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A Question For The Cadillac Gang [message #76014] Mon, 08 March 2010 17:14 Go to next message
Neil is currently offline  Neil   United States
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Location: Los Angeles and Magalia, ...
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Is this a blonds vs red head kind of thing? Is the extra displacement worth the work (and by worth - does it yield some performance gain)? Or is it a cool thing to so and so why not?

Is there dyno data on the differences, or even "I had an Olds but now life is better" kind of stories?

They say no question is too dumb to ask.

Thanks in advance.


Neil
76 Eleganza now sold
Los Angeles
Re: [GMCnet] A Question For The Cadillac Gang [message #76029 is a reply to message #76014] Mon, 08 March 2010 19:44 Go to previous messageGo to next message
GMCWiperMan is currently offline  GMCWiperMan   United States
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But, but, but, we CAN...!

Ken H.


On Mon, Mar 8, 2010 at 6:14 PM, Neil Martin <nmartin@hfbllp.com> wrote:

>
>
> Is this a blonds vs red head kind of thing? Is the extra displacement
> worth the work (and by worth - does it yield some performance gain)? Or is
> it a cool thing to so and so why not?
>
> Is there dyno data on the differences, or even "I had an Olds but now life
> is better" kind of stories?
>
> They say no question is too dumb to ask.
>
> Thanks in advance.
> --
> Neil
> 76 Eleganza
> Los Angeles
>
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Re: [GMCnet] A Question For The Cadillac Gang [message #76030 is a reply to message #76014] Mon, 08 March 2010 19:50 Go to previous messageGo to next message
Terry Skinner is currently offline  Terry Skinner   United States
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Registered: January 2004
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If you ask the Cadillac people a question like that??

On Mon, Mar 8, 2010 at 3:14 PM, Neil Martin <nmartin@hfbllp.com> wrote:
>
>
> Is this a blonds vs red head kind of thing?  Is the extra displacement worth the work (and by worth - does it yield some performance gain)?   Or is it a cool thing to so and so why not?
>
> Is there dyno data on the differences, or even "I had an Olds but now life is better" kind of stories?
>
> They say no question is too dumb to ask.
>
> Thanks in advance.
> --
> Neil
> 76 Eleganza
> Los Angeles
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>



--
Terry Skinner
253-686-2624
Roy. Washington
'76 GMC
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Re: [GMCnet] A Question For The Cadillac Gang [message #76033 is a reply to message #76014] Mon, 08 March 2010 20:01 Go to previous messageGo to next message
Mr ERFisher is currently offline  Mr ERFisher   United States
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yep, blonds and red heads

gene



On Mon, Mar 8, 2010 at 3:14 PM, Neil Martin <nmartin@hfbllp.com> wrote:

>
>
> Is this a blonds vs red head kind of thing? Is the extra displacement
> worth the work (and by worth - does it yield some performance gain)? Or is
> it a cool thing to so and so why not?
>
> Is there dyno data on the differences, or even "I had an Olds but now life
> is better" kind of stories?
>
> They say no question is too dumb to ask.
>
> Thanks in advance.
> --
> Neil
> 76 Eleganza
> Los Angeles
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>



--
Gene Fisher -- 74-23,77PB/ore/ca
“Give a man a fish; you have fed him for today --- give him a URL and
-------
http://gmcmotorhome.info/
Alternator Protection Cable
http://gmcmotorhome.info/APC.html
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Re: [GMCnet] A Question For The Cadillac Gang [message #76039 is a reply to message #76033] Mon, 08 March 2010 21:03 Go to previous messageGo to next message
Carl S. is currently offline  Carl S.   United States
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I have a friend, here in Tucson, that had a '77, bought in '78 (Edgemont, I think) who replaced his 403 with a 500 ci Cadillac. He explained to me "back in the day" that there was no way to gear down the final drive (except for, maybe the 3.21) and the best way to get 'more power' was to do the Cad swap. I think that was the origin of that procedure, but these days, with the gearing options available to us, I think it is (as the Pennsylvania Dutch would say) "just for so".

Please correct me if I'm wrong.


Carl Stouffer '75 ex Palm Beach Tucson, AZ. Chuck Aulgur Reaction Arm Disc Brakes, Quadrabags, 3.70 LSD final drive, Lenzi knuckles/hubs, Dodge Truck 16" X 8" front wheels, Rear American Eagles, Solar battery charging. GMCSJ and GMCMI member
Re: A Question For The Cadillac Gang [message #76040 is a reply to message #76014] Mon, 08 March 2010 21:10 Go to previous messageGo to next message
GeorgeRud is currently offline  GeorgeRud   United States
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If bigger is better, we should consider a 632 ci Chebbie! Now, that's some torque!

