High Def Forum - Your High Definition Community & High Definition Resource

Go Back   High Def Forum - Your High Definition Community & High Definition Resource >
Rules HDTV Forum Gallery LINK TO US! RSS - High Def Forum AddThis Feed Button AddThis Social Bookmark Button Groups

Car Forum Talk about your favorite cars, setups, garages (got pics?)!

The Mighty 702 CI GM "Twin Six" Powerplant

Reply
AddThis Social Bookmark Button
 
Thread Tools
Old 02-19-2010, 04:19 PM   #1  
Muscle Cars Forever!
Thread Starter
 
Lee Stewart's Avatar
 

Join Date: Jan 2007
Location: Albuquerque, NM
Posts: 47,018
Cool The Mighty 702 CI GM "Twin Six" Powerplant

Was reading an article and it mentioned this unique engine from the 1960's.

Personally, I never heard of it

http://www.6066gmcguy.org/Jolly-702v12.htm
Lee Stewart is offline   Reply With Quote
Old 02-19-2010, 06:33 PM   #2  
Former Super Moderator
 
Loves2Watch's Avatar
 

Join Date: Aug 2007
Location: In Flux
Posts: 20,283
Default

Yep, with that baby you just tie a rope around your house and drag it to the new location of your desire...
Loves2Watch is offline   Reply With Quote
Old 02-19-2010, 07:01 PM   #3  
High Definition is the definition of life.
 

Join Date: Oct 2004
Location: Barrington, Il.
Age: 66
Posts: 2,324
Default

Pretty cool, it's new to me also.
Emil is offline   Reply With Quote
Old 02-19-2010, 07:56 PM   #4  
Muscle Cars Forever!
Thread Starter
 
Lee Stewart's Avatar
 

Join Date: Jan 2007
Location: Albuquerque, NM
Posts: 47,018
Default

It's a bit heavy:

702 = 1485 lbs.

With relatively slow operating speed, of only 2400 maximum r.p.m.,

http://www.6066gmcguy.org/TwinSix.htm

Some pictures of the engine in the above link
Lee Stewart is offline   Reply With Quote
Old 02-19-2010, 11:26 PM   #5  
HD Elitist
 
hatt's Avatar
 

Join Date: Jan 2008
Location: FL
Age: 44
Posts: 6,300
Default

Good find Lee. I've never heard of such a thing.

Make my V12 an Allison.
hatt is offline   Reply With Quote
Old 02-19-2010, 11:54 PM   #6  
Muscle Cars Forever!
Thread Starter
 
Lee Stewart's Avatar
 

Join Date: Jan 2007
Location: Albuquerque, NM
Posts: 47,018
Default

Quote:
Originally Posted by hatt View Post
Good find Lee. I've never heard of such a thing.

Make my V12 an Allison.
Great engine - still in use in Tractor Pulling

http://en.wikipedia.org/wiki/Allison_V-1710
Lee Stewart is offline   Reply With Quote
Old 02-20-2010, 12:40 AM   #7  
HD Elitist
 
hatt's Avatar
 

Join Date: Jan 2008
Location: FL
Age: 44
Posts: 6,300
Default

Quote:
Originally Posted by Lee Stewart View Post
Great engine - still in use in Tractor Pulling

http://en.wikipedia.org/wiki/Allison_V-1710
I remember watching the tractor pulls when I was a kid and seeing the Allisons. I bet they, and the parts, are starting to really dry up these days.

Some serious EFI going on here.
hatt is offline   Reply With Quote
Old 02-20-2010, 03:13 AM   #8  
Muscle Cars Forever!
Thread Starter
 
Lee Stewart's Avatar
 

Join Date: Jan 2007
Location: Albuquerque, NM
Posts: 47,018
Default

^^^^^ picture!

Funny how Allison went from making the premier piston gas fed engine (and the first to reach 1000 HP before WWII) . . .

To today, as they are known as the premier transmisson builder.
Lee Stewart is offline   Reply With Quote
Old 02-20-2010, 09:26 AM   #9  
HD Elitist
 
hatt's Avatar
 

Join Date: Jan 2008
Location: FL
Age: 44
Posts: 6,300
Default

Quote:
Originally Posted by Lee Stewart View Post
^^^^^ picture!

Funny how Allison went from making the premier piston gas fed engine (and the first to reach 1000 HP before WWII) . . .

To today, as they are known as the premier transmisson builder.
I guess they had to do something, the market for 2000 hp liquid cooled V12 aviation engines just isn't what it use to be.

I actually don't think the companies have anything to do with each other other than "Allison," but I'm not sure.
hatt is offline   Reply With Quote
Old 02-20-2010, 12:40 PM   #10  
Muscle Cars Forever!
Thread Starter
 
Lee Stewart's Avatar
 

Join Date: Jan 2007
Location: Albuquerque, NM
Posts: 47,018
Default

Quote:
Originally Posted by hatt View Post
I guess they had to do something, the market for 2000 hp liquid cooled V12 aviation engines just isn't what it use to be.


Quote:
I actually don't think the companies have anything to do with each other other than "Allison," but I'm not sure.
Same founder:

http://www.allisontransmission.com/company/history/

http://en.wikipedia.org/wiki/James_A._Allison
Lee Stewart is offline   Reply With Quote
Old 02-25-2010, 06:47 PM   #11  
How can anyone watch standard def?
 

Join Date: Feb 2010
Posts: 25
Default

you can get 700-800ci out of a V8. I have heard of making a V16 in the same exact fashion.
mike@hsw is offline   Reply With Quote
Old 02-25-2010, 08:50 PM   #12  
Muscle Cars Forever!
Thread Starter
 
Lee Stewart's Avatar
 

Join Date: Jan 2007
Location: Albuquerque, NM
Posts: 47,018
Default

Quote:
Originally Posted by [email protected] View Post
you can get 700-800ci out of a V8. I have heard of making a V16 in the same exact fashion.
Sure - they do that with the Pro Stock class in IHRA. They call they them Mountain Motors.

GM used to sell a 478 CI V6:

http://www.6066gmcguy.org/EngineData.htm

That 702 is a single cast block. It isn't 2 V6's married together. It's a true V12.
Lee Stewart is offline   Reply With Quote
Sponsored Links
Go Back   High Def Forum - Your High Definition Community & High Definition Resource >
AddThis Social Bookmark Button
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -6. The time now is 10:30 PM.



Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Copyright 2004 - 2018, MH Sub I, LLC dba Internet Brands