Sully type bracket dimensions

[trevor pordage]

I am about to manufacture a set of sullytype brackets. i would of bought them off of Tod but due to exchange rates and shipping costs to Australia
these brackets would have cost me almost 1000 dollars Australian to get them here, the bags alone so far have cost me 750 dollars.
i have found the drawings that Mark originally built these brackets to, but i know that the Sully brackets have a few mods done to them.
would anybody have these dimensions so i can manufacture these myself

what i want to know is

how much the offset is for the standoff it appears to be about 1 inch but i would like someone to confirm

what is the final diameter that has been changed to provide more protection from tyre blowout

is the diameter the same on both ends

the above information is straight forward
but the next question is open to debate

can someone give me a reason as to why the standoff plates are set at an angle
when i have my coach at ride height the tops of the bogie arms appear to be parallel
i therefore come to the conclusion that he standoffs should be parallel at ride height
can someone please enlighten me as to why my thinking is wrong

--
Trevor
Brisbane Australia
Siesta Koala 76 Edgemont (old Bobby Moores)
71 Cadillac Eldo Convert
58 Cadillac Eldorado Brougham Project

 

[trevor pordage]

i think i may have worked out my own answer
according to my calcs
distance between airbag mounting brackets
low position 9 inches
ride height 13.5 inches
high position 16 inches


difference max height and ride height is approx 2.5 inches
difference ride height and lowest height is approx 4.5 inches
therefore the angle on the standoffs is to keep the plates parallel
halfway through their arc from low to high

is this assumption correct

--
Trevor
Brisbane Australia
Siesta Koala 76 Edgemont (old Bobby Moores)
71 Cadillac Eldo Convert
58 Cadillac Eldorado Brougham Project

 

[Bruce Hart]

Trevor, I made up a set myself when the Mark bag (Sully Bag) was first
introduced. The angle is 10 degrees.

http://www.gmcmhphotos.com/photos/new-airbag-system/p40917-replacement-airbag-airspring-rear-suspension-system.html

On Sun, Oct 9, 2016 at 12:18 AM, Trevor Pordage
wrote:

> i think i may have worked out my own answer
> according to my calcs
> distance between airbag mounting brackets
> low position 9 inches
> ride height 13.5 inches
> high position 16 inches
>
>
> difference max height and ride height is approx 2.5 inches
> difference ride height and lowest height is approx 4.5 inches
> therefore the angle on the standoffs is to keep the plates parallel
> halfway through their arc from low to high
>
> is this assumption correct
>
> --
> Trevor
> Brisbane Australia
> Siesta Koala 76 Edgemont (old Bobby Moores)
> 71 Cadillac Eldo Convert
> 58 Cadillac Eldorado Brougham Project
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>

--
Bruce Hart
1976 Palm Beach
Milliken, Co
GMC=Got More Class

 

[bdub1]

Might be some help here:
http://www.gmcmhphotos.com/photos/u8660-mgrue.html

-----Original Message-----
From: Gmclist On Behalf Of Trevor Pordage
Sent: Saturday, October 8, 2016 10:05 PM

I am about to manufacture a set of sullytype brackets. i would of bought them
off of Tod but due to exchange rates and shipping costs to Australia these
brackets would have cost me almost 1000 dollars Australian to get them here, the
bags alone so far have cost me 750 dollars.
i have found the drawings that Mark originally built these brackets to, but i
know that the Sully brackets have a few mods done to them.
would anybody have these dimensions so i can manufacture these myself

what i want to know is

how much the offset is for the standoff it appears to be about 1 inch but i
would like someone to confirm

what is the final diameter that has been changed to provide more protection from
tyre blowout

is the diameter the same on both ends

the above information is straight forward but the next question is open to
debate

can someone give me a reason as to why the standoff plates are set at an angle
when i have my coach at ride height the tops of the bogie arms appear to be
parallel i therefore come to the conclusion that he standoffs should be parallel
at ride height can someone please enlighten me as to why my thinking is wrong