 234 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

10-12-2015, 10:47 PM	#3
Bruce Noland VIP Member Join Date: Jun 2002 Posts: 1,855 Likes: 83 Liked 444 Times in 145 Posts	Re: Pan Evacuation System Thanks Tom. Good point. I was told by SCTA tech that pan evacuation was legal. I can contact them to be sure that we are talking about the same thing, ie, pumps. __________________ Bruce Noland 1788 STK

10-14-2015, 01:48 PM	#4
dmir55 Junior Member Join Date: Jul 2014 Location: northern Minnesota Posts: 64 Likes: 0 Liked 0 Times in 0 Posts	Re: Pan Evacuation System Just be careful that the engine is sealed. Things like main seals, dipstick tube etc. Nice thing is they tend to leak a lot less. Us pcv system for low rpm and header evacuation system for high speed.