GMCforum: GMCnet » Another possible MC?

Home » Public Forums » GMCnet » Another possible MC?

Show: Today's Messages :: Polls :: Message Navigator

Re: Another possible MC? [message #368595 is a reply to message #368594]

Thu, 27 January 2022 16:42

Larry

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

Karma: 10

Senior Member

Tom,
A quote from one of the above posts I did.
"I should also mention that installation of this MC will necessitate modifying the reinforcing bracket that goes between the MC and the booster. Because of the location of the rear fluid reservoir, the brace will contact the rear upper lip of the reservoir MC. So, bending it accordingly and elongating the mounting holes on the bracket so bolts can attach it to the upper part of the firewall will be necessary. JWID"

Also note that if all you are going to do is drive it to the paint shop, you don't really need the reinforcing bracket as long as you don't really put your foot into it. Just bolt it up to the booster without the bracket and drive it to the shop. I would not leave it that way however. All of the foot pressure...without the bracket....is on the firewall. I personally think the flex on the firewall would in time work harden and crack the firewall around the booster. Just my eyeballing up and guesstimating what might happen. It took some eyeballing and bending of the bracket, and elongating the upper mounting holes to get it bolted up properly. JWID

BTW, when you get the hydro boost up and running, post some pics. I'd like to see that.

Larry

78 Royale w/500 Caddy
Menomonie, WI.

[Updated on: Thu, 27 January 2022 16:43]

Report message to a moderator

Re: Another possible MC? [message #368596 is a reply to message #368008]

Thu, 27 January 2022 17:35

Tom Katzenberger

Messages: 399
Registered: June 2019
Location: Kingsville, MD

Karma: 4

Senior Member

Larry,

Thank you for the attached info. I did read this but I have 2 brackets, one for the original MC and one for the P30. I was hoping to use the P30 bracket as I sand blasted and powder coated that one.

Your tip on just bolting it to the booster is very helpful as I only want to move the coach around the shop. I can later modify the bracket and re-powder coat it.

Thank you for all your help.

My hello's to Lucy and we are working on seeing you guys this year.

Take care,
Tom K. and Oki

Tom & Oki Katzenberger, Kingsville, Maryland, 1977 23' Birchaven, 455 C.I.D., Micro Level, Howell EBL-EFI Spark Control, Macerator, York Air Compressor, 6 Wheel Disc, Quadra Bag, Onan W/Bovee Ignition

[Updated on: Thu, 27 January 2022 17:35]

Report message to a moderator

Re: Another possible MC? [message #368632 is a reply to message #368596]

Tue, 01 February 2022 17:59

rvanwin

Messages: 325
Registered: April 2007
Location: Battlefield, MO

Karma: 6

Senior Member

Tom Katzenberger wrote on Thu, 27 January 2022 17:35

Larry,

Thank you for the attached info. I did read this but I have 2 brackets, one for the original MC and one for the P30. I was hoping to use the P30 bracket as I sand blasted and powder coated that one.

Your tip on just bolting it to the booster is very helpful as I only want to move the coach around the shop. I can later modify the bracket and re-powder coat it.

Thank you for all your help.

My hello's to Lucy and we are working on seeing you guys this year.

Take care,
Tom K. and Oki

I haven't been on the forum for a bit. On the step-bore MC that I used (1 1/8" primary and secondary bores with the 40mm step), the OEM flange worked without modification. I believe the MC was just a little smaller than the 1 1/4" bore.

I reversed the primary and secondary ports so that the primary with the larger volume that Wally indicated goes to the 4 calipers in the rear. My reasoning is that they would require more volume than the two calipers in the front. Although with the 1-ton calipers that may be a wash.

Randy (Currently in California with plenty of stopping capability)

Randy & Margie
'77 Eleganza II '403'
Battlefield, MO

Report message to a moderator

[GMCnet] Re: Another possible MC? [message #368633 is a reply to message #368632]

Tue, 01 February 2022 18:14

James Hupy

Messages: 6806
Registered: May 2010

Karma: -62

Senior Member

Actually, discs, once they are filled with brake fluid, reside in close
proximity to the rotors, unlike shoe brakes that have to travel quite a
ways to contact the drums. That travel takes a good bit of fluid before
intimate contact is obtained and pressure builds sufficiently to exert
stopping power. After the pedal is released, the springs return the shoes
to a distant resting position so that the shoes do not drag on the drums.
The disc pads, on the other hand, are only a few thousands of an inch
distant from the rotors. So they only move a very short distance before
pressure builds sufficiently. I don't think that there is an appreciable
difference in volume displaced between the two systems. Never measured it
though.
Jim Hupy
Salem, Oregon

On Tue, Feb 1, 2022, 3:59 PM Randy Van Winkle wrote:

> Tom Katzenberger wrote on Thu, 27 January 2022 17:35
>> Larry,
>>
>> Thank you for the attached info. I did read this but I have 2 brackets,
> one for the original MC and one for the P30. I was hoping to use the P30
>> bracket as I sand blasted and powder coated that one.
>>
>> Your tip on just bolting it to the booster is very helpful as I only
> want to move the coach around the shop. I can later modify the bracket and
>> re-powder coat it.
>>
>> Thank you for all your help.
>>
>> My hello's to Lucy and we are working on seeing you guys this year.
>>
>> Take care,
>> Tom K. and Oki
>
> I haven't been on the forum for a bit. On the step-bore MC that I used (1
> 1/8" primary and secondary bores with the 40mm step), the OEM flange worked
> without modification. I believe the MC was just a little smaller than the
> 1 1/4" bore.
>
> I reversed the primary and secondary ports so that the primary with the
> larger volume that Wally indicated goes to the 4 calipers in the rear. My
> reasoning is that they would require more volume than the two calipers in
> the front. Although with the 1-ton calipers that may be a wash.
>
> Randy (Currently in California with plenty of stopping capability)
>
> --
> Randy & Margie
> '77 Eleganza II '403'
> Battlefield, MO
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
>
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:

Report message to a moderator

Re: Another possible MC? [message #368634 is a reply to message #368008]

Tue, 01 February 2022 21:34

Tom Katzenberger

Messages: 399
Registered: June 2019
Location: Kingsville, MD

Karma: 4

Senior Member

I went to install my new 2 stage MC only to find that I my sensitized booster from Dave L. is not metric and the new 2 stage MC would not fit.

I installed a P30 and power bled the system. It appears to be working so far. When the coach returns from the painter I will continue the brake saga.

Also, Dave Doesn't have any metric boosters in stock or that I can get quick access to get the machine to the body shop. I will see how the P30 holds out.

I would also like to look further into the new rear caliper with the electric parking brake. I will have to check mounting possibilities.

Take care all,
Tom K.

Report message to a moderator

Pages (3): [ « ‹ 1 2 3]

Previous Topic:	Mid-winter Stretch of Legs
Next Topic:	[GMCnet] Electrolysis

Goto Forum:

-=] Back to Top [=-

Current Time: Wed May 15 10:40:14 CDT 2024

Total time taken to generate the page: 0.01080 seconds