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Thread: Mach 1 8 bolt crank is it the forged crank?

  1. #1
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    Mach 1 8 bolt crank is it the forged crank?

    Need advice.

    Is the 8 bolt manual transmission crankshaft the forged crank found in the 03-04 cobra motor?

    I hear finding the 8 bolt auto flex plate is hard to find...

    Is it worth buying a short block 04 with a 8 bolt( hoping this one is a forged crank) then going .010 and buy new forged rods and Pistons

    Need a answer quickly please

    Thanks guys
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  2. #2
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    8 bolt flexplate is easy. I can't confirm what crank will be inside - best to look and verify. I've read that they have the forged 8 bolt, but with Ford, you better see it.

    Worth buying? you know - sounds like just a core, if you are machining, buying rods/pistons etc.
    You can get a bare block then a forged rotating assembly...
    Depends on price, and truth it saves you money on a forged crank.
    I'd think, not leap, on it.
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  3. #3
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    450.00 shortblock with 8 bolt
    I'll have to check for part# for crank.


    He just pulled it from his car for built motor
    The twins2.3 whipple/aluminatorVortech V-2 lots of goodies

    Current marauders
    04 DTR totaled JUST NOW starting to part out 7-21-2021 https://youtu.be/REUxjP1BVpg

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    03 DBP Light Flint #122
    03 DBP Dark Charcoal #232
    03 Silver Birch 300b Light Flint Going to fix er up
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    04 Silver Birch Dark Charcoal moonroof in the works

    04 Heaton Swapped DTR
    Joe's Wrecked DTR rebuild thread

  4. #4
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    YES. The 8 bolt IS a forged crank, and the 8 bolt flexplate is not that hard to find.

  5. #5
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    hmm. well I bought the motor from a stick mach1 with the 8bolt. Its in my marauder right now. And it was hard to find.


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  6. #6
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    P.S. unless you are going 450HP plus, then the 6 bolt cast crank is just fine.

  7. #7
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    Quote Originally Posted by VA-Mach1 View Post
    P.S. unless you are going 450HP plus, then the 6 bolt cast crank is just fine.
    The stock crank is good for 550+

    Sent from my 0PM92 using Tapatalk


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  8. #8
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    Quote Originally Posted by VA-Mach1 View Post
    P.S. unless you are going 450HP plus, then the 6 bolt cast crank is just fine.
    North of 500
    The twins2.3 whipple/aluminatorVortech V-2 lots of goodies

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    03 DBP Light Flint #122
    03 DBP Dark Charcoal #232
    03 Silver Birch 300b Light Flint Going to fix er up
    03 Black 300a
    04 Silver Birch Dark Charcoal moonroof in the works

    04 Heaton Swapped DTR
    Joe's Wrecked DTR rebuild thread

  9. #9
    I've got the correct frpp flexplate somewhere in the classifieds.
    97 M8 5.0 6Speed

    Stock ? - yeah right ...

  10. #10
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    Quote Originally Posted by Chayton View Post
    hmm. well I bought the motor from a stick mach1 with the 8bolt. Its in my marauder right now. And it was hard to find.
    I just did a google search and in a about a second found one at Summitracing for $143.

  11. #11
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    Quote Originally Posted by VA-Mach1 View Post
    I just did a google search and in a about a second found one at Summitracing for $143.
    Nice! I went through this 6+ months ago and when I needed it no one, including head honcho at adtr could get it to me. Eventually I found one eBay down the street for $40. Good luck!

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  12. #12
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    Quote Originally Posted by VA-Mach1 View Post
    I just did a google search and in a about a second found one at Summitracing for $143.
    BTW that might be a new land speed record

    Sent from my 0PM92 using Tapatalk


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  13. #13
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    Quote Originally Posted by VA-Mach1 View Post
    YES. The 8 bolt IS a forged crank, and the 8 bolt flexplate is not that hard to find.
    You've been helpful!

    So, is there a different part # between the 03-04 cobra crank and this 8 bolt Mach 1 crank?

    Do you have either part #s that should be stamped on it?

    Man I appreciate it!
    The twins2.3 whipple/aluminatorVortech V-2 lots of goodies

    Current marauders
    04 DTR totaled JUST NOW starting to part out 7-21-2021 https://youtu.be/REUxjP1BVpg

    04 Silver Birch Dark Charcoal Hardtop Whipple Supercharger
    04 Silver Birch Dark Charcoal Hardtop V2 Supercharger
    04 Silver Birch Dark Charcoal Converted
    03 DBP Light Flint #122
    03 DBP Dark Charcoal #232
    03 Silver Birch 300b Light Flint Going to fix er up
    03 Black 300a
    04 Silver Birch Dark Charcoal moonroof in the works

    04 Heaton Swapped DTR
    Joe's Wrecked DTR rebuild thread

  14. #14
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    Quote Originally Posted by Chayton View Post
    BTW that might be a new land speed record

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    Quote Originally Posted by Turbov6Bryan View Post
    You've been helpful!

    So, is there a different part # between the 03-04 cobra crank and this 8 bolt Mach 1 crank?

    Do you have either part #s that should be stamped on it?

    Man I appreciate it!
    Sorry. I do not have the part numbers but as far as I know they are the same. Just the 03-04 Cobra block is cast iron and the Mach, Marauder, and Aviator are aluminum. Same heads with only very minor differences like 9 thread vs 4 tread for the spark plugs. The MM is probably the same with early 03's having 4 thread and late 03, and 04's having 9 thread. And Cobra's have Manly rods and forged pistons. The others have powder metal and hyper.

  15. #15
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    Quote Originally Posted by Chayton View Post
    The stock crank is good for 550+

    Sent from my 0PM92 using Tapatalk

    Way more than that from what I recall.


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