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Re: [GMCnet] Ford A426C brake vacuum pump, your opinion please? [message #327561 is a reply to message #327550] Fri, 29 December 2017 10:47 Go to previous messageGo to previous message
Kosier is currently offline  Kosier   United States
Messages: 834
Registered: February 2008
Karma:
Senior Member
John,

What is the purpose of the piece of angle iron attached to the rear of the
caliper bracket?

Gary Kosier
77PB w/500Cad
Newark, Ohio

--------------------------------------------------
From: "John Wright"
Sent: Thursday, December 28, 2017 11:53 PM
To:
Subject: Re: [GMCnet] Ford A426C brake vacuum pump, your opinion please?

> Dave,
> I have run many combo of brakes over the years. I did have 6 wheel disk
> which was 80MM on the front and a Harrison setup on the middle bogie which
> has a 12.5 in Ford disk with the 80MM caliper and a Cad set up with the
> stock Cad cal with emergency brake option. See these pictures.d I also
> show the comparison between the Harrison and Cad rotor.
>
> http://www.gmcmhphotos.com/photos/g5661-disk-brake-upgrade-leigh-harrison-brakes.html
>
> The combo I run now is still the 80MM on the front, Harrison on the middle
> with 80MM and standard drum brake on the rear with a 15/16 inch slave
> cylinder and carbon metallic shoes. I will probably go to a 7/8 inch
> slave on the rear the next time I do a complete service on the brakes.
>
> The majority of the braking is provided by the middle bogie with the rear
> not locking up. The real difference is that I have gotten the brake
> pressure back up to about 1200 psi compared to about 900 psi with the p30
> master. Pressure means power to stop. The more pressure that you have at
> the brakes is king. If you have more questions I may answer ask.
>
> J.R. Wright
> GMC GreatLakerTech Editor
> 78 Buskirk 30' Stretch
> 75 Avion Under Reconstruction
> Michigan
>
>
>> On Dec 28, 2017, at 9:33 PM, David Shafer
>> wrote:
>>
>> powwerjon,
>>
>> That is a nice looking setup up top. What is your choice at the wheels?
>> ...six disks or less? If you are running disk brakes at the rear, what
>> size
>> rotors?
>> Thanks,
>> Dave
>> --
>> 1977 26 foot 403
>>
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