True, without dyno testing who knows what it does. So talk to someone who does dyno development work on rotaries - Tracy's not the only source of info around. Take a look at Paul Yaw's website - used to be lots of info there on intake and exhaust tuning. And he does all his stuff using dyno and flowbench testing. No guesstimating.

http://personal.riverusers.com/~yawpower/

Mike Wills

 

Mike;

 

I had a couple of discussions with Paul about the intake design before I had it built.  His opinion was that it should work just fine, and we talked about flow velocity (one of his favorite subjects).  Overall he thought that the easy breathing would compensate for lack of tuning, but I don’t recall that we discussed specific RPM.  There’s no doubt about getting power at higher RPM.

 

His testing has all involved ported or turboed engines, nothing directly comparable.

 

Al