While I don't think what you are saying is wrong, I do feel you are scaring people from the larger master cylinder as much as you say we are steering them in the right direction. I just hauled probably 10,000 lbs behind my truck and had no issues stopping it. Don't make it sound like a safety issue, because it's not. In fact, the smaller bore may just cause brake locking at lower pedal pressure, thus being the true safety issue!
Actually I have said several times that complete matched setup of large master and booster and its pedal is probably the best way to go. And it definitely is NOT a safety issue, and that has been proven times and again. So no I'm not trying to scare people away from running the large master, the thing works great and there is absolutely no denying that. All I'm saying is that if a person is currently running the smaller master AND is happy with it, going to the larger one is probably gonna make them unhappy. For that matter, if they are unhappy with the feel of the small master, then the new master is too stiff (different people, different preferences), there is an in-between option, the 1-1/4" master used on some late OBS gassers... So yeah, I actually do agree with you - run what you have, if you don't like it start changing things. There is really no wrong way to do it as even the large master is a vast improvement over stock brakes. My point was that if a person starts at the lower bore sizes, and goes up expecting to gain even more stopping power, that won't happen. Now whether they need that extra stopping power to begin with, or whether they can even use it, well you kinda answered that with you ability to lock all 6 with the large master and loaded down
I can say without dought what I know and feel in my brake effort and where the peddle is when I use it. Before this hydroboost I had horrible brakes. come to a full stop and in a few seconds I was creeping forwards because the rear barkes were so far out of adjustment. The front brakes were doing all the stopping plus the slow sinking brake peddle was the master cylinder continuing to push fluid to the rear brakes. This is a know fact. Not a calculated mathmatical calculation. This is what works in real life for me and many others. My post was not intended to publish false or misleading information to get others to change to the hydroboost. Hopefully you wont take offence to my post. If so I do apoligise.
Of course I won't take offense to your post, there is nothing even remotely offensive in it! Also, recommending a hydroboost conversion to anyone currently running the stock vacuum setup is not and IMHO will never be misleading information, the hydro is so much better than the vacuum and I doubt you'll find anyone who says otherwise!!! Definitely not gonna hear it from me, I try to hydroboost every vehicle I can get my hands on
Btw I didn't quote the first half of your post not out of ignorance, but because it was discussed far and wide in the other thread, and what you say is correct. And please refer to what I said above to sle2115. I'd just hate to see someone do the hydro swap with their small master, then get greedy and decide they want even more stopping power, read your post, swap the large master, then come back whining that "Icanfixall lied to me, my pedal is stiffer and truck actually stops worse now, don't listen to that guy cause he don't know what he's talking about", or something along those lines. I've actually seen that happen a few times, well not with you or hydroboost, but still - someone comes over hear and reads something, does some work to their truck without understanding the fundamentals, then goes back to their usual online place for hanging out and complains about the bad advice received here... Is my previous post making more sense now? I don't doubt you're happy with running the big master, and I don't doubt it works as awesome as you say, my comment about running the numbers was directed not at you but at folks who wanna play the swap the master game in search of something that may or may not be there...
And keeping all that in mind, I have a question for the OP tbrumm - you say you like how the pedal feels now, don't you find it somewhat long-traveled and slightly too soft? These would be the typical observations of someone who's way used to the stock vacuum brakes, I'd like to hear what your findings are please? Thanks!
No in the future if or when you upgrade the master cylinder to the 1 5/16 bore master you will really see and feel what the hydroboost can do for brakeing effect.
