Re: weight difference 8 3/4, 9 in and d60
[Re: wyldebill]
#1770126
03/03/15 02:48 PM
03/03/15 02:48 PM
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Joined: Jan 2003
Posts: 5,894 Florida
Locomotion
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FYI, while there are obvious weight differences, the Dana 60 is more "efficient" than an 8 3/4 rear. I've been told by several class racers that in most cases, there has been minimal, if any, change in ET. The Ford 9" is probably the least efficient of the popular rears and the Chevy 12 bolt is the best!
It's been discussed and, for some reason, 30 - 40 lbs sticks in my mind. But it will have to be an apples-to-apples comparison with the same width, spool or sure-grip, etc.
Last edited by Locomotion; 03/03/15 02:51 PM.
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Re: weight difference 8 3/4, 9 in and d60
[Re: Locomotion]
#1770127
03/03/15 02:50 PM
03/03/15 02:50 PM
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Joined: Mar 2007
Posts: 1,608 Rudolph, Ohio
moparguy7074
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Rudolph, Ohio
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Quote:
FYI, while there are obvious weight differences, the Dana 60 is more "efficient" than an 8 3/4 rear. I've been told by several class racers that in most cases, there has been minimal, if any, change in ET. The Ford 9" is probably the least efficient of the popular rears and the Chevy 12 bolt is the best!
Are you trying to start WW III? Saying a 9" is the least efficient! Oh the humanity! LOL
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Re: weight difference 8 3/4, 9 in and d60
[Re: moparguy7074]
#1770130
03/03/15 03:06 PM
03/03/15 03:06 PM
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Joined: Jan 2003
Posts: 5,894 Florida
Locomotion
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Florida
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Quote:
Quote:
FYI, while there are obvious weight differences, the Dana 60 is more "efficient" than an 8 3/4 rear. I've been told by several class racers that in most cases, there has been minimal, if any, change in ET. The Ford 9" is probably the least efficient of the popular rears and the Chevy 12 bolt is the best!
Are you trying to start WW III? Saying a 9" is the least efficient! Oh the humanity! LOL
It would be pointless to argue with the facts. As far as strength, I'm well aware of my old buddy Quicktree's opinion on 9" vs Dana 60's. But despite the ease of gear changes in a 9", a Dana 60 will handle anything most people would ever need. Once the optimum gear ratio is known, the drop-out center benefit isn't that big of a deal. Besides, the expense of maxing out a 9" is astronomical.
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Re: weight difference 8 3/4, 9 in and d60
[Re: 68shifter]
#1770131
03/03/15 03:08 PM
03/03/15 03:08 PM
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Joined: Feb 2007
Posts: 6,295 U.S.
moparniac
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My Dana 60 was lighter than the 83/4 it replaced ...the danA had a spool and disc brakes.
Mopar Performance
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Re: weight difference 8 3/4, 9 in and d60
[Re: moparguy7074]
#1770132
03/03/15 04:25 PM
03/03/15 04:25 PM
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Joined: Feb 2007
Posts: 2,578 sweden
1Fast340
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Quote:
Quote:
FYI, while there are obvious weight differences, the Dana 60 is more "efficient" than an 8 3/4 rear. I've been told by several class racers that in most cases, there has been minimal, if any, change in ET. The Ford 9" is probably the least efficient of the popular rears and the Chevy 12 bolt is the best!
Are you trying to start WW III? Saying a 9" is the least efficient! Oh the humanity! LOL
Dont we need the pinionangle variable to be perfectly sure?
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Re: weight difference 8 3/4, 9 in and d60
[Re: wyldebill]
#1770137
03/03/15 06:25 PM
03/03/15 06:25 PM
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Joined: Feb 2007
Posts: 2,578 sweden
1Fast340
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i didnt start this to argue witch is best. only asking for weights. i dont thing the parasitic drag is enough to worry with.
Sorry could not resist.
To get back on track i think you could see a substantial difference depending on all the parts inside the axle aswell as other little things here and there all the way down to details like the driveshaft lenght,wish will be different depending on rearend used
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Re: weight difference 8 3/4, 9 in and d60
[Re: Locomotion]
#1770139
03/03/15 07:18 PM
03/03/15 07:18 PM
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Joined: Jan 2003
Posts: 32,394
Quicktree
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I Win
Joined: Jan 2003
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Quote:
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Quote:
FYI, while there are obvious weight differences, the Dana 60 is more "efficient" than an 8 3/4 rear. I've been told by several class racers that in most cases, there has been minimal, if any, change in ET. The Ford 9" is probably the least efficient of the popular rears and the Chevy 12 bolt is the best!