George Rudawsky
Chicago, IL
75 Palm Beach
Re: [GMCnet] A Question For The Cadillac Gang [message #76047 is a reply to message #76039] Mon, 08 March 2010 21:36 Go to previous messageGo to next message
GMCWiperMan is currently offline  GMCWiperMan   United States
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I suspect I'll wind up replacing my 3.55 FD with a 3.07 -- or a 2.73. We'll
see how the 23' tows & climbs first.

Ken H.


On Mon, Mar 8, 2010 at 10:03 PM, Carl Stouffer <carljr3b@yahoo.com> wrote:

>
>
> I have a friend, here in Tucson, that had a '77, bought in '78 (Edgemont, I
> think) who replaced his 403 with a 500 ci Cadillac. He explained to me
> "back in the day" that there was no way to gear down the final drive (except
> for, maybe the 3.21) and the best way to get 'more power' was to do the Cad
> swap. I think that was the origin of that procedure, but these days, with
> the gearing options available to us, I think it is (as the Pennsylvania
> Dutch would say) "just for so".
>
> Please correct me if I'm wrong.
> --
>
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Re: [GMCnet] A Question For The Cadillac Gang [message #76051 is a reply to message #76047] Mon, 08 March 2010 22:31 Go to previous messageGo to next message
jimk is currently offline  jimk   United States
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Location: Belmont, CA
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I can tell you that the additional cubes are noticeable, but I never
sell that to our customers.
One time few years ago, we had a customer that needed a 3.70 so we
dropped it and sent him one. We then replaced it with a 3,21.
When I went up to Oregon and back I could tell enough difference to
where I thought there was something wrong with the engine.
With out advising me,our guys put in another3.70 when the gears came
in. I then hadt go to Nevada. Well, when I got back the guys asked if
it was running better. I answered them that it was running great now
and asked them what they did.
540cid with 3.70 was much better than the 3.21.
Even a big engine can benefit from going in the torque curve sooner.
Neil, I cannot advise you to go Cad or not.

On Mon, Mar 8, 2010 at 7:36 PM, Ken Henderson <ken0henderson@gmail.com> wrote:
> I suspect I'll wind up replacing my 3.55 FD with a 3.07 -- or a 2.73.  We'll
> see how the 23' tows & climbs first.
>
> Ken H.
>
>
> On Mon, Mar 8, 2010 at 10:03 PM, Carl Stouffer <carljr3b@yahoo.com> wrote:
>
>>
>>
>> I have a friend, here in Tucson, that had a '77, bought in '78 (Edgemont, I
>> think) who replaced his 403 with a 500 ci Cadillac.  He explained to me
>> "back in the day" that there was no way to gear down the final drive (except
>> for, maybe the 3.21) and the best way to get 'more power' was to do the Cad
>> swap.  I think that was the origin of that procedure, but these days, with
>> the gearing options available to us, I think it is (as the Pennsylvania
>> Dutch would say) "just for so".
>>
>> Please correct me if I'm wrong.
>> --
>>
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>



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Applied/GMC, Fremont,CA
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Jim Kanomata
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www.appliedgmc.com
1-800-752-7502
Re: A Question For The Cadillac Gang [message #76054 is a reply to message #76014] Mon, 08 March 2010 23:21 Go to previous messageGo to next message
Duce Apocalypse is currently offline  Duce Apocalypse   United States
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This information seems kinda ambigous. Let's see some dyno sheets Smile

73 Canyon Lands, (a.k.a. The Yellow Submarine) West Los Angeles CA
Re: [GMCnet] A Question For The Cadillac Gang [message #76055 is a reply to message #76054] Mon, 08 March 2010 23:43 Go to previous messageGo to next message
USAussie is currently offline  USAussie   United States
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Shan,

I am building a Caddy 500 to run on LPG here in Australia. Potter Automotive
has been my "consultant." Here's a link to a dyno run for a Caddy 500 that
Potter Automotive built with the same parts in it as mine:

http://www.gmcmhphotos.com/photos/showphoto.php?photo=25684

Here's a link to a dyno run that Jim B did for one of the 455's he built:

http://www.gmccoop.com/images/Koba_motor_headers.jpg

Olds 455 @ 2400 RPM = 200HP & 438 FT LB
Caddy 500 @ 2425 RPN = 249HP & 536 FT LB

Regards,
Rob Mueller
Sydney, Australia
AUS '75 Avion-The Blue Streak TZE365V100428
USA '75 Avion-Double Trouble TZE365V100426


-----Original Message-----
From: gmclist-bounces@temp.gmcnet.org
[mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of Shan Rose
Sent: Tuesday, 9 March 2010 4:21 PM
To: gmclist@temp.gmcnet.org
Subject: Re: [GMCnet] A Question For The Cadillac Gang



