throttle body bore

is there any way of finding out the bore on a throttle body? the TB i got with my LS1 motor has been bored but the guy can't remember how much. i'd like to try & figure this out before i start my swap. i'm guessing this is something i need to know before i get the motor tuned?

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Originally Posted by RPM Graphics

is there any way of finding out the bore on a throttle body? the TB i got with my LS1 motor has been bored but the guy can't remember how much. i'd like to try & figure this out before i start my swap. i'm guessing this is something i need to know before i get the motor tuned?

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It cant be bored more than a few mm. By bore, they mean smooth and clean up the inside. Its not really an issue. Just tell your tuner it has been ported and polished and you'll be good to go.

thanks man, that's kind of what i was thinking after really looking at it. it doesn't look bored, just polished.