8 Inch Rear End - How Strong?

Discussion in 'Drag Racing' started by cometguy, Nov 10, 2009.

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  1. yellow75

    yellow75 MCCI Oregon State Rep Supporting Member

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    Splines wore out, this wasnt one of the $18.00 cheapies either. I was running a top loader and launching at 5,500 rpm on slicks though, might have has a little to do with it :) Also twisted the axle housing one time right at the spring perch. With an auto it would not be nearly as brutal.

    Went to a 9 inch and never had a problem after that even with a mini spool
     
    yellow75, Nov 10, 2009
    #16
  2. Derek 5oComet

    Derek 5oComet Tire burner

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    Derek 5oComet, Nov 10, 2009
    #17
  3. yellow75

    yellow75 MCCI Oregon State Rep Supporting Member

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    Yes it would be Dave Flett
     
    yellow75, Nov 11, 2009
    #18
  4. Rick

    Rick G8I operations

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    Here's was mine after the caps failed
     

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    Rick, Nov 11, 2009
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  5. Blown 5.0

    Blown 5.0 Hooked on BOOST MEMBER

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    Looks just like mine except mine broke thru the adjuster screw holder bolt hole. (wow say that three times fast) Looked almost like they were cut in to with a band saw.
     
    Blown 5.0, Nov 11, 2009
    #20
  6. cometguy

    cometguy Member

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    cometguy, Nov 11, 2009
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  7. Racerb

    Racerb New Member

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    Anyone make after market axles for the 8" running a mild 302/348 with C4 mid to high 12.0's
     
    Racerb, Nov 21, 2009
    #22
  8. maverick maniac

    maverick maniac Banned

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    yep strange and mossier both make 28 spline axles
     
    maverick maniac, Nov 21, 2009
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  9. td8

    td8 New Member

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    Both 8in an 9in axles are the same. The 8in pinion shaft is smaller than the 9in. Moser engineering makes axles up to 40 spline but the problem with the 8in is a spool. You can get a 31 spline mini spool but I have never seen a full spool for a 8in.
     
    td8, Dec 7, 2009
    #24
  10. CornedBeef4.6L

    CornedBeef4.6L no longer here

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    In some cases it's the weak main cap bolts that allow the caps to walk and break. In other cases I have seen the pinion push them out due to a weak pinion carrier. My father ran them behind big block 427/429 in a 4 speed fairlane with good luck. To my knowledge he only grenaded one. They are stronger than some give credit if you address the aforementioned issues......It's in the air right now I have a Currie ALumin8 carrier but I may go with a quick change 9 inch in my car........
     
    CornedBeef4.6L, Dec 8, 2009
    #25
  11. jayss10

    jayss10 This is Minerva

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    ive had a 8 inch in mine i 1.55 60 ft ,havent had any problems yet it has a mini spool stock axels ,im going to mosier this winter ,but will probably leave the mini spool
     
    jayss10, Dec 8, 2009
    #26
  12. maverick88tc

    maverick88tc Member

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    i have never ran the 1/4 but my turbo car ran a 8.00 in the 1/8th with a 6500 rpm launch and i even sprayed it a couple times but it just spun i have a mini spool (15$) and stock axles with a diy setup without the proper tools just did it by feel and by ear . but that is like a super low 12 in a turbo car with a 5 speed
     
    maverick88tc, Dec 8, 2009
    #27
  13. murphy88

    murphy88 Member

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    I have me a 8" detroit locker with 410 gears..I will find out this summer what it will take ..lol
     
    murphy88, Dec 11, 2009
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  14. 71gold

    71gold Frank Cooper Supporting Member

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    ...and what times are you running with this setup?
     
    71gold, Dec 11, 2009
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  15. Ol Maverick Man

    Ol Maverick Man Member

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    I had a 8 inch rear in a 1933 Plymouth coupe with a 440 and auto transmission. I made sure the slack was out of the driveline and ran a 1.70 60ft. time. Never had a problem
     
    Ol Maverick Man, Dec 12, 2009
    #30
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