International Waters Community

International Waters Gallery

Last additions - tnrcboatracer
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NR CF 3280138 viewstnrcboatracerFeb 19, 2008
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NR CF Squarewave pipe 174 viewstnrcboatracerFeb 19, 2008
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CF 3280 pipe for MAC/Valvola154 viewsThis pipe is a CF version of the OPS3280. Available in both MAC/Valvola/K&B front exhast, and NR/CMB rear exhaust styles. Standard head pipe is 0.527" ID. Reaming the head pipe to 0.565" for telescoping over the small MAC header is available for $5 upcharge. tnrcboatracerFeb 19, 2008
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NR Squarewave pipe designed by Rod Geraghty.142 viewstnrcboatracerFeb 19, 2008
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NR Squarewave pipe173 viewsThis pipe was designed by Rod Geraghty. Testing to date has been excellent. Available in both NR/CMB rear exhaust and MAC/Valvola/K&B front exhaust configurations.tnrcboatracerFeb 19, 2008
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MAC 21 CF pipe145 viewstnrcboatracerFeb 19, 2008
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Marty Davis designed MAC21 pipe.169 viewsThis pipe will only be available for the MAC/Valvola front exhaust engines. The design of this pipe is spec'd for 33,000+ RPM.tnrcboatracerFeb 19, 2008
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374 viewsMotor has ramped rotor for maximum case pumping efficiency.tnrcboatracerFeb 17, 2008
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297 viewstnrcboatracerFeb 17, 2008
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Side view337 viewsThe screws in the port runner secure a filler plate that reduces the depth (and thus volume) of late model MAC67 cases. The volume reduction increases the pumping efficiency of the motor and improves torque and accelleration. This mod is a real PITA, and Rod swears he will never do it again, but it is very effective. I have both motors that Rod performed this artristy on. tnrcboatracerFeb 17, 2008
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