> Ok, so I finally took my spare engine apart (that I've had sitting in my
> garage from before I ever had my airplane flying).
>
> Rotor housings seem to be in a lot better shape then in my running
> engine. Which brings me to my question:
>
> Is any exhaust porting recommended?
>
> This is a 1986 13B NA. On my running engine I expanded the exhaust ports
> as much as the steel sleeves allowed.
>
> Finn

I would not mess with the exhaust ports unless you REALLY know what you are
doing.   I fully admit that I do not when it comes to exhaust porting, but I
don't think there is much to be gained at 6000 rpm or less.

I forgot to mention that all buyers of the EM2 get updated chips for their
EC2 at no charge.  You MUST supply the exact configuration of your EC2
however.  Must know coils used,  which gen crank angle sensor,  turbo or non
turbo,  two or three terminal ait temp sensor used, resistance of temp
sensor is a two terminal type.  Serial # helps too.

Tracy Crook