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How long would a 7 1/4" last... . . .
#1393825
02/26/13 08:33 AM
02/26/13 08:33 AM
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Joined: Jan 2005
Posts: 4,862
the frozen wastes...
Pale_Roader
OP
Swears too much
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OP
Swears too much
Joined: Jan 2005
Posts: 4,862
the frozen wastes...
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(dont laugh)
Behind a mild 383 and 3 speed? 3100-3200lb car.
Now, let me assure you, this is NOT something i would 'get into' or 'stand on' or even push much beyond normal daily driving. Just a last-ditch question from a (growing) desperate man that REALLY needs a car to drive.
My 6cyl Challenger needs an engine. The plan was the usual full deal... engine, 4 speed, 8 3/4", suspension, brakes, everything needed to build a big block car. I have all the parts save a few details. I have nothing for a slant 6, and i dont want a slant 6... i have ALL the big block stuff to bolt it in. The details are all in the rear... no 8 3/4" pig, no rear brakes, no driveshaft, and missing a couple key 4-speed parts. It would be SOOOOO easy to just bolt that 383 up to the 230 3-speed (already in the car and installed) and go for a drive. But would the rear last if i was REALLY nice to it? Again... just a temporary measure.
We killed a 7 1/4" in a 71 Duster in about a years time with a very tired ol' 318/auto... but we were really being tools about it. It gave us LOTS ov warning before it went too. That car weighed about 3400lbs.
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Re: How long would a 7 1/4" last... . . .
[Re: Pale_Roader]
#1393826
02/26/13 09:07 AM
02/26/13 09:07 AM
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Joined: Feb 2004
Posts: 1,834
Sault Ste. Marie, Ontario, Can...
moparmike1
top fuel
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top fuel
Joined: Feb 2004
Posts: 1,834
Sault Ste. Marie, Ontario, Can...
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You answered your question with your last statement. If you don't abuse it, it should last.
Post some pics of your Challenger. From what I remember you describing it as, it has very few, if any, options, right?
Mike.
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Re: How long would a 7 1/4" last... . . .
[Re: moparmike1]
#1393828
02/26/13 10:00 AM
02/26/13 10:00 AM
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Joined: Jan 2005
Posts: 4,862
the frozen wastes...
Pale_Roader
OP
Swears too much
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OP
Swears too much
Joined: Jan 2005
Posts: 4,862
the frozen wastes...
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Quote:
You answered your question with your last statement. If you don't abuse it, it should last.
Not really? There is a big difference, in HP and especially torque between a tired bone stock 71 318 and a healthy original 67 383 with intake, carb, cam and exhaust... But yeah, if i can just drive it like a normal human and listen to the lope for now around i'd be happy. I actually DO possess the restraint to not do burnouts and launches, or stoplight drags until i get the 8 3/4" in there.
Quote:
Post some pics of your Challenger. From what I remember you describing it as, it has very few, if any, options, right?
Mike.
It has only the 2 watt AM radio, bucket seats and wheelwell chrome trim as options... and i dont consider the first two to be options on an E-body. It didn't even get undercoated.
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Re: How long would a 7 1/4" last... . . .
[Re: horsepower.2007]
#1393829
02/26/13 10:03 AM
02/26/13 10:03 AM
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Joined: Jan 2005
Posts: 4,862
the frozen wastes...
Pale_Roader
OP
Swears too much
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OP
Swears too much
Joined: Jan 2005
Posts: 4,862
the frozen wastes...
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Quote:
I blew the spider gears right out the back cover on two totally stock 318 dusters with 7-1/4 rears.
Yeah... but you were trying REAL hard... Right? haha
My friend's Duster's 7 1/4" made a real mess when it finally gave too.
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Re: How long would a 7 1/4" last... . . .
[Re: Pale_Roader]
#1393830
02/26/13 10:18 AM
02/26/13 10:18 AM
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Joined: Feb 2004
Posts: 1,834
Sault Ste. Marie, Ontario, Can...
moparmike1
top fuel
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top fuel
Joined: Feb 2004
Posts: 1,834
Sault Ste. Marie, Ontario, Can...
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Quote:
Quote:
You answered your question with your last statement. If you don't abuse it, it should last.
Not really? There is a big difference, in HP and especially torque between a tired bone stock 71 318 and a healthy original 67 383 with intake, carb, cam and exhaust... But yeah, if i can just drive it like a normal human and listen to the lope for now around i'd be happy. I actually DO possess the restraint to not do burnouts and launches, or stoplight drags until i get the 8 3/4" in there.
Quote:
Post some pics of your Challenger. From what I remember you describing it as, it has very few, if any, options, right?
Mike.
It has only the 2 watt AM radio, bucket seats and wheelwell chrome trim as options... and i dont consider the first two to be options on an E-body. It didn't even get undercoated.
