Requested: Clutch Pedal Measurement
Racer
Joined: Dec 2003
Posts: 275
Likes: 6
From: NY
Rod "D" has a bend in it.. If you go through a normal clutch adjustment and set the distance between throw out bearing and pressure plate the rod "D" could be locked down putting too much stress on the spring clip attaching the rod "D" to the clutch pedal. It feels too hard and several clutch applications the clutch pedal goes to the floor.... spring clip is broken .Bad news........... After finding rod "D"s sweet spot by actuating the clutch pedal with nuts "A" and "B" semi tight then lockdown "A" and"B"
Melting Slicks
Joined: Jun 2011
Posts: 3,118
Likes: 599
Drifting
Joined: Dec 2020
Posts: 1,586
Likes: 956
From: Central Florida
2024 Corvette of the Year Winner - Modified
2023 C3 of the Year Winner - Modified
2021 C3 of the Year Finalist - Modified
Thanks guys.
What I am up to is trying to get a lighter clutch pedal. I believe the C3 has a short pedal and a bad leverage ratio. And yet I need a strong clutch for my BBC. I will most likely be going to a dual disc setup to get the pedal pressure down.
When I drove my BB into the garage (for the two blocks that I drove it) the clutch pedal pressure was terrifically high. I want the opposite, as easy of a pedal as I can get.
I also do not need the 1200ftlb capability a dual disc offers me. I only have 550 ftlb. But the single disc versions have a strong pedal.
I am currently collecting data from McLeod and also Ace on their dual disc clutches. Then if the pedal pressure is still not as light as I would like it, I will be talking to H&R locally and have him build me a custom one. The dual disc versions have so much disc area they can get by with much less spring pressure than they currently have. Stay tuned.
What I am up to is trying to get a lighter clutch pedal. I believe the C3 has a short pedal and a bad leverage ratio. And yet I need a strong clutch for my BBC. I will most likely be going to a dual disc setup to get the pedal pressure down.
When I drove my BB into the garage (for the two blocks that I drove it) the clutch pedal pressure was terrifically high. I want the opposite, as easy of a pedal as I can get.
I also do not need the 1200ftlb capability a dual disc offers me. I only have 550 ftlb. But the single disc versions have a strong pedal.
I am currently collecting data from McLeod and also Ace on their dual disc clutches. Then if the pedal pressure is still not as light as I would like it, I will be talking to H&R locally and have him build me a custom one. The dual disc versions have so much disc area they can get by with much less spring pressure than they currently have. Stay tuned.
Thread Starter
Old Pro Solo Guy
Joined: Dec 2017
Posts: 8,121
Likes: 4,480
From: Marlton NJ
I may have to. But I would rather avoid the modifications / complications. Pretty sure I can get what I want without it.
Contrary to popular belief, a hydraulic clutch does not change the pedal linkage ratios at all. That is determined by the 6.5" pedal movement and the 0.5" clutch finger movement.
It will have a little less friction, but that's not significant over a properly built/maintained mechanical system. They do not get stiffer over time and need less grease/maintenance over time, that's true, until they leak & suffer complete & catastrophic failure. It does allow for different packaging, but that is kind of irrelevant for our cars since they were designed with a z-bar. So IMHO on our cars it is a mod looking for a problem to solve. So why do it? Just to replace a worn-out stock system? Why not just get the stock system working well?
Contrary to popular belief, a hydraulic clutch does not change the pedal linkage ratios at all. That is determined by the 6.5" pedal movement and the 0.5" clutch finger movement.
It will have a little less friction, but that's not significant over a properly built/maintained mechanical system. They do not get stiffer over time and need less grease/maintenance over time, that's true, until they leak & suffer complete & catastrophic failure. It does allow for different packaging, but that is kind of irrelevant for our cars since they were designed with a z-bar. So IMHO on our cars it is a mod looking for a problem to solve. So why do it? Just to replace a worn-out stock system? Why not just get the stock system working well?
