| Cad 500 Help [message #108496] |
Mon, 13 December 2010 17:33  |
Frank Condos
Messages: 90
Registered: March 2004
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I am in the process of getting my '73 with the Cad 500 running again. The engine was installed and driven a little by the PO. I have taken the Quadrajet off and cleaned it and adjusted the . When I removed the carb I found a 1" phenolic spacer under the carb. A question, is this a standard installation? My parts list that goes up to 1974 doesn't show it. I understand the use of spacers to keep carb temperature down but I am questioning if it is really necessary since it causes a higher hatch level. What have you non-efi owners found?
Frank Condos
Ahwahnee, CA
A running'76
A soon to be running '73 (I hope)
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| Re: Cad 500 Help [message #108498 is a reply to message #108496] |
Mon, 13 December 2010 17:48  |
fred v
Messages: 999
Registered: April 2006
Location: pensacola, fl.
Karma: 0
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| Frank Condos wrote on Mon, 13 December 2010 17:33 |
I am in the process of getting my '73 with the Cad 500 running again. The engine was installed and driven a little by the PO. I have taken the Quadrajet off and cleaned it and adjusted the . When I removed the carb I found a 1" phenolic spacer under the carb. A question, is this a standard installation? My parts list that goes up to 1974 doesn't show it. I understand the use of spacers to keep carb temperature down but I am questioning if it is really necessary since it causes a higher hatch level. What have you non-efi owners found?
Frank Condos
Ahwahnee, CA
A running'76
A soon to be running '73 (I hope)
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my '76 has a spacer about 1/4" to 3/8".
Fred V
'77 Royale RB 455
P'cola, Fl
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| Re: [GMCnet] Cad 500 Help [message #108502 is a reply to message #108496] |
Mon, 13 December 2010 18:17 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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Frank,
My Cad500 was apparently pure stock '76 Eldorado when I got it -- with no
carb. spacer. But just to be sure, you need Gary Kosier's answer.
With my Holley TB, I've been able to keep the original hatch cover almost
stock without raising it. I use the Eldorado air cleaner. It was necessary
to elongate the cutout in the plywood toward the rear and install a new
aluminum plate on top. A small ball-peened dome at the highest part of the
air cleaner gives me 1/2" of vertical clearance -- maybe. I also cut out an
area over the distributor to be sure it won't hit.
However, since I use my own front motor mount, the engine may sit lower than
others.
Ken H
On Mon, Dec 13, 2010 at 6:33 PM, Frank Condos <fcondos@sti.net> wrote:
>
>
> I am in the process of getting my '73 with the Cad 500 running again. The
> engine was installed and driven a little by the PO. I have taken the
> Quadrajet off and cleaned it and adjusted the . When I removed the carb I
> found a 1" phenolic spacer under the carb. A question, is this a standard
> installation? My parts list that goes up to 1974 doesn't show it. I
> understand the use of spacers to keep carb temperature down but I am
> questioning if it is really necessary since it causes a higher hatch level.
> What have you non-efi owners found?
>
>
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: [GMCnet] Cad 500 Help [message #108521 is a reply to message #108496] |
Mon, 13 December 2010 22:26 |
Douglas Norton
Messages: 191
Registered: April 2008
Karma: 0
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Senior Member |
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Nothing near 1" on mine. It is a 73 stock 455. I did find two thick spacers left over in my old rebuild kits.
In my old age I clearly remember no 1" gasket or spacer. With my memory, someone may well call me on this. With regard to memory, I am like the blind man who said he could not see anything he could not see.
--- On Mon, 12/13/10, Frank Condos <fcondos@sti.net> wrote:
From: Frank Condos <fcondos@sti.net>
Subject: [GMCnet] Cad 500 Help
To: gmclist@temp.gmcnet.org
Date: Monday, December 13, 2010, 3:33 PM
I am in the process of getting my '73 with the Cad 500 running again. The engine was installed and driven a little by the PO. I have taken the Quadrajet off and cleaned it and adjusted the . When I removed the carb I found a 1" phenolic spacer under the carb. A question, is this a standard installation? My parts list that goes up to 1974 doesn't show it. I understand the use of spacers to keep carb temperature down but I am questioning if it is really necessary since it causes a higher hatch level. What have you non-efi owners found?
Frank Condos
Ahwahnee, CA
A running'76
A soon to be running '73 (I hope)
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| Re: [GMCnet] Cad 500 Help [message #108531 is a reply to message #108518] |
Mon, 13 December 2010 23:21 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Senior Member |
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Change the exaust manifole to a non valved unit, then runa standard gasket.
If it has an EGR valve, remove it and cap it off.
On Mon, Dec 13, 2010 at 7:05 PM, Kosier <gkosier@roadrunner.com> wrote:
>
> ----- Original Message -----
> From: "Frank Condos" <fcondos@sti.net>
> To: <gmclist@temp.gmcnet.org>
> Sent: Monday, December 13, 2010 6:33 PM
> Subject: [GMCnet] Cad 500 Help
>
>
>>
>>
>> I am in the process of getting my '73 with the Cad 500 running
>> again. Â The engine was installed and driven a little by the PO.
>> I have taken the Quadrajet off and cleaned it and adjusted the
>> . Â When I removed the carb I found a 1" phenolic spacer under
>> the carb. A question, is this a standard installation? Â My
>> parts list that goes up to 1974 doesn't show it. I understand
>> the use of spacers to keep carb temperature down but I am
>> questioning if it is really necessary since it causes a higher
>> hatch level. Â What have you non-efi owners found?
>>
>> Frank Condos
>> Ahwahnee, CA
>> A running'76
>> A soon to be running '73 (I hope)
>
> Frank,
>
> From 1970 to 1980 Cadillac used part# 1494992 under the Q-Jet. Â A
> thin little gasket. Â Someone was probably trying to
> correct a heat problem caused by the heat riser valve in the RH
> manifold frozen shut. Â Most of them are.
>
> Gary Kosier
>
> _______________________________________________
> GMCnet mailing list
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>
--
Jim Kanomata
Applied/GMC, Fremont,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
_______________________________________________
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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