Yeah, I know the difference between a tired 318 and warmed over 383 but if you drove the 383 lightly, there's no reason the diff shouldn't last for a while.
Thanks for the pic.
Mike.
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Re: How long would a 7 1/4" last... . . .
[Re: moparmike1]
#1393831
02/26/13 10:33 AM
02/26/13 10:33 AM
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Joined: Jan 2005
Posts: 4,862
the frozen wastes...
Pale_Roader
OP
Swears too much
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OP
Swears too much
Joined: Jan 2005
Posts: 4,862
the frozen wastes...
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Quote:
Yeah, I know the difference between a tired 318 and warmed over 383 but if you drove the 383 lightly, there's no reason the diff shouldn't last for a while.
Well, i hope you're right... because if fortunes dont change around here very quick, it might just to come this...
Quote:
Thanks for the pic.
Mike.
Sadly it didn't look like that as delivered... i obviously added the rollers, deleted the wheelwell moldings, and the rake was created by jamming some wood between the diff and the body, otherwise the quarters would sit on the wheels... I do have new leafs and a practically NOS 8 3/4" diff (minus the pig and brakes) for it, but its the rest thats gonna cost me to install it, not to mention the time factor.
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Re: How long would a 7 1/4" last... . . .
[Re: moparmike1]
#1393832
02/26/13 10:37 AM
02/26/13 10:37 AM
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Joined: May 2003
Posts: 15,487
Florida
scratchnfotraction
I Live Here
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I Live Here
Joined: May 2003
Posts: 15,487
Florida
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I had one in a 68 Dart behind a 440 and it held up to daily driving for 3 yrs. but I drove it like a GranMa all the time. pulled the 440 and went 340 and then hammerd it for 2-3 months then spit the spiders out the cover doing a 1 wheel peel for 2 blocks...BANG! it drove well and would ride like the wind on the interstate but I never spun the tires with the 440 like that.  do what you got to do to keep from walking IMHO,just remeber you are never far from walking if you hammer it. 
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Re: How long would a 7 1/4" last... . . .
[Re: scratchnfotraction]
#1393835
02/26/13 10:43 AM
02/26/13 10:43 AM
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Joined: Jan 2005
Posts: 4,862
the frozen wastes...
Pale_Roader
OP
Swears too much
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OP
Swears too much
Joined: Jan 2005
Posts: 4,862
the frozen wastes...
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Quote:
I had one in a 68 Dart behind a 440 and it held up to daily driving for 3 yrs.
but I drove it like a GranMa all the time. pulled the 440 and went 340 and then hammerd it for 2-3 months then spit the spiders out the cover doing a 1 wheel peel for 2 blocks...BANG!
it drove well and would ride like the wind on the interstate but I never spun the tires with the 440 like that.
do what you got to do to keep from walking IMHO,just remeber you are never far from walking if you hammer it.
WOW. If you're being serious here, then i have nothing to worry about. A 440 is definitely excessive for a 7 1/4"!
Like i said, for now i could just be content to drive around, you know... GET to work... and impress the plebs with that sick Whiplash idle through the 3" Spintechs... And yes... i CAN BS my way out ov a race if need be... Had to do that for a YEAR in my 70 455 Skylark daily driver with a LOUD rod hammering away at the block... and i was an 18 year old punk then.
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Re: How long would a 7 1/4" last... . . .
[Re: Pale_Roader]
#1393836
02/26/13 06:01 PM
02/26/13 06:01 PM
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Joined: May 2003
Posts: 15,487
Florida
scratchnfotraction
I Live Here
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I Live Here
Joined: May 2003
Posts: 15,487
Florida
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I am serious. i drove it very easy with no heavy throttle at all. same deal needing to get to work and bring milk/dipers home. got another daily driver and pulled the 440 out and went 340. then it was  till it went bang! built the A-body 8 3/4 with moser axles,killed the dart and have had it in 2 trucks,it now has a 440 in front of it in the 88 truck. it can be done with a 7 1/4 but you will have to "want it too" **my disclaimer***..."result will vary" 
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Re: How long would a 7 1/4" last... . . .
[Re: Pale_Roader]
#1393837
02/26/13 06:06 PM
02/26/13 06:06 PM
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Joined: Jul 2008
Posts: 30,424
Florida STAYcation
dOrk !
The village idiot's idiot
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The village idiot's idiot
Joined: Jul 2008
Posts: 30,424
Florida STAYcation
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Quote:
A 440 is definitely excessive for a 7 1/4"!
NOT if you consider s4t's FL tune-up ! ...  
J/K
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Re: How long would a 7 1/4" last... . . .
[Re: dOrk !]
