[weq92f]

Originally Posted by geezer#99

Not quite enough vacuum at 13-14 to sustain more than one hard pump. Ideally you need 17-18. You might need a vacuum can for more storage or maybe a vacuum pump.
As for your pedal ratio decision it’s easier to just drill a new hole in the pedal arm about 1 inch lower to test.
As your braking is now can you lock up all the brakes?
And did you check vacuum in neutral or in gear?

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Good point on the vacuum test. I did it in neutral/park and on cold start so I need to redo that at operating temp and in gear (auto trans). This booster and the same amount of vacuum available worked well for years before this recent trouble had me replacing all these parts…I could lock up the tires repeatedly without any fail or fade in pedal.

My plan is to replace the booster with something similar sans bellcrank. Then add the 2nd pedal arm hole later if necessary. I removed the vacuum line to booster completely last night and found a potential leak at the intake. The line at the port as cracked and failed when I went to disconnect it. Trimmed off the bad and put it back in. Today the brakes feel better so it’s possible that line had a leak. Tonight, I was able to panick stop successfully multiple times in a row at speed. They did feel a bit stiff at idle still though.

Thanks for your input.

-Kevin