Kevin,
        > JDM is short for "Japanese domestic market".  These engines
        and other
        > items are from autos that were built to be sold in Japan.
        The
        > suppliers usually say that the inspection requirements in
        Japan are so
        > stringent that often the engine is changed with only 50k or
        60k
        > miles as the cheapest way to meet the inspection criteria.
        Does
        > anyone know if this statement is valid?  Also, I'd like to
        hear what
        > comments anyone may have regarding the Cosmo 13b REW engines
        as a
        > starting point for an aircraft conversion.
        >  
        > Aubrey
        
I'm using a '93 JDM 13BREW as the basis for my conversion. I don't
have any  way of knowing if it came from an RX-7 or a Cosmo. I am
going normally aspirated, but the rest of the engine is close to
stock, with the exception of Bruce Turrentine's recommended oil jet
modificaton and thermal pellet bypass. We'll see how it does, I hope
to be done in 3 months or less. 
 
At this point, I'd have to say if I were to do it all over again from
scratch, I'd go with  a P port engine. But other than that,  I think
that it is a promising engine. We'll see.
 
Brian Trubee