I must say I agree with Tracy on this, after looking at both, the only difference been power seems ( to me) to be as a result of the complex porting. As this will be scrapped for a 'home-brew' port arrangement, I believe the 4 port will be a lot easier to work on - for the average builder!

An added advantage is the 4 ports are for automatics ( mostly , I believe) and have the flexplate and counterweight included.

George (down under)

 

Yep, that was a big factor in why I chose the 4 port "low power" engine.  Much simpler manifold requirements.

 

Tracy

----- Original Message -----

From: BillDube@killacycle.com

To: Rotary motors in aircraft

Sent: Monday, May 30, 2005 7:38 PM

Subject: [FlyRotary] RX-8 6 port Intake - Like, complicated....

I have been studying the intake system on my 6 port RX-8. It is MUCH more
complicated than I anticipated. Not only does it have an Auxiliary Port
Valve (APV), it has a Secondary Shutter Valve (SSV) and a Variable Dynamic
Effect (VDI) valve.

>snip<