So the only issue was the remote injectors which has turned out apparently to be a non issue as well. They work fine although no mention was made about throttle response.  

 

 

 The exhaust system as seen in photos is part of the dyno set up and I don't have the details. It does suppress the sound to tolerable levels. Today or tomorrow they will be testing the cool tube exhaust system that I built. It may cost some hp. we shall see.  

 

I've been interested in the muffler design as well, so this will be interesting.  Normally, you would expect to lose more power on a PP with a muffler, than you would on a normal ported engine.  Since the PP in question is smaller, and has less radical timing, all bets may be off on that behavior.   

I don't think you have any real numbers to suggest the p port will have poor milage if you take into consideration the power being produced. If you want to burn less fuel, throttle back to 200 hp.  

 

Absolutely right.  I'm only going by what I've been told, and trust to be true.  Again, that's for typical PP engines, which is not what you guys are making.  Unfortunately, none of us will know about the fuel efficiency until someone gets one flying.   

Back to the remote fuel injectors. Cool side injection is certainly possible in p ports and in my opinion should be a design goal for safety reasons. It may not work in side ports due to lower velocities in the runners.  

 

 

I have no question the remote injectors will work, but I do believe throttle response will suffer.  It might be well within your acceptable limits though.    

Time to give Paul Lamar credit for his huge effort in developing the p port to this stage. He has been very open about reporting difficulties along the way. Jerry