1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

Lower compression 13b rotors...

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Old 10-16-07, 01:43 PM
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Originally Posted by diabolical1
it's when you basically turn a 6-port into 4 by combining the secondary and auxiliary ports on the front and rear side housings.
That's what I figured, but have heard horror stories about the torque band after it's performed. Too much airflow for the RPM range I'll spend most of my time in.

Originally Posted by diabolical1
that's the smart move.

Thanks stressing the benefits of porting, I've been planning on this from day one after seeing dyno results and hearing about the power increase from experienced members in the first gen section, then after studying this forum as much as possible, I do believe EVERY rotary that I have built/finally build on my own will ALWAYS have intake and exhaust port modifications to increase airflow. I've done my own port work on piston engines before, but porting a rotary is kinda like building your own camshaft and valvetrain compared to a piston engine-something I'm not 100% confident in my ability to do yet without a living, breathing coach to guide my through every step in person. One day I'll be answering questions like these for rookies-the "family" I've joined here has made me feel completely comfortable and taken me under their wings so much so that I know I'll always own a Mazda rotary-powered vehicle for the rest of my life (most likey an FB). I love the members of this section almost as much as I love my car (ALMOST I said-and not THAT way you dirty-minded fools). You guys are tight-knit family, and I'm proud to say that I belong to this part of the forum. Thank you guys!
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