Anton, check out this photo -
http://www.chiefdelphi.com/forums/pi...rrow=4&trows=3
You can see how they coupled the two motors together. I don't know they're exact ratio, but they told me that they tried to match the peak power curve for each motor. I think it's something close to 3:1, though, if not that exactly.
Nobody from Sachem actively posts on CD, but I am pretty sure at least one person reads it. Maybe they'd be willing to chime in and share.