Rusty, The p port sucks in a lot more air than does the side port. I don't know what the stock timing is so I don't know how much is timing related. I think it just a much more efficient to pulling air in directly than through a convoluted passage through the side housing. Jerry




On Saturday, March 26, 2005, at 08:56 AM, Russell Duffy wrote:

That is exactly what will happen. The p port will deliver more HP at the same RPM. 
 
Will this strictly be due to having a larger intake port, or is it due to timing? 
 
I personally can't wait to see Renesis engines running with some porting work on the stock ports.  From the pics I've seen, the factory leaves them really ugly.  I bet once they're smoothed out, and opened up some, it will be a killer engine.   I also think there will be even less reason to consider PP on the Renesis, than on the 13B.  Heck, the more I look at it, the more I (almost) wish I had just made the change to Renesis for the RV-3. 
 
Cheers,
Rusty (fiberglass pieces finally coming together today)