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    Author Topic: 8 3/4 Strength  (Read 3968 times)

    nivvy

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    8 3/4 Strength
    « on: January 06, 2008 - 09:08:00 PM »
    How much HP is a 8 3/4 good for ???
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    Offline Oldschool

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    Re: 8 3/4 Strength
    « Reply #1 on: January 06, 2008 - 09:51:56 PM »
    It's not so much how much power will it handle, as much as it is HOW you apply it.  The heavier the car, slicks, or manual tranny sidestepping the clutch.  That combo will kill it pretty quick.  If you have a medium weight car with an auto and just a little wheelspin, it will be almost indestructable.  An auto applies the power relatively slow compared to a manual.  Bottom line, the less "shock" you give the rearend, the longer it will last...    :2cents:    :cooldancing:   
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    Ken  --  In Georgia

    MOPAR-------"Built To Run------Here To Stay"

    Offline 426HEMI

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    Re: 8 3/4 Strength
    « Reply #2 on: January 06, 2008 - 09:55:26 PM »
     :iagree:   :2cents:  I had one in my 440-6 and it was just fine and it was not stock.
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    Got a pretty good start on my M46 optioned Barracuda restoration but now it is on hold till I can gather more funds.  Still need a few parts for it.  SIU Graduate 75 AAS Automotive Tech, 94 BS Advanced Tech Studies, 1997 MSED Workforce Education and Development

    1970 M46 Barracuda
    1998 Dodge Darango

    Gordon

    nivvy

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    Re: 8 3/4 Strength
    « Reply #3 on: January 06, 2008 - 10:19:34 PM »
    well you guys know what i have 650+hp ... 727 ... thinking of throwing a 200 shot at it ??? really ow affetiv i bracing ??? im thinking of going dana 60..
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    Offline CrazyPete

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    Re: 8 3/4 Strength
    « Reply #4 on: January 07, 2008 - 07:56:47 AM »
    mine has broken several times usually the pinion was the problem anything from twisted splines to totally snapping the pinion off.  But i know several guys running alot more hp than i did that have never had issues.  All i can tell you is NEVER buy ZOOM gears there junk.
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    1970 Dodge Challenger T/A      http://heartlandmopars.com
    1970 Plymouth Barracuda Gran Coupe
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    Offline Oldschool

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    Re: 8 3/4 Strength
    « Reply #5 on: January 07, 2008 - 08:16:51 AM »
    I would recommend Moser, Richmond Gear, or Strange Engineering for rear gear stuff...    :2thumbs:   
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    Ken  --  In Georgia

    MOPAR-------"Built To Run------Here To Stay"

    Offline ShelbyDogg

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    Re: 8 3/4 Strength
    « Reply #6 on: January 07, 2008 - 11:49:15 AM »
    My race car with 500 hp (not much) and slicks on a sticky staring line tore those gears up.  Rips them right off of the ring or pinion.  My car was only 2300 lbs. Put a DANA in it and ran for 8 more years till I sold it.
     In my opinion, you need a DANA. Stroker, you are right on the verge of blowing up that puny 8-3/4.    They will only hold up till you get some serious traction, them BOOOOM!

    Rob
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    Rob

    3 E-bodies, Megasquirt-1v3.0, Edelbrock Pro-Flo-1, Holley C950, FAST EZ-EFI; say no to carbs...yes to throttle bodies

    My Pace Car restoration thread:
    http://www.cuda-challenger.com/cc/index.php?topic=44869.0

    Offline Jacksboys

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    Re: 8 3/4 Strength
    « Reply #7 on: January 07, 2008 - 12:29:50 PM »
    Quote from: shelbydogg on January 07, 2008 - 11:49:15 AM
    Stroker, you are right on the verge of blowing up that puny 8-3/4.    They will only hold up till you get some serious traction, them BOOOOM!
    :iagree:

    With that much power, I would consider a Dana.  I have an 8 3/4 in the Dart I use to race and it handled a 440 (about 450hp) with an auto and using the footbrake only.  I would not risk another 200 shot without a larger rear.
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    1971 Dodge Challenger:  360/904/3.23
       
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    Offline Chryco Psycho

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    Re: 8 3/4 Strength
    « Reply #8 on: January 07, 2008 - 12:31:48 PM »
    If you have to spend $$ to fix the diff I would starts spending $$ on the dana
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    Challenger - You`ll wish You Hadn`t

    Offline Carlwalski

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    Re: 8 3/4 Strength
    « Reply #9 on: January 07, 2008 - 02:30:07 PM »



    Go for the Dana if not for the added strength then the peace of mind. Two words: Dr Diff. :2thumbs:


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    1970 Dodge Challenger R/T
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    nivvy

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    Re: 8 3/4 Strength
    « Reply #10 on: January 07, 2008 - 03:49:49 PM »
    how much does the brace really help???
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    Offline ShelbyDogg

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    Re: 8 3/4 Strength
    « Reply #11 on: January 07, 2008 - 05:06:02 PM »
    The brace will only help if you're trying to twist the center section out from between the axle tubes. The ring gear will break befroe that happens on an 8-3/4.  It isn't needed in a Dana at all. The most I added to my DANA was steel caps. I ran a tranny brake and held it to 4000 Rpm while the lights came down. I never hurt it at all.  I was running 16.5-33" slicks too.
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    Rob

    3 E-bodies, Megasquirt-1v3.0, Edelbrock Pro-Flo-1, Holley C950, FAST EZ-EFI; say no to carbs...yes to throttle bodies

    My Pace Car restoration thread:
    http://www.cuda-challenger.com/cc/index.php?topic=44869.0

    Offline 426HEMI

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    Re: 8 3/4 Strength
    « Reply #12 on: January 07, 2008 - 06:17:38 PM »
    Quote from: Carlwalski on January 07, 2008 - 02:30:07 PM


    Go for the Dana if not for the added strength then the peace of mind. Two words: Dr Diff. :2thumbs:




    I would love that setup.  It would be really cool to have.  How Much?
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    Got a pretty good start on my M46 optioned Barracuda restoration but now it is on hold till I can gather more funds.  Still need a few parts for it.  SIU Graduate 75 AAS Automotive Tech, 94 BS Advanced Tech Studies, 1997 MSED Workforce Education and Development

    1970 M46 Barracuda
    1998 Dodge Darango

    Gordon

    Offline MEK-Dangerfield

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    Re: 8 3/4 Strength
    « Reply #13 on: January 07, 2008 - 06:39:50 PM »
    Quote from: 426HEMI on January 07, 2008 - 06:17:38 PM
    I would love that setup.  It would be really cool to have.  How Much?

    I'm guessing you don't want to know.   :smilielol:


      Mike
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    Mike

    1970 Challenger - SOLD
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    Offline Carlwalski

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    Re: 8 3/4 Strength
    « Reply #14 on: January 07, 2008 - 07:57:03 PM »
    Quote from: MEK-Dangerfield on January 07, 2008 - 06:39:50 PM
    I'm guessing you don't want to know.   :smilielol:


      Mike


    I don't want to know either. :lol:

    Don't really like to speak prices but I consider it a competitive price. You pay for what you get.  ;)
    If you're really keen and would like one check out Dr-Diff's website: http://members.aol.com/doctordiff/dana.html


    :cheers:
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    1970 Dodge Challenger R/T
    White, License Plate, 0A-5599
    540ci Aluminium Hemi, F.A.S.T EFI
    TF-727 Gear Vendor OD, Dana 60
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