Booster push rod length adjustment
Car = 1970 chevelle SS 396
Bought the Delco Booster and new master cylinder that got repopped under the GM license. The manufacturer stopped sending the proper booster push rod. They send you the long one and not the shorter one. In the past, they sent you both rods and you just used the proper rod for your application. Their directions say that you should have an adjustable rod (I only had one solid rod), so the directions are not 100% helpful. I called the manufacturer, they said that the reason for the one rod is to save money. I told them that I would have gladly paid $5 for the proper rod!
The "tech" guy told me the shorter rod was 2 9/16 inches (he kind of measured one while I was on the phone). I did some of my own measuring and it seemed to be correct. This would allow the rod to just touch the master cylinder. So I cut it, rounded off the edge and assembled everything all the while checking and measuring. The rod just barely touch the back of the cylinder if at all.
Keep in mind that the brake system was compeletly restored. New lines, rotors, calibers, cylinders, etc. (I did not replace the proportion valves)!
I did have to remove the rod that was too long after it mistakenly got installed. Ok, my mistake. I had no pedal, something was obviously wrong. My GM mechanic neighbor verified that the rod was too long. The call to the manufacturer tech department verified the problem..
The car is on the road now and it just seems like I have no power brakes. I get immediate response when pressing the pedal, it just seems like its manual brakes and not power. Doesn't feel like my truck brakes, nor my daughters new Chevy nor my girlfriends 12 year old toyota for that matter.
I'm wondering if the rod is too long still? The car does stop evenly and quickly, I just don't get that cushy feeling that I associate with power brakes.
Is there a way of "testing" a power booster? I was wondering if I messed it up while removing the rod the first time. Is this just the way the brakes should be and I'm being too picky? I do not have another chevelle to compare it to.
I'm sure you folks can appreciate the hundreds of hours we put into our cars, I'm just trying to get it right.
Any advice is appreciated.