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Old 01-29-2004, 07:20 AM
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That is the type I am refering to. There are all kinds of boosters. Electric, hydrualic, etc. I am interested in the garden variety vacuum assist booster.

Here is a little cutaway drawing:
http://auto.howstuffworks.com/power-brake1.htm

I think the drawing in the link is misleading though. It has a caption that says "vacuum on both sides of the diaphragm". The darn thing wouldn't work unless there was a pressure difference.

You can answer one thing for me. Does my math seem to be correct and is my conversion from vacuum (inHG) to PSI correct?

Thanks
Rick
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