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Labor Day

Labor Day

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#823263 02/05/2012 7:30 PM
Joined: Apr 2010
Posts: 160
R
'Bolter
'Bolter
R Offline
Joined: Apr 2010
Posts: 160
I never hear anything about these beasts, I only saw one in my life it was on a stack of new trucks going thru. Im sure not many hit the road.

retired wrench #823268 02/05/2012 7:41 PM
Joined: Feb 2002
Posts: 12,029
F
Cruising in the Passing Lane
Cruising in the Passing Lane
F Offline
Joined: Feb 2002
Posts: 12,029
they were mostly an industrial engine, and in the largest trucks - you can find more info on them at Jolly's site, at the bottom of the page is links to more pages

Bill


Moved over to the Passing Lane

"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir
"When we tug a single thing on an old truck, we find it falls off" ~ me
Some TF series details & TF heater pics
Flxible #823292 02/05/2012 9:14 PM
Joined: Jun 2006
Posts: 693
T
'Bolter
'Bolter
T Offline
Joined: Jun 2006
Posts: 693
i am fascinated by these engines and would like to see one (running) in real life. i was born a little before the time they were, so none were in service by the time i paid attention to engines...

since they are no longer than a L6, and no wider than a small block V8 - i wonder if the V12 will fit in a half-ton? mmmm smile

tomctomc #823298 02/05/2012 9:35 PM
Joined: Jan 2008
Posts: 4,959
C
'Bolter
'Bolter
C Offline
Joined: Jan 2008
Posts: 4,959
I don't know if there are any production numbers around. GM destroyed most of their old records. They were two 351 V6 engines cast into a common block which made them twice as heavy as a V6 and twice as long and used twice as much gas. They were designed for class 8 trucks when Diesel power had already come of age. There are some around and I have seen several of them sitting on trailers at ATHS conventions that really did nothing than make a lot of noise. Their weight and size makes their application rather limited. They were rated at 275 HP and 630 torque.

tomctomc #823299 02/05/2012 9:41 PM
Joined: Sep 2001
Posts: 29,269
Bubba - Curmudgeon
Bubba - Curmudgeon
Joined: Sep 2001
Posts: 29,269
r w,

You are right about not much being posted about that engine.

A while ago, there was a long thread started by Grigg that made for interesting reading.

tclederman #823304 02/05/2012 9:59 PM
Joined: Dec 2003
Posts: 2,733
Shop Shark
Shop Shark
Joined: Dec 2003
Posts: 2,733
There are several Youtube videos of them running along with Allisons and Packard Merlins. Do a search at Youtube.


1953 Chevy 5-window 3100
In the Stovebolt Gallery
More pix on Picturetrail

Dave
Engine & Driveline Moderator

If you can't make seventy by an easy road, don't go. ~~ Mark Twain
53moneypit #823406 02/06/2012 4:02 AM
Joined: Aug 2001
Posts: 3,587
2
Moderator
Moderator
2 Offline
Joined: Aug 2001
Posts: 3,587
Do you mean one like this that just sold on E-Bay?

http://cgi.ebay.com/ebaymotors/1962...cks&hash=item27c28a36cd#ht_500wt_975

It is a really cool truck.



1967 GMC 9500 Fire Ladder Truck
"The Flag Pole"
In the Stovebolt Gallery
1946 2-Ton grain truck
1946 3/4-ton pickup,
1953 1-ton pickup
1957 1-ton flatbed dually,
1954 Pontiac Straight Eight
Of all the things I've lost in my life, I miss my mind the most!
2-Ton #823416 02/06/2012 4:28 AM
Joined: Mar 2004
Posts: 6,212
M
'Bolter
'Bolter
M Offline
Joined: Mar 2004
Posts: 6,212
Yes 2-Ton, that's the 702 cubic inch beast. A good friend of mine had one in a 1962 GMC LCF and it was a gas hog! About 3 mpg if I remember right...

Mike B smile


Mike Boteler

1956 Chevy 3100 Resto Rod
1952 Willys M38 Army Jeep
1983 Jeep CJ7 Laredo
1984 Jeep CJ7
+++++
Silver Spring, MD
Mike B #823435 02/06/2012 5:15 AM
Joined: Feb 2008
Posts: 54
L
Wrench Fetcher
Wrench Fetcher
L Offline
Joined: Feb 2008
Posts: 54
Here is a link to one of my 702's.



1950 GMC 350 COE powered by a GMC 702 Twin-Six V12 / 4L80E combo.

LocomotiveBreath #825547 02/12/2012 8:18 PM
Joined: Oct 2009
Posts: 46
D
Wrench Fetcher
Wrench Fetcher
D Offline
Joined: Oct 2009
Posts: 46
tomctomc,
I have 2 of 702s. One complete, the other apart. I'm in eastern MA. David


Moderated by  69Cuda, Super55 

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