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Old 07-16-2010, 08:13 AM
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need more vacuum question

With a large cam, I don't have enough vacuum to make use of the vacuum assist. '65 chevy P/U, switched from drum to disc on the front, dual master cylinder installed. street driving is fine but at the track, there is not enough brake to hold at the start line.
I need an after market vacuum pump, what have others done to solve this issue??? Is there an electric pump for any vehicle that doesn't cost $ 400.

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Old 07-16-2010, 08:23 AM
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Yes ,,, go to the junk yard and find a Chevy Citation or other GM product similar that came with a Diesel engine. They have a small, electric vacuum pump to boost the vacuum for brakes ...

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Old 07-16-2010, 08:31 AM
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There is also "Rhoades" lifters. They are a "variable timing" lifter. I have them in my Gran Sport and the power brakes work. http://www.rhoadslifters.com/

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Old 07-17-2010, 02:23 PM
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You could also try a vacuum reservoir. Make sure your check valves are working.
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Old 07-18-2010, 06:51 AM
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You can get a vacuum pmp from the parts yard. Look for a 90's Jaguar, they had a vacuum pump on the left side in front of the wheel well. It was used for the same reason you now want one.
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Old 07-18-2010, 08:37 AM
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Of course ANY "container", with a one way valve is going to work. I had one I ran on my Truck for years that was from a big Buick from the sixties. It looked like a two large oblong bowls pinch welded together.

Brian
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