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Written by Wesley Mahler
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15.10.2006 |
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Rotary Engine Porting
Exhaust Porting
Lets not forget porting the exhaust also; we tend to not talk about it as much. In general when porting the exhaust they should be about 70-80% the size of the intakes. Although if your running nitrous oxide you’ll want to go close to 100-110% of the intake size. The exhaust port sleeves need to remain, except for 1974 rotor housings.
Unfortunately some of the new NA rotor housings have a baffled sleeve that is difficult to remove. So replacing those with turbo rotor housings are preferred. The exhaust porting in conjunction with the intake porting will have a tremendous impact on your engine’s power band. The rounder the boarder the torque curve will be, while a more square design increases noise.
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Last Updated ( 29.10.2006 )
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