[HWYSTR455]

Originally Posted by vertigto

Just for reference, the new 9" dual diaphragm booster on my Right Stuff 4 disc conversion wouldn't adequately stop my GTO (couldn't lock 'em up). No leaks. Pulling about 15" at idle. Replacement MC sent (different DIA) and different pads did not make enough difference.

Hydroboost system fixed all that, but obviously not a cheap alternative. Works good though.

Interesting. I would have to suspect there may have been something else off, and the hydroboost masked it. Maybe pin depth/contact is off?

I'm pulling like 13", have a C6 front brake setup on front, 98 SS rear setup, and it def locks 'em up.

Have one on the 442, it has about 14.5", and it will throw you thru the windshield if youre not careful.

.