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Thread: Auto Mach 1's

  1. #1
    Senior Member scott5's Avatar
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    Auto Mach 1's

    Whats the bottom end good to?

  2. #2
    adult daycare speedracer's Avatar
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    Quote Originally Posted by scott5 View Post
    Whats the bottom end good to?
    Less than the 5 speeds

  3. #3
    Authorized Mod street591's Avatar
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    ^+1

    The manuals have a steel crank but the autos don't. Manuals blow apart anywhere from 475-530 depending on your setup.

    Autos are even less...probably around >450.
    2004 Black GT
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    2003 Black SVT Cobra (11k miles, E85, 2.3 whipple, 22psi, 700+ RWHP) FOR SALE!
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  4. #4
    Member Mark Aubele's Avatar
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    Quote Originally Posted by scott5 View Post
    Whats the bottom end good to?
    413.743 rwhp give or take a thousandth
    2014 Mustang GT Stock and for sale
    2014 M235i (wife's)
    1964 Ford F-100

  5. #5
    Senior Member scott5's Avatar
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    I know the difference in 5spds are 8 bolt forged and auto 6bolt cast..

    Got a trade offer of a stock sy auto mach 1 last night for my car so i wanted to know but it seems they are the ssme

  6. #6
    Authorized Mod street591's Avatar
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    Quote Originally Posted by scott5 View Post
    I know the difference in 5spds are 8 bolt forged and auto 6bolt cast..

    Got a trade offer of a stock sy auto mach 1 last night for my car so i wanted to know but it seems they are the ssme
    Yours isn't a 4V...
    2004 Black GT
    2009 Black Jeep SRT8
    2013 Race Red Boss 302
    2003 Black SVT Cobra (11k miles, E85, 2.3 whipple, 22psi, 700+ RWHP) FOR SALE!
    2009 White 6.4 F250 SOLD
    2008 Black TL-S SOLD
    2006 Black R1 Raven SOLD
    2002 Black SVT Lightning SOLD
    2003 Red Mustang SOLD

  7. #7
    Nothing clever to say.... jaa55's Avatar
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    I would say the cranks not the problem.......more of a piston and rod issue in both auto and manual
    03 Torch Red Anni. Ed. Cobra

    11 Grabber Blue 5.0, 3D500 spoiler, CS valance, GT premium, interior upgrade package, Brembos, MT-82 and Whipple powered SOLD

    01 cobra: traded

    93 LX Modular 4v swap
    Sean Hyland Motorsport forged rotating assembly, Teksid block, 01 cobra heads, cams and intake SOLD

  8. #8
    The stock crank in the auto is cast and the 5 speed is a forged unit but that is not the problem. The cast crank is plenty tough. The stock pistons and rods are the weak points. I would not push an auto car past 400-450 at the tires.
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  9. #9
    Senior Member scott5's Avatar
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    Quote Originally Posted by street591 View Post
    Yours isn't a 4V...
    but the bottom end is still only going to last to the same point is which I meant by saying the "same"

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