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Thread: T5 help on a project car

  1. #16
    Newbie
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    Jan 2012
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    WV
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    What concerns me now is that the 2.8 disc is 9 1/8 and the 3400 disc is 9 5/8
    Will I have enough clamping area to keep that clutch in line given in running about 340lbft tq?
    Jaguar XJS: L67 swapped, slammed, gutted, 12psi

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  3. #17
    Light Throttle
    Join Date
    Sep 2012
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    148
    I'm using a 9 1/8" clutchnet 6-puck (stage 4) and it's holding over 400whp no problem. I'm using it in my 3500T/T56 car which weighs about 3000 lbs.

    The 3.4 clutch disc diameter is the same or very close to the same as a 3.8 disc. The flywheel can't accommodate anything larger AFAIK because the bolt circle is only about 10" in diameter.

  4. #18
    Light Throttle
    Join Date
    Sep 2012
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    148
    Beware though that the 6-pucks don't last nearly as long as a more streetable clutch.

  5. #19
    Light Throttle
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    Sep 2012
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    148
    Oh and for clarification there is no 3400 disc. 3400s never came with a manual transmission just the 3.4 RWD.

  6. #20
    Newbie
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    Jan 2012
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    WV
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    i wasnt aware that the 3400 and 3.4 were different aside from drive application
    Jaguar XJS: L67 swapped, slammed, gutted, 12psi

  7. #21
    Light Throttle
    Join Date
    Sep 2012
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    148
    3400 has aluminum heads, roller cam, improved oiling, superior head flow and intake design and 4-bolt cross-bolted mains with a structural cast aluminum oil pan.

    3.4 has restrictive iron heads and intakes, flat tappet cam inferior oiling and 2-bolt main bearing caps.

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