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Exhaust bore size

Discussion in 'Tuning' started by james0808, Jul 9, 2007.

  1. james0808
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    james0808 Active Member

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    [Jul 9, 2007]
    What sort of power can an exhaust of 70mm diameter handle before it becomes restrictive???
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  3. mat20vt
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    mat20vt Member

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    [Jul 9, 2007]
    was running 300bhp on 2.75inch exhaust.
    almost got round to running 400+ till crash.
    had big high flow cat from jabbasport, and 3" downpipe
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  4. james0808
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    james0808 Active Member

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    [Jul 9, 2007]
    Cheers fella,260 will be easy then.
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  5. mat20vt
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    mat20vt Member

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