This information seems kinda ambigous. Let's see some dyno sheets :)
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Regards, Rob M. (USAussie) The Pedantic Mechanic Sydney, Australia '75 Avion - AUS - The Blue Streak TZE365V100428 '75 Avion - USA - Double Trouble TZE365V100426
Re: [GMCnet] A Question For The Cadillac Gang [message #76056 is a reply to message #76055] Mon, 08 March 2010 23:47 Go to previous messageGo to next message
WD0AFQ is currently offline  WD0AFQ   United States
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Olds 455 @ 2400 RPM = 200HP & 438 FT LB
Caddy 500 @ 2425 RPN = 249HP & 536 FT LB

Regards,
Rob Mueller

[/quote]



That's what I thought.
Dan


3 In Stainless Exhaust Headers One Ton All Discs/Reaction Arm 355 FD/Quad Bag/Alum Radiator Manny Tran/New eng. Holley EFI/10 Tire Air Monitoring System Solarized Coach/Upgraded Windows Satelite TV/On Demand Hot Water/3Way Refer
Re: [GMCnet] A Question For The Cadillac Gang [message #76093 is a reply to message #76055] Tue, 09 March 2010 10:23 Go to previous messageGo to next message
wally is currently offline  wally   United States
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Location: Omaha Nebraska
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Rob you are using a higher compression ratio for LPG? That would make some difference too.
Robert Mueller wrote on Mon, 08 March 2010 23:43

Shan,

I am building a Caddy 500 to run on LPG here in Australia. Potter Automotive
has been my "consultant." Here's a link to a dyno run for a Caddy 500 that
Potter Automotive built with the same parts in it as mine:

http://www.gmcmhphotos.com/photos/showphoto.php?photo=25684

Here's a link to a dyno run that Jim B did for one of the 455's he built:

http://www.gmccoop.com/images/Koba_motor_headers.jpg

Olds 455 @ 2400 RPM = 200HP & 438 FT LB
Caddy 500 @ 2425 RPN = 249HP & 536 FT LB

Regards,
Rob Mueller
Sydney, Australia
AUS '75 Avion-The Blue Streak TZE365V100428
USA '75 Avion-Double Trouble TZE365V100426


-----Original Message-----
From: gmclist-bounces@temp.gmcnet.org
[mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of Shan Rose
Sent: Tuesday, 9 March 2010 4:21 PM
To: gmclist@temp.gmcnet.org
Subject: Re: [GMCnet] A Question For The Cadillac Gang



This information seems kinda ambigous. Let's see some dyno sheets Smile
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Wally Anderson
Omaha NE
75 Glenbrook
Re: A Question For The Cadillac Gang [message #76099 is a reply to message #76014] Tue, 09 March 2010 11:28 Go to previous messageGo to next message
Duce Apocalypse is currently offline  Duce Apocalypse   United States
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well from the numbers looksl ike those 45 extra cubes are good for roughly 20% more torque! I'd say thats a pretty substantial gain!

73 Canyon Lands, (a.k.a. The Yellow Submarine) West Los Angeles CA
Re: A Question For The Cadillac Gang [message #76111 is a reply to message #76014] Tue, 09 March 2010 13:47 Go to previous messageGo to next message
WayneB is currently offline  WayneB   Canada
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Has anyone put a Buick 455 in a GMC Motorhome yet?

They put out a ton of torque, some versions were over 510ft.lbs If I remember correctly.

http://en.wikipedia.org/wiki/Buick_V8_engine

455 Pontiacs arent bad either.


1976 23' GMCII By Explorer

[Updated on: Tue, 09 March 2010 13:49]

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Re: [GMCnet] A Question For The Cadillac Gang [message #76117 is a reply to message #76093] Tue, 09 March 2010 14:39 Go to previous message
USAussie is currently offline  USAussie   United States
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Registered: July 2007
Location: Sydney, Australia
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Senior Member
Wally,

Good point!

The engine is set up to run 10 to 1.

Rob Mueller
Sydney, Australia
AUS '75 Avion-The Blue Streak TZE365V100428
USA '75 Avion-Double Trouble TZE365V100426

-----Original Message-----
From: gmclist-bounces@temp.gmcnet.org
[mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of Wally Anderson
Sent: Wednesday, 10 March 2010 3:23 AM
To: gmclist@temp.gmcnet.org
Subject: Re: [GMCnet] A Question For The Cadillac Gang

Rob you are using a higher compression ratio for LPG? That would make some
difference too.

--
Wally Anderson
1975 Glenbrook
Megasquirt 455 port injection science project-On the road 5918 miles
Omaha Nebraska
Greater Midwest Classics
GMCES
http://wallyandsue.blogspot.com/


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Regards, Rob M. (USAussie) The Pedantic Mechanic Sydney, Australia '75 Avion - AUS - The Blue Streak TZE365V100428 '75 Avion - USA - Double Trouble TZE365V100426
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