Bored TB's

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Bored TB's

This is a discussion about Bored TB's within the Suzuki Hayabusa section, where you will Some say Busa's Dominate; Is there much to gain on bored TB's (Gen1)? I imagine it depends on what motor you have. But let's say on a 1397 14:5, CNC stage2 and 425/415 cams. Jimmy

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    Default Bored TB's

    Is there much to gain on bored TB's (Gen1)?
    I imagine it depends on what motor you have. But let's say on a 1397 14:5, CNC stage2 and 425/415 cams.
    Jimmy

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    if i remember it was beetween 4 to 5 hp......
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    Check your pm

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    I was thinking the same thing
    slo poke

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    I would ask CNC, they'd know the flow characteristics of their port/combo.

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    One of my friends bored his throttle bodies on his 1397 motor back in 2004 and it did not change anything.
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    It depends on who did and how it was done...big difference....i remember when i tested mine.....back to back pulls on dyno...swapping tb's.....but hey...only my opinion......
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    Quote Originally Posted by SURPERNUT View Post
    It depends on who did and how it was done...big difference....i remember when i tested mine.....back to back pulls on dyno...swapping tb's.....but hey...only my opinion......
    True. Have seen some gain 10 - 13 hp

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    Quote Originally Posted by gotjuice View Post
    True. Have seen some gain 10 - 13 hp

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    Sounds inflated to me. I've never seen more than 2-4hp on bored tb on the dyno.

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    CNC claims as much as 7hp gain on stock motor zx14...and as much as 12hp on a built motor with a good head..atleast that is what ive read..Maybe jim will chime in with more info

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    U need to step bore them like they r now. The point of them bein this way is suppose to speed the air up goin in

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    On 1397 u probly won't see any gain but on a big motor yes they will help

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