It used to idle beautitfully at 750 RPM, just as it does in the car. That was when I had the stock intake manifold. About a year ago I made a new intake manifold, now it runs a little rough below 2000 RPM, there must be a pinhole leak in the system somewhere that I haven't been able to locate. Yes, I still use the stock ecu and fuel system. My new intake manifold stole a piece of the stock that the secondary fuel rail bolts to, so I still use the stock fuel rails too. I eliminated the two oil injectors that were in the manifold but retained the two in the engine, I figure you can't go wrong with oil drops being placed right on the apex seals. I also mix 2-stroke with the fuel.

On my recent long trip, burned 7.5 gph @ 5200 RPM average, not bad considering I think the ecu is running it rich. Works out to about 20.5 mpg.

Anything below 2000 RPM isn't really useful anyway, It takes about 2200 RPM to taxi.

Barry Gardner wrote:

I'm wondering what Perry Mick idles at, given his use of the stock Mazda
engine computer.

Are you also using the stock manifold and fuel system?

Want to fill in some data for us, Perry?

Barry Gardner
Wheaton, IL

----- Original Message ----- 
From: "Ed Anderson" <eanderson@carolina.rr.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Saturday, March 27, 2004 7:54 AM
Subject: [FlyRotary] Re: It Still Runs


  

Sounds like you are doing the right things, Steve

My engine idles between 1800-2000 rpm and I believe Tracy's does the same.
Without a flywheel and load prop mass, it needs a bit more rpm to be
    

smooth
  

than say an Automobile.  With my newest manifold it will actual idle close
to 1200 rpm, but it is not smooth and sounds like it may want to quite, so
    

I
  

set it higher.