Please check my understanding (which is very little) of these issues. I'm trying to put together everything I've read here. Hopefully I have it right or mostly right.

12A & most 13B rotaries have four intake ports. Two primaries and two secondaries. The primaries run at all times and the secondaries are opened via the carbuerator butterflies at a designated demand via the throttle. There are two openings in the side of the rotar chamber, one for each port.

GSL-SEs have 6 ports. Two primaries, always active again. Two secondaries operated by demand through the fuel injection housing somehow. I imagine a butterfly valve again. The 5th and 6th ports open through sleeves in the intake manifold and are acitvated by exhaust back-pressure. I don't know where these ports funnel to.

Some people remove the 6 port sleeves all together at the risk of low end torque though most argue no noticeable loss.

Some people add Pineapple sleeve inserts and swear by them. Others swear at them.

6 port engines don't like porting.

There are three ways to port a rotary: Street, bridge, and peripheral. Street porting is enlarging the two port openings into the chamber. Bridge porting is adding a third opening above the regular ports. I don't know which port (Primary, secondary, auxilary) supplies these. Peripheral porting I have no clue what it is.

Do I have this right so far or am I way off base? Feel free to correct any misunderstandings and outright falsehoods. I'm sure there are pleanty.

Now for my questions:

What operates the secondaries in a six port motor?

Where do the 5th and 6th ports end up? In one of the other two openings in the rotor side plate?

What will really happen if I removed the sleeves? What is the good and what is the bad?

What could be wrong with the pineapple inserts? Seems like a good thing all around.

Why don't 6 port motors like porting?

What is peripheral porting?

What are the differences and benefits to the different porting methods? Why would I choose to do one or the other?

There are only two exhaust ports on any motor right?

Thanks in advance. I have much to learn yet.

 

Read this. http://www.rotaryengineillustrated.c...-ports101.html

 

Thanks REVHED. Very informative. Am I to understand that the Primaries and Secondaries both feed into the first lower intake port in the side housing while the six port engines are the only factory engine to have the second cut out in the side housing?