Different Master Brake Cylinder?

[WisconsinHick1]

Has anyone replaced there stock master cylinder with a bigger one? My current one is on its way out and I was thinking of replacing it with a bigger one that will have more pressure.

 

[skintback]

Not sure on the master cyl but a lmm 07.5-10 hydro booster has a much better padel than 01-07 model

 

[christopherglenn]

Are they interchangeable? Other then a brake bleed, what else is needed to swap?

 

[Leadfoot]

Interested in this as well. I think Tim Judd did this, but was never able to verify 100% if it's bolt in.

 

[OregonDMAX]

I recall Ben saying he put in an lml hydrobooster and if I remember correctly he said it was direct bolt in I'll see if I can dig up the thread.

 

[RPM Motorsports]

Your thinking backward on master cylinders, smaller bore is actually more psi.

 

[BigdaddyCtrain]

I would also be curious about putting a lml hydrobooster in my lb7

 

[Awenta]

I think the lmm pump is better and a direct swap as well. Not 100% sure though

Sent from my SM-N910V using Tapatalk

 

[WisconsinHick1]

Your thinking backward on master cylinders, smaller bore is actually more psi.

Good to know Russ. Any suggestions on what to look for?

 

[SmokeShow]

How does the ABS play into this scenario? Bypass it? Reflash it somehow? Or will the extra pressure not phase it?

 

[duratothemax]

How does the ABS play into this scenario? Bypass it? Reflash it somehow? Or will the extra pressure not phase it?

Wont matter, it will be fine.

 

[Dallas S]

Ben any more info on this? If I recall you had spent some time getting a better peddle feel outa the gmt800's. 2011 hydro boost the best choice still?

 

[blk smoke lb7]

:thumb:Good question,i run the hummers with the big rubber and better binders would be great.

 

[skintback]

The lmm hydro booster has been a direct swap for me and works much better than what came with the truck. Not sure on the lml ones may have to give it a try one day

 

[WisconsinHick1]

The lmm hydro booster has been a direct swap for me and works much better than what came with the truck. Not sure on the lml ones may have to give it a try one day

Did you swap brake cylinders as well or just hydrobooster?

 

[skintback]

Just hydro booster

 

[WisconsinHick1]

Just hydro booster

So LMM hydro connected to LLY master cylinder.

 

[malibu795]

My GM455(99 C3500HD) chassis had a 40mm bore vs the 36mm bore my lmm has
The part number for said MC nm2754 via Autozone
Though it also has dual 66mm piston caliper and 14" disc brakes..

V
Haven't had time to look closely at either yet.. But plan on doing so

 

[catman3126]

If this makes the brakes more like the LML it will be worth it. I go from my 11 back to my 05 and feel like I'm pushing twice as hard to stop or to hold it at a stop light. I wonder if the larger rotors had something to do with that but maybe it is just the HB.

 

[malibu795]

I just flushed the power steering system. Definitely helped in pedal feel/response.. And pedal travel is less to get same respond out of the truck braking wise.. Just the flush.. Haven't messes with MC