Which ports do you open up when you port a rotary?
03-16-03, 08:49 PM
#2
I port all of them. My T-II engine (4 port) has ports larger than what the Mazdatrix template uses. My exhaust ports use entirely new exhaust sleeves in addition to being ported for better flow. My 6-port engine is also much larger on all the ports than what the templates are marked at. How large you go should really be based on what you want the car to be used for such as fuel economy/emissions, just pure performance, rpm range, etc.
03-16-03, 11:05 PM
#4
There are different names for the intake ports depending on where you are in the world. More or less they are; stock ports, streetports (mild, extend) depending on how big they are, bridgeports (half bridge, full bridge, J-bridge, monster bridge) again depending on how big they are, and peripheral ports. Typically the exhaust ports either are or are not ported but again some port them to different sizes then others such as leaving them alone, opening them downwards, upwards, sideways, both up and down, all of the above. Some people remove the cast iron exhaust sleeves entirely and port these as big as physically possible. Some people call exhaust porting street porting or race porting depending on size. I just call it a ported exhaust ports. Larger isn't always better so if you decide to port yours do some research as to what will work best for your driving habits.
03-17-03, 12:36 AM
#6
The exhaust ports are peripheral while the intake ports are side ports. If you fill in the standard intake ports and move them directly adjacent to the exhaust ports you have a peripheral port intake. Capable of 300+hp naturally aspirated but not streetable with little low end power, terrible gas mileage, and poor emissions. Generally only seen on extreme racecars although a few people in Australia have used them.
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