im new to the rotary and have heard alot about "porting". it keeps popping up in places and im dyeing to figure otu exactly what it is. i think i have a general idea but would just like to be sure and have a mroe in depth understanding how how it works and such. thanks for you help :]

 

http://www.geocities.com/MotorCity/P...8/porting.html
http://www.fortunecity.com/silversto.../rx7facts.html
http://home.iprimus.com.au/bluey3/portsPage/ports.htm
http://www.mazdacomp.com/rotaryengines.htm

 

thanks alot. i really apreciate it. but one more thing? i still hear about 4 ports and 6 ports.. lil help? :]

 

TURBO 4PORTS NON TURBO 6PORTS

 

Not quite true


Early 13B's had 4 ports

All production 12A's have 4 ports

13B's as fitted to 2nd gen N/A's have 6 ports

13B turbo's have 4 ports

The six ports were used in a similar way to the VTEC cam system on the hondas .... when the engine reaches a preset RPM/load level the extra ports open up allowing the engine to breathe better and make more top end power.

This is a benafit as they are closed at low rpm's so the engine produces good torque at low Rpm's too.

Well thats how I see it working anyway

Mike.

 

EXACTLY.

although Japan did have a "production" 6-Port N/A 12A motor for a limited time..
(Directfreak ducks and runs..)

 

BAAAH ! The Japanese get all the good stuff !

You guys did get 13b engines in 1st gens though ...

where as Japan had to "make do" with "just" a production 12a Turbo

 

directfreak you forgot that the 84-85 gslse came with 6 port

 

I thought they had 4 ports ???????

20B's have 6 ports