Thread: Power brake booster modification

Tweet

Originally Posted by ojh

I have even made toggle cams Between the pedal and the booster) to change the ratio in cases where i could get only 5ish:1 pedal ratio.
Here is the level of effort difference (in case you are wondering), for an aggressive stop - not panic - it takes about 75lbs of leg effort for mechanical and 50lbs for power assist. They both equal the same amount of force at the caliper/drum. The caliper/drum works at about 1200psi because of the hydraulic seals, so that power assist can't stop quicker it is just easier to get there.
I didn't mean to get into engineering gobbeldygook but maybe somebody will find it interesting.

I'm finding it very interesting! I am curious if you have any pics or drawings of these toggle cams? Thanks for the gobbeldygook (spelling lesson!) and thanks for sharing the info.

Originally Posted by 34_40

I'm finding it very interesting! I am curious if you have any pics or drawings of these toggle cams? Thanks for the gobbeldygook (spelling lesson!) and thanks for sharing the info.

I'll see what i can do. I made and tested the entire system on my bench befor installing it into the car, whether i can find pics of it is the question.