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FrontEngineDragsters.Org Forum
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Matt Shaff's Engine Shop
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Vaccuum Pumps
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Topic: Vaccuum Pumps (Read 2360 times)
spitzerscott
Full Member
Posts: 116
Your Best Time: 5.73@118.80
Your Engine: 336 Small Block Chevy
Your Track: Osceola IN, Top Eliminator runs 1/8 mile
Your Vehicle: Spitzer225 RED, Alcohol SBC
General Location: Northern Indiana
Vaccuum Pumps
«
on:
November 27, 2020, 01:13:21 PM »
I am putting a Moroso 3 vane vacuum pump on my 336 SBC alcohol engine. Can anyone tell me about how many inches of vacuum I will want to pull?
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MaggiFinn
Jr. Member
Posts: 54
Your Engine: SBC 355-406
Your Track: Kvartmiluklubburinn
Your Vehicle: FED
Re: Vaccuum Pumps
«
Reply #1 on:
November 27, 2020, 02:41:44 PM »
Here's a note from David Reher, of Reher-Morrison
On the dyno, we see fluctuations in oil pressure when the crankcase vacuum approaches 15 inches with a wet-sump system. We use an adjustable air bleed (essentially a controlled leak) to regulate the maximum pan vacuum to between 10 and 12 inches. With the wet-sump system we install on our Super Series bracket racing big-blocks, we see no fluctuations in oil pressure at this vacuum.
https://rehermorrison.com/tech-talk-24-panning-for-power/
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Magnús Finnbjörnsson
https://www.youtube.com/user/MaggiFinn1/videos
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FrontEngineDragsters.Org Forum
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Vaccuum Pumps