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Bill Baer · 02-26-2013, 01:48 PM

Well since most super class racers can run >.5 under the index I guess you could view it as a luxury.
However the modest HP increase is OK but the reduction in leaks are a bonus.
I Personally use it to stop the milking of the oil that occurs with methanol.
I drive mine @ 50% and it was worth 8 HP on thr dyno. my friend who owns the dyno has seen some motors gain up to 30 HP but it depends in a lot of factors such as if your running a low tension oil ring, how fast you spin the pump and how well you engine is sealed up.
So is it necessary, probably not, but I think the benefits are worth it.

02-26-2013, 01:48 PM	#2
Bill Baer Senior Member Join Date: Jul 2007 Location: Nothern IL Posts: 596 Likes: 1 Liked 1 Time in 1 Post	Re: Vacuum pumps in S/G Well since most super class racers can run >.5 under the index I guess you could view it as a luxury. However the modest HP increase is OK but the reduction in leaks are a bonus. I Personally use it to stop the milking of the oil that occurs with methanol. I drive mine @ 50% and it was worth 8 HP on thr dyno. my friend who owns the dyno has seen some motors gain up to 30 HP but it depends in a lot of factors such as if your running a low tension oil ring, how fast you spin the pump and how well you engine is sealed up. So is it necessary, probably not, but I think the benefits are worth it. __________________ Bill Baer 3391 SC, 339B SC, QR Last edited by Bill Baer; 02-26-2013 at 06:28 PM.