Are you trying to start WW III? Saying a 9" is the least efficient! Oh the humanity! LOL
It would be pointless to argue with the facts. As far as strength, I'm well aware of my old buddy Quicktree's opinion on 9" vs Dana 60's. But despite the ease of gear changes in a 9", a Dana 60 will handle anything most people would ever need. Once the optimum gear ratio is known, the drop-out center benefit isn't that big of a deal. Besides, the expense of maxing out a 9" is astronomical.
dana 60's are for trucks 9s are for racing, you can't argue facts
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Re: weight difference 8 3/4, 9 in and d60
[Re: moparniac]
#1770140
03/03/15 07:20 PM
03/03/15 07:20 PM
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Joined: Jan 2003
Posts: 15,439 Val-haul-ass... eventually
BradH
Taking time off to work on my car
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Taking time off to work on my car
Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
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Quote:
My Dana 60 was lighter than the 83/4 it replaced ...the danA had a spool and disc brakes.
My Strange S-60 is going to lighten my wallet a whole lot more than the 8-3/4 it's going to replace.
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Re: weight difference 8 3/4, 9 in and d60
[Re: Quicktree]
#1770141
03/03/15 08:40 PM
03/03/15 08:40 PM
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Joined: Jan 2003
Posts: 5,894 Florida
Locomotion
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Joined: Jan 2003
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Florida
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Quote:
Quote:
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FYI, while there are obvious weight differences, the Dana 60 is more "efficient" than an 8 3/4 rear. I've been told by several class racers that in most cases, there has been minimal, if any, change in ET. The Ford 9" is probably the least efficient of the popular rears and the Chevy 12 bolt is the best!
Are you trying to start WW III? Saying a 9" is the least efficient! Oh the humanity! LOL
It would be pointless to argue with the facts. As far as strength, I'm well aware of my old buddy Quicktree's opinion on 9" vs Dana 60's. But despite the ease of gear changes in a 9", a Dana 60 will handle anything most people would ever need. Once the optimum gear ratio is known, the drop-out center benefit isn't that big of a deal. Besides, the expense of maxing out a 9" is astronomical.
dana 60's are for trucks 9s are for racing, you can't argue facts
A wider gear selection and the simplicity of a drop-out center section are THE ONLY benefits a 9" has over a Dana 60. Pros and a small percentage of hard core sportsman racers will benefit from a 9". Spend enough money and you can make just about anything stronger/lighter/faster than another competitive part.
But back on topic....
If rear end weight is a concern, most likely to go faster, then efficiency should also be a concern. If you install a heavier, but stronger and less expensive rear and don't slow down, it's worth it! If a Dana 60 will result in similar ET's over an 8 3/4", then it will certainly be faster than a Ford 9" which is heavier and even less efficient than an 8 3/4".
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Re: weight difference 8 3/4, 9 in and d60
[Re: Locomotion]
#1770142
03/03/15 08:48 PM
03/03/15 08:48 PM
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Joined: Oct 2007
Posts: 3,978 Hilltown Pa
1967dartgt
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Hilltown Pa
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Quote:
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FYI, while there are obvious weight differences, the Dana 60 is more "efficient" than an 8 3/4 rear. I've been told by several class racers that in most cases, there has been minimal, if any, change in ET. The Ford 9" is probably the least efficient of the popular rears and the Chevy 12 bolt is the best!
Are you trying to start WW III? Saying a 9" is the least efficient! Oh the humanity! LOL
It would be pointless to argue with the facts. As far as strength, I'm well aware of my old buddy Quicktree's opinion on 9" vs Dana 60's. But despite the ease of gear changes in a 9", a Dana 60 will handle anything most people would ever need. Once the optimum gear ratio is known, the drop-out center benefit isn't that big of a deal. Besides, the expense of maxing out a 9" is astronomical.
dana 60's are for trucks 9s are for racing, you can't argue facts
A wider gear selection and the simplicity of a drop-out center section are THE ONLY benefits a 9" has over a Dana 60. Pros and a small percentage of hard core sportsman racers will benefit from a 9". Spend enough money and you can make just about anything stronger/lighter/faster than another competitive part.
But back on topic....
If rear end weight is a concern, most likely to go faster, then efficiency should also be a concern. If you install a heavier, but stronger and less expensive rear and don't slow down, it's worth it! If a Dana 60 will result in similar ET's over an 8 3/4", then it will certainly be faster than a Ford 9" which is heavier and even less efficient than an 8 3/4".
So your not considering the double bearing on pinion, aluminum center section, the avaibilty of chromoly housings, bolt through main caps and the ability to back brace benefits? Weird I would consider all of them pluses.
Brett Miller W9 cnc'd heads STR Chassis fabraction
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Re: weight difference 8 3/4, 9 in and d60
[Re: wyldebill]
#1770144
03/03/15 09:02 PM
03/03/15 09:02 PM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
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Romeo MI
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sorry i asked.
Bee Crazy gave you some decent numbers.. but even Hot Rod said he brakes on the 9" were VERY heavy being they were the LARGE drums
W/O BRAKES W/BRAKES
12-bolt 171 210 Strange S60 191 230 Currie 9-inch 174 238
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