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Engine/Power - EJ20T (pre-2006 WRX and JDM) There is replacement for displacement, it is forced induction - OEM 2.0 liter turbo engines in the USDM WRX. 90-94 Legacy Turbo EJ22 turbo engines can also be discussed here.

Throttle body porting

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Old 04-19-2004, 07:11 AM
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Throttle body porting
Has anyone ever done this to there throttle body? Porting Polishing knife edged? How about are Manifold. Has anyone done the porting and polishing with them? Thanks laters Mikal
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Old 04-22-2004, 07:35 AM
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Car Info: black my03 5mt wrx s/w
i did the throttle body bore, knife edged the butterfly, ground down the shaft, flattened the bolts, also smoothed out the leading edge of TB bore where it fits into short IC hose, and the leading edge(s) of IC elbows.

it cannot hurt!

ken
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