DRR Sportsman
| My MOROSO 4-Stage Enhanced Vacuum pump on my SDPC 582 Head Hunter engine on alcohol is around 6" at idle and around 15" down track. IHRA ACDELCO Canadian Nationals Top/et Iron man Champion Don Davis 57 Corvette Super Gas roadster SDPC 582 Head Hunter on alcohol |
| Posts: 268 | Location: Toronto Ont/Surprise AZ | Registered: August 18, 2003 |
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DRR Sportsman
| Ill play along. Have 11 at idle and 18 downtrack
"I am not ashamed to confess I am ignorant of what I do not know." Marcus Tullius Cicero
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| Posts: 1023 | Location: Las Vegas, NV | Registered: April 14, 2004 |
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DRR Sportsman
| Moroso three vane enhanced driven at 50% with radius tooth pulleys and alcohol carb. Pulls 5" at idle and the vacuum break is set to pull 12" down track. The break isn't close to being maxed out so I assume I could pull more if I wanted.
Denis LeBlanc
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| Posts: 498 | Location: Manchester, NH | Registered: February 03, 2006 |
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DRR Sportsman
| quote: Originally posted by SmokinChicken: Yea I dont think the previous owner ever adjusted it and just left it how it came from aerospace.
yeah, i don't think that is it. If the max vacuum was set at 6 then it would have 6 at idle and 6 down track. I have a big electric vacuum pump that i use to check engine seal and i will bet that if i hooked yours up, it would be whistling like a sailor on payday getting ready to visit a hooker. Joe
Without data, you’re just another guy with an opinion.
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DRR Sportsman
| I didn't say it wasn't consistent. I said it would leak a vacuum. this happens if they put a "stock" single lip seal that lets air in when under vacuum. It could be the crankshaft rear or front seal. but with that low of a vacuum you either have some sort of pump issue or a leak. Joe
Without data, you’re just another guy with an opinion.
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DRR Pro
| My Star setup is 5 at idle ad 12 downtrack. We didnt use any special crank seals or flip them. |
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DRR Pro
| Star vacuum pump here....I just make sure my engine is sealed and cranked the regulator all the way down!!! No issues at all with oiling, solid oil pressure on and off the throttle! Bearings looked really good last freshen! I honestly don't know how much I'm pulling....still trying to get the graph to come up on the grid but I think I figured it out with markemark's help! Mark Goulette Owner/Driver of the Livin' The Dream Racing dragster www.livinthedreamracing.com"Speed kills but it's better than going slow!" Authorized Amsoil Retailer |
| Posts: 1520 | Location: Back home in Alaska! | Registered: February 13, 2011 |
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DRR Elite
| 8 idle 10 run regulated 4 vane enhance moroso driven a little faster With 15 psi boost
Foxtrot Juliet Bravo
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