First hand experience with changing to the NBS master cylinder WOW!

[83GMCK2500]

I have been seeing this topic/procedure popping up more and more, I am very grateful that someone has figured this out and it is good to see a write-up here on it. The only thing I would change is the vague and irritating forum slang that is obs/nbs. GMT-400/GMT-800, far more accurate than some acronym that came from a forum years ago which gets edited everytime a new truck/suv platform comes out.

There is another brake upgrade that I will be performing soon on my DD, GMT-800 dual piston front calipers...

[speedygonzales]

Originally Posted by 83GMCK2500

The only thing I would change is the vague and irritating forum slang that is obs/nbs. GMT-400/GMT-800, far more accurate than some acronym that came from a forum years ago which gets edited everytime a new truck/suv platform comes out.

There is another brake upgrade that I will be performing soon on my DD, GMT-800 dual piston front calipers...

I did spell out the acronym on my very first post for those not familiar with it. People use it because they can see with their eyes a new body style to an old body style. They don't usually know 400 Vs 800.

With regard to your 2 piston caliper change. I did that after I changed the master cylinder and it made NO difference. Complete waste of time.

[Tom]

A guy on FSC.com just posted up how to put NBS 13" rotors+dual piston calipers both front and back on OBS trucks. So friggin simple its blowing my mind.
t_graham11- the slang doesn't ever change. OBS will always be 88-98. OOBS is 73-87. NBS 99-whatever and so on.

People use it because they can see with their eyes a new body style to an old body style

That would make sence if the terms changed with updated designs, but they don't. Nobody would think OBS means 88-98 unless the NBS was the only style out. We've marched on, so the meanings aren't so clear anymore.

As for the dual vs single piston debate, they only help if the single piston caliper doesn't have the power to clamp. They also spread the force more evenly across the pad.

[burkey05]

Originally Posted by Tom

A guy on FSC.com just posted up how to put NBS 13" rotors+dual piston calipers both front and back on OBS trucks. So friggin simple its blowing my mind.

do you have a link to this thread?

[Tom]

Originally Posted by burkey05

do you have a link to this thread?

http://www.fullsizechevy.com/forum/g...i-install.html

[speedygonzales]

Originally Posted by Tom

So friggin simple its blowing my mind.

Originally Posted by Tom

http://www.fullsizechevy.com/forum/g...i-install.html

Are you kidding me? Have you read the instructions for the rear discs?

Let me grab a few little tid bits.

but there is a little alignment pin on the plates that needed to be cut off

The other 3 issues were that the backing plates needed to be spaced out about a 1/2"

elongate the bolt holes on the axle a little

the outside of the axle flange needed to be ground down some so that the backing would slide over it

And the guy that wrote this article no longer has ABS.

Originally Posted by 400sbctruck

Curious about the NBS 13" vs slotted replacement(I can drill
And/or slot at work).

I do not care for drilled since they tend to crack. I like slotted or dimpled where the cuts don't go all the way through.

http://www.summitracing.com/parts/ebc-usr7013/overview/

[Tom]

Originally Posted by speedygonzales

Are you kidding me? Have you read the instructions for the rear discs?

Let me grab a few little tid bits.

but there is a little alignment pin on the plates that needed to be cut off

The other 3 issues were that the backing plates needed to be spaced out about a 1/2"

elongate the bolt holes on the axle a little

the outside of the axle flange needed to be ground down some so that the backing would slide over it

So lets translate: grind a little here, and there. Yes thats simple to me.

[CDR]

Originally Posted by Tom

http://www.fullsizechevy.com/forum/g...i-install.html

So I went ahead with this mod...Really happy with the results. Timed it so I was doing brakes and hubs anyway, so the knuckles and hoses were the only added expense (under $200). I now have 14.5 inch rotors and calipers off the 2010 k1500, the other parts ( knuckle, hubs ) were from a 2002.

Finally, good brakes!!!

[Tom]

Originally Posted by CDR

So I went ahead with this mod...Really happy with the results. Timed it so I was doing brakes and hubs anyway, so the knuckles and hoses were the only added expense (under $200). I now have 14.5 inch rotors and calipers off the 2010 k1500, the other parts ( knuckle, hubs ) were from a 2002.

Finally, good brakes!!!

Glad it helped someone out. Did you do it to a 2 or 4wd truck?

[tismy55]

will this MC set up work on my 89 C2500 Silverado

[Keith Seymore]

Originally Posted by tismy55

will this MC set up work on my 89 C2500 Silverado

Going from memory - no, I don't think so. C2500 already uses a different master cylinder than the C1500.

K

[tismy55]

my C2500 is the 72 gwv,, the 86gwv may use a different one but mine is just like the one in the picture that speedy put up the crappy one. I found a cardone 13-2881 for $64 .