wetoolowdingbangow
1/2 ton status
Finished. Came out pretty good. I'm ready to bolt the booster on now. Red locktite and apparently 110ftlbs of torque will come after I paint it.
CK5
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73 K20....crossmember time
- Thread starter wetoolowdingbangow
- Start date
wetoolowdingbangow
1/2 ton status
Alright I got her did. Seems nice and level. I went to about 85ftlbs and that seemed to pretty much be done. I used a ton of thread locker too so hopefully we won't have any issues...
wetoolowdingbangow
1/2 ton status
Had to make yet again more shit. This time to keep the holesaw concentric.
Got that done and finally mounted the hydroboost unit for the last time.
Kinda hard to see...
Heres something interesting. The pin lined up with the pedal...looks ok? Just need to put a stop in there I assume...
Got that done and finally mounted the hydroboost unit for the last time.
Kinda hard to see...
Heres something interesting. The pin lined up with the pedal...looks ok? Just need to put a stop in there I assume...
Wait did you go from non boost to H boost?
Wow I wish I woulda known that last week.. Too late now.
wetoolowdingbangow
1/2 ton status
Yeah it was a vacuum unit before and I went hydro. Hopefully its real sweet. Need to stop these 40s better lol.
Yeah this hole was to far off from the inner one I ran.
I need to pay attention because Lucy is getting this exact treatment. How different is the pedal ratio from the boost to non boost?
wetoolowdingbangow
1/2 ton status
That im not sure about. Im totally in the dark on a lot of this. The only thing I know is it somehow lined up with that pin on the pedal. Im gonna put the master on tomorrow and guesstimate where it bottoms out and somehow make a stop to prevent it from hitting absolute bottom. Im thinking the throw is very similar to the vac brakes.
Are you using the vacuum pedal with the hydrobooster? If so, the pin is further from the pivot and travels more quickly than a stock hydroboost pedal (with correspondingly less leverage). So it will bottom out before the pedal is all the way down. Having a stock hydroboost truck, and thinking that it's already too sensitive, I personally would avoid becoming even more sensitive. But it should work. Not sure what issues will happen if you don't have a well adjusted stop.
If you know how far from said pivot both pins were and the pedal lengths we could have a scientific conversation about this instead you choose anecdotal evidence...
Laziness at its finest. The numerical answer can be found here (thanks to @Blue85 for posting measurements so I don't hafta get my spare pedal out):
The overall lengths are the same. So 2 7/8 divided by 3 1/2 yields an 0.82 ratio between the relative travel speeds of the pins in question. This also applies inversely to the amount of mechanical advantage that each pedal has. You'll hafta push 1.22 times as hard on the vac. pedal to get the same amount of force as a stock pedal. This probably isn't a real problem, but I find the short travel already annoying, shortening the pedal throw even further will be roughly 22% more annoying than if you simply used the stock pedal.
Also, the hydro pedals have a return spring that brings the pedal back up. Not sure how big a deal this is, and, no, I don't have numbers for the happiness coefficient that this brings. But my pedal isn't particularly fast on the return, even with the spring.
https://ck5.com/forums/threads/illustrated-hydroboost-swap.306221/
Considering that hydroboost eliminates the need for large volume short throw masters because of its immense pressure capabilities id say leave it and verify the pedal travel.. I too agree it's overly aggressive.. Reduction might be what the dr ordered.
wetoolowdingbangow
1/2 ton status
Thanks campfire.
Im inclined to leave it. The last setup i had (vac), the pedal throw was ridiculously long. This might mean my preference is a shorter throw. As long as its not skidding the minute i put pressure on the pedal then im good with it.
Im inclined to leave it. The last setup i had (vac), the pedal throw was ridiculously long. This might mean my preference is a shorter throw. As long as its not skidding the minute i put pressure on the pedal then im good with it.
I was really diggin this UNTIL it got all technical... Way to ruin it @campfire
Good info though! I didn't know they were different. I think I'm just going to stick with my vacuum setup. I would love to free up some space under the hood, and I have a complete setup but maybe later... Keep up the good work.
Good info though! I didn't know they were different. I think I'm just going to stick with my vacuum setup. I would love to free up some space under the hood, and I have a complete setup but maybe later... Keep up the good work.
Reducing the pedal travel distance is the opposite of what I was recommending...
Try it and see what happens. For what little it's worth, I accidentally locked my brakes up for the 10,000th time this week. Smoked my way up to a red light, completely by accident. You'd think I'd be used to it by now, but it still bites me now and then...
Your large, heavy tires will help prevent that, but with the shorter pedal movement working against you it's a tossup.
So you should go do it and tell us how well it works.
1.) It's a build thread, it's SUPPOSED to be technical. If this thread got any less technical it would get kicked into the lounge.
2.) @sreidmx didn't approve of my lounge-friendly answer, so it was time to break out the mathematics. 'Cause maths is where it's at.
Are you mocking my sarcasm???1.) It's a build thread, it's SUPPOSED to be technical. If this thread got any less technical it would get kicked into the lounge.
2.) @sreidmx didn't approve of my lounge-friendly answer, so it was time to break out the mathematics. 'Cause maths is where it's at.
