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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Nov 2008 Posts: 57 'Bolter | | 'Bolter Joined: Nov 2008 Posts: 57 | Have a CPP PB kit in my '61 C20. Pulling vacuum off the head (stock 235), and it's pretty weak at idle--as in easing up to a stop light. Noticed elec vacuum pumps in several catalogs to help maintain pressure for people running cams in their SBC's. Milling the head for more compression not in the budget right now, plus the old girl starts every time. Thoughts from the brain trust? Ray in Va Beach | | | | | Joined: Oct 2009 Posts: 426 Shop Shark | | Shop Shark Joined: Oct 2009 Posts: 426 | Theres always the hydroboost systems that function off of the p/s pump, but they aren't very budget friendly. Do you have a vacuum guage? Was wondering how much vacuum your getting. | | | | | Joined: Nov 2008 Posts: 57 'Bolter | | 'Bolter Joined: Nov 2008 Posts: 57 | Don't have P/S yet, still working on the bracketry for the 235. Had 12/13lbs just above idle last time we checked. What I'm reading says a steady 15/16 is what I need. | | | | | Joined: Jul 2008 Posts: 326 'Bolter | | 'Bolter Joined: Jul 2008 Posts: 326 | Nomad; You could try a vacuum reservoir/tank. That's another solution the guys with radical cams run. See these from Summit: http://www.summitracing.com/search/Part-Type/Vacuum-Reservoirs/I would think you should have enough stored vacuum for stopping at a red light. SimS | | | | | Joined: Sep 2010 Posts: 698 Shop Shark | | Shop Shark Joined: Sep 2010 Posts: 698 | Agreed, vacuum tank would be the most budget friendly and they work well.
My Fleet: 19411953195919651966 1953 Willy's Pickup John Vegetarian- old Indian word for bad hunter
| | | | | Joined: Jan 2011 Posts: 60 Wrench Fetcher | | Wrench Fetcher Joined: Jan 2011 Posts: 60 | | | |
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