[rdorman]

My pleasure! I really do enjoy this stuff! And if I can help, that would be great.

VERY interesting about the change from the original design and what the results where.

CR owners, please provide some feedback on my prior questions.

I have been playing with booster calculations on and off for the last couple of days. My system is a dual, non boosted type system.

A couple of things I have found, if you have a booster, less than 18 inches of vacuum is NOT going to cut it. There are a variety of electric pumps available and you can even get them out of the junkyard on various GM models (even GM couldn't over come low vacuum in a power system, why should we be able to!).

Just for fun, on a single diaphram 7" booster the different in peddle effort between 18 inches of vacuum and say 12 inches is is about 115 pounds of assist. So lets say your car had 18" of vacuum and all is well, then you change the cam, etc and end up with 12" of vacuum. You will have to press the brake peddle 115 pounds harder to stop the car at the same rate you used to have to push!!!! Try pushing on a scale some time say at 165 pounds (50 pounds before the cam, 165 after), that is a LOT of force.

Double diaphram, still working on it.

Rick