Im a machinist in a machine shop so i have pretty much every machine at my disposal... Is it possible to bore my own TB? if so what size and is it bored at a taper or straight through? what about the butterfly plate? will i have to make a larger one to close off the larger bore? Thanks for the help... Hult250R
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I used to have a 420A...
'92 TSi AWD
11.8 @ 119mph 470awhp 405 ft/lb torque 30psi on E85 w/ Borg Warner S256 Turbo
#21514, "RE: boring my own TB??" In response to Reply # 0
Since this is your first wack at it, I wouldn't go too extreme (yet). Bore it out to 55mm, straight through. Yes, you will need to make a new butterfly plate.
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