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Discussion Starter · #1 ·
What are Hp Gains from smoothing/port matching the throttle bores? Has anyone one done just this? I in one way or another end up doing this with everything i own. 540 cid in boat 199 HD.

Has anyone doen the seat opants dynometer and noticed a difference. I see the giy that is extensively rebuilding his motor is/has done it. but hard to tell if any real gains. Just makes me feel better getting it all to flow as good as possible for the equipment that ya have at hand.....:eek:
 
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