Paul, What should be the length, diameter, thickness, material type, and
bend radius for the intake tubes for the normally aspirated Renesis?

Do you have any drawings of a completed intake setup?  Throttle body to
engine, injector ports, fuel rail, etc?

        I have a solid model designed up in CAD for a tuned intake for a
Renesis six-port. I'll start CNC machining the molds this week. It will
take awhile to complete and prepare all the molds because it is a
complicated geometry. I think I'm going to to make15 separate parts to make
the molds.

        My plan is to make a carbon-fiber composite intake that emulates
the stock six-port manifold that will hug the top of the engine (and clear
the cowling.) It will have the injector bosses located to use the stock
injectors and injector rail. Should weigh two or three pounds.

        The stock manifold makes 247 HP. I don't think I can improve on
that. Thus, I designed my composite manifold to have the identical runner
length, inside diameter, and junction point locations as the stock manifold
with all the valves open.

        I'd be happy to post a picture, but I'm not sure how that works on
this list.

        Bill Dube'

        RV-7 (wings, emp)
        Renesis six port


Good going Bill. That is just plain great. Here is a tip.
The stock RX8 manifold makes 247 HP at 8500 RPM. You will need a bit shorter
runners to get peak HP at 7500 RPM and of course you won't get 247
HP either. HP = RPM X Torque /5252 as I recall.
The other issue is if you remove the rotating sleeve in the
the big end housing ports you will need to use a slightly larger diameter
runner for those ports. Also people will need to do the JB Weld trick
to stream line them. On the other hand It might be possible to cut the
sleeve off and fix it in the port permanently.

Paul Lamar

The Rotary Engine NewsLetter.  Powered by Linux.
ACRE NL web site. http://www.rotaryeng.net
Copyright 1998-2005 All world wide rights reserved.