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Another possible MC? [message #368008]

Mon, 13 December 2021 20:18

Larry

Messages: 2875
Registered: January 2004
Location: Menomonie, WI

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Senior Member

Not saying this is the right thing to do, but when my MC was failing and I had just seen an alternative MC from 85-96 Chevy G30, P20, and GMC, G3500, P2500, P3500 Vans and trucks, I decided to just try it. Saw it at the last GMCMI convention. It is a MC that is two stage. Kinda like the principal behind the two stage floor jacks that pump up quick until they meet resistance. This MC has two bores. The initial is a 40MM bore supplying a lot of fluid initially to bring the calipers and/or wheel cylinders fluid to get the pads/shoes out to contact. Then reverts to the main bore which is 1 1/4", the same size as the OEM MC. Brings the pedal up and keeps the MC from bottoming out with 80mm front and bigger calipers in rear. I like the feel of this with better brakes. Down side is one will have to be careful to watch the fluid level as the fluid reservoir is somewhat smaller. Also, installation must be with a metric sensitized booster as the OEM booster will not accommodate this MC. Also, needs a adjustable pushrod and some time adjusting it so it is not dragging the brakes when pedal is let up. The shape of it accommodates the shape of our hood. Again, this is just an experiment on my part that seems to be working. Also available through other parts houses. Just what I'm trying. No guarantees, not endorsing. Got information from another GMC'r who will remain silent for now. Here is the NAPA part#.

https://www.napaonline.com/en/p/NMCM2580

Pic installed

http://www.gmcmhphotos.com/photos/new-style-master-cylinder/p68374-mc-from-late-model-gm-trucks.html

Larry

78 Royale w/500 Caddy
Menomonie, WI.

[Updated on: Mon, 13 December 2021 20:52]

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[Message index]

		Another possible MC? By: Larry on Mon, 13 December 2021 20:18
		Re: Another possible MC? By: Tom Katzenberger on Mon, 13 December 2021 20:32
		Re: Another possible MC? By: JohnL455 on Mon, 13 December 2021 21:33
		[GMCnet] Re: Another possible MC? By: James Hupy on Tue, 14 December 2021 23:29
		Re: [GMCnet] Re: Another possible MC? By: rvanwin on Wed, 15 December 2021 09:44
		Re: [GMCnet] Re: Another possible MC? By: boybach on Wed, 15 December 2021 12:36
		[GMCnet] Re: Another possible MC? By: James Hupy on Sat, 18 December 2021 09:36
		Re: Another possible MC? By: Larry on Tue, 14 December 2021 08:42
		Re: Another possible MC? By: wally on Tue, 14 December 2021 16:25
		Re: Another possible MC? By: Larry on Tue, 14 December 2021 17:56
		Re: Another possible MC? By: Tom Katzenberger on Tue, 14 December 2021 18:00
		Re: Another possible MC? By: rvanwin on Tue, 14 December 2021 22:17
		Re: Another possible MC? By: Larry on Sat, 18 December 2021 13:14
		Re: Another possible MC? By: Bill Van Vlack on Sat, 18 December 2021 15:32
		Re: Another possible MC? By: Larry on Sat, 18 December 2021 18:38
		Re: Another possible MC? By: Larry on Sat, 18 December 2021 18:57
		Re: Another possible MC? By: Bill Van Vlack on Sat, 18 December 2021 19:48
		Re: Another possible MC? By: Larry on Sat, 18 December 2021 21:29
		Re: Another possible MC? By: Bill Van Vlack on Sat, 18 December 2021 23:34
		[GMCnet] Re: Another possible MC? By: GMCWiperMan on Sun, 19 December 2021 06:19
		Re: [GMCnet] Re: Another possible MC? By: Larry on Sun, 19 December 2021 07:57
		Re: Another possible MC? By: rvanwin on Sun, 19 December 2021 13:33
		[GMCnet] Re: Another possible MC? By: James Hupy on Sun, 19 December 2021 13:49
		Re: Another possible MC? By: Tom Katzenberger on Sat, 18 December 2021 19:46
		Re: Another possible MC? By: Larry on Sat, 18 December 2021 21:09
		Re: Another possible MC? By: Tom Katzenberger on Sat, 18 December 2021 22:21
		Re: Another possible MC? By: Larry on Sun, 19 December 2021 08:33
		Re: Another possible MC? By: Tom Katzenberger on Sun, 19 December 2021 14:29
		Re: Another possible MC? By: Larry on Sun, 19 December 2021 19:47
		[GMCnet] Re: Another possible MC? By: GMCWiperMan on Mon, 20 December 2021 07:42
		Re: Another possible MC? By: Tom Katzenberger on Mon, 20 December 2021 08:54
		Re: Another possible MC? By: wally on Mon, 20 December 2021 09:32
		Re: Another possible MC? By: Larry on Mon, 20 December 2021 15:52
		Re: Another possible MC? By: wally on Mon, 20 December 2021 16:54
		[GMCnet] Re: Another possible MC? By: James Hupy on Mon, 20 December 2021 17:32
		Re: Another possible MC? By: Tom Katzenberger on Mon, 20 December 2021 18:12
		Re: Another possible MC? By: wally on Mon, 20 December 2021 19:42
		Re: Another possible MC? By: Larry on Mon, 20 December 2021 19:48
		Re: Another possible MC? By: wally on Mon, 20 December 2021 21:30
		Re: Another possible MC? By: Tom Katzenberger on Thu, 27 January 2022 15:47
		Re: Another possible MC? By: Larry on Thu, 27 January 2022 16:42
		Re: Another possible MC? By: Tom Katzenberger on Thu, 27 January 2022 17:35
		Re: Another possible MC? By: rvanwin on Tue, 01 February 2022 17:59
		[GMCnet] Re: Another possible MC? By: James Hupy on Tue, 01 February 2022 18:14
		Re: Another possible MC? By: Tom Katzenberger on Tue, 01 February 2022 21:34

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