And thank YOU for another magnificent haiku/tone poem/word salad.Boxcar wrote: While my 9550 cam might be a source of inherently low vacuum#s...booster exhibits a sink soflty to its bottom on pedal's last cms of movement..all the while braking, but requiring faith as progressive resistance of line pressure goes away..almost as if bleeding a cyl.
Thanks.// Eric
I shall interpret for the Earthlings, with your blessing . . .
"My performance cam reduces vacuum assist to the booster. I experience a dropping pedal under braking."
To which I get to reply,
"A booster leak/insufficiency exhibits a *rising* pedal, a sinking pedal suggests that your master cylinder is failing or you have a leak elsewhere in the system."
Check for wet spots at the backing plates or for paint blistering/lifting off the booster underneath the master cylinder. If it is the rear piston/seal of the master cylinder, you might also have brake fluid inside the booster can. Check."
Colin