#1393838
02/26/13 07:11 PM
02/26/13 07:11 PM
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Joined: Jun 2012
Posts: 117
usa
franks lil red
member
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member
Joined: Jun 2012
Posts: 117
usa
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this guy thinks 71/4" are plenty strong sounds like the fan is rubbing a little.  link http://youtu.be/x5LF61q-Pko check out what the guy had to say.  i do feel  for the guy.
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Re: How long would a 7 1/4" last... . . .
[Re: Pale_Roader]
#1393840
02/26/13 07:43 PM
02/26/13 07:43 PM
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Joined: Jan 2003
Posts: 1,255
Columbus, GA
Michael Ecks
pro stock
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pro stock
Joined: Jan 2003
Posts: 1,255
Columbus, GA
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Quote:
I actually DO possess the restraint to not do burnouts and launches, or stoplight drags until i get the 8 3/4" in there.
Yeah...but what about all the people who owned it before you? There is no guarantee a part like that is only going to fail at a convenient and safe time like launching at a stop light. The 7 1/4 in my challenger went out not long after swapping in the mild 360 that lives there now. Ring gear carrier broke on one side and nearly twisted in half on the other, while shooting the spider gears out the back cover. It was dramatic and quite dangerous when it happened since I was going down a mountain road, rears locked up, car went sideways, etc.
If you want to run an old unit like that I would pull it apart and inspect it very well. Maybe even mag check it for cracks. No way I would try it with a big block though, but I guess it all comes down to your past experiences.
"The happiness of your life depends upon the quality of
your thoughts" ~ Roman Emperor Marcus Aurelius
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Re: How long would a 7 1/4" last... . . .
[Re: Michael Ecks]
#1393841
02/26/13 07:53 PM
02/26/13 07:53 PM
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Joined: Oct 2012
Posts: 1,106
Northeast
VincentVega
super stock
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super stock
Joined: Oct 2012
Posts: 1,106
Northeast
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That's the problem. And that sort of lesson does not just apply to axles. Imagine NEEDING to use power? Like to get out of the way of a big truck, or avoiding getting rear ended, or etc etc. And now imagine someone riding with you. And maybe things would have worked out, only your axle grenaded. You cannot predict and control what happens out on the roads, and setting yourself up to fail in this manner is unnecessary and dangerous to others.
Looking for 1975 through 1978 B body 4 door sedan sheet metal or parts cars - monaco, fury, coronet. Please let me know
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Re: How long would a 7 1/4" last... . . .
[Re: 469runner]
#1393843
02/27/13 07:53 AM
02/27/13 07:53 AM
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Joined: Jan 2005
Posts: 4,862
the frozen wastes...
Pale_Roader
OP
Swears too much
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OP
Swears too much
Joined: Jan 2005
Posts: 4,862
the frozen wastes...
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Quote:
Had a 440 in my 1970 barracuda, originally a 318 car with 7 1/4" rear. Drove that car for years, peelouts, no sure grip, but it surprised me how well it held up. Eventually rebuilt entire car and then put in a proper 8 3/4" rear. The 7 inch rear was still good when it came out.  Chrysler built all their stuff strong.
Yeah... i know a few guys that drag race mild to not so mild small block Chevy's with 7.5" rears, and many ov them have had good luck. But then again... thats an apple, this is an orange. One races a 400HP 350 with a 7.5" mini-spool and slicks at the track. He's blown it twice in three years ov racing.
Another 440 7 1/4" combo... Cool I guess it will do for now if it comes to that. Sure would be a LOT easier not to have to pull that tranny, shaft, rear and suspension right now...
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Re: How long would a 7 1/4" last... . . .
[Re: Michael Ecks]
#1393844
02/27/13 07:57 AM
02/27/13 07:57 AM
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Joined: Jan 2005
Posts: 4,862
the frozen wastes...
Pale_Roader
OP
Swears too much
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OP
Swears too much
Joined: Jan 2005
Posts: 4,862
the frozen wastes...
|
Quote:
Quote:
I actually DO possess the restraint to not do burnouts and launches, or stoplight drags until i get the 8 3/4" in there.
Yeah...but what about all the people who owned it before you? There is no guarantee a part like that is only going to fail at a convenient and safe time like launching at a stop light. The 7 1/4 in my challenger went out not long after swapping in the mild 360 that lives there now. Ring gear carrier broke on one side and nearly twisted in half on the other, while shooting the spider gears out the back cover. It was dramatic and quite dangerous when it happened since I was going down a mountain road, rears locked up, car went sideways, etc.
If you want to run an old unit like that I would pull it apart and inspect it very well. Maybe even mag check it for cracks. No way I would try it with a big block though, but I guess it all comes down to your past experiences.
This was a one-owner, grannied 6cyl car with good service records... odd are its as good as you'll find in an old car.
My friends went when he was doing 70MPH on the highway in the rain. That was bad, but could have been worse. Like i said... its only temporary. I'm not gonna be able to drive like a ninny forever...
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