Power to manual brakes
Just found out that 72 and earliar manual brake pushrods are 6 1/8 in length and 73 and later brake pushrods are 6.50. So it is longer in later models. So I guess it should be ok or would earliar model rod be better?:BangHead:
Thanks. Brake pedal sits about 3 or 4 inches higher than gas pedal. So even now brake pedal is high but just don't want it any higher than that. I drive with both feet. Left foot brake & right foot gas!
If only there was a way to figure this out...
The master cylinder mounts to the firewall. You’re using the same pedal. Measure your current pedal height from the center of the push rod bolt to the firewall. See what that measurement is. The bottom of the cup on the manual master cylinder (where the pushrod fits) isn’t that far off from the firewall. I’m pretty sure it’s less than the difference between those two push rods.
Soooo, that means if you measure a little less than 6” from center of pedal to firewall along the push rod with the power set up, you want the 6 1/8” rod. If you measure much more than 6”, you want the longer one.
And really, the required pedal height depends on the bore of the master cylinder and the brakes being used anyway, because that will determine the stroke needed on the pedal to fully engage the brakes. Which is why they make adjustable push rods.
The danger with going to a shorter push rod is the pedal hitting the floor before the brakes are fully engaged. Keep in mind that spot will be lower if the brakes are smoking hot, so you want them to fully engage even if they’re working hard because that’s when you’ll really need it. So sitting in the driveway you want some extra space to the floor.
If that longer rod will raise the pedal, the danger is the time lost going from one pedal to the other -slowing down your reaction time to engaging the brakes. And comfort, but whatever. Stopping is more important and the ergonomics of these cars is a little lacking to begin with.
