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-   -   12 Bold Chevy & Dana 60 Rear (https://classracer.com/classforum/showthread.php?t=24124)

Tom Goldman 03-04-2010 04:40 PM
Re: 12 Bold Chevy & Dana 60 Rear
 
Quote:
Originally Posted by Geerhead55 (Post 171939)
Yes,,,Jim's Cuda was a SS/AA in the old days with a 12 bolt. There are plenty of shots of the car in old Super Stock and Drag Illustrated magazines. We thought it was wierd at the time, but he claimed the 12 bolt was lighter and more efficient than a Dana 60 or a 9 in. Danny Durham
My Uncle owned the old DeFrank and Cohen SS/AA Cuda many years ago. ....We used to take out the 9" and put in a 12 bolt when he needed to go fast. ....at that time, [mid '80's] the 12 bolt was worth almost .05-.08 secs..........as far as I remember we never hurt the 12 bolt. ....Tom

Rich Biebel 03-04-2010 06:41 PM
Re: 12 Bold Chevy & Dana 60 Rear
 
John Friel also used a 12 bolt in his SS/AA Dart......He was running low 9's back then. I think it's pretty common thinking that the 12 bolt is quicker than a Ford or Dana.....

Mike Taylor 3601 03-04-2010 09:52 PM
Re: 12 Bold Chevy & Dana 60 Rear
 
Mark Williams used to have center section to go in 9'' that used 12 bolt gears was for reduced drag,may still make them.Even with right clutch stick still harder on rear due to impacting gears on launch where footbraking gears are loaded when you launch they don't get smacked like a stick or trans brake does.
Mike Taylor3601

BlueOval Ralph 03-05-2010 07:46 AM
Re: 12 Bold Chevy & Dana 60 Rear
 
Actually I think it was Strange they still have one. He developed it for FORD MOTOR Company for the NASCAR Program to be used for the resictor plate tracks for qualifying BUT NASCAR banned it befor it could be used as I remeber there was a lot of testing done on it by the Fords Teams!


Quote:
Originally Posted by Mike Taylor 3601 (Post 173062)
Mark Williams used to have center section to go in 9'' that used 12 bolt gears was for reduced drag,may still make them.Even with right clutch stick still harder on rear due to impacting gears on launch where footbraking gears are loaded when you launch they don't get smacked like a stick or trans brake does.
Mike Taylor3601

Mike Taylor 3601 03-05-2010 12:37 PM
Re: 12 Bold Chevy & Dana 60 Rear
 
Mark Williams also had one for econo altereds etc I don't know if they still do?
Mike Taylor 3601


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