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testing brake power booster off the car


Seppi72

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I know how to check for a weak power booster that's on a working car and there are many videos on how to do that.

I have several boosters from various cars that I've amassed and want to know how many, if any of them are still functional before I go to the trouble of refreshing one or more of them for my restomod.

  • What I'd like to know is if there's a way to determine the "goodness" of a power booster that is off the car.

I have a vacuum pump, tubing and gauges and figure that I could draw an 18" (or so) vacuum, shut the pump off and then watch the vacuum drop over time.  I could do the same with the installed and working booster on my other S30 to establish a baseline.

Does this make sense to those of you who might be familiar with this?  Or, is there another way to make such a determination?

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