[J.C.you]

Originally Posted by Scott Roberts

So what rpm does ur motor peak at?

CSA determines peak among with other factors including stroke, which I am sure you are aware of. The motor we are still working on is a class motor, built for a specific purpose, hopefully to have an advantage with current rules in that class. I don't think it is a fair assumption that because this engine currently peaks at 8100 or so means a shorter stroke build would do likewise.

I see no reason one could not take a 3.5 stroke or so with a 4.5 bore, a short valve v head such as Lynn's with the pushrod out of the port, move the cam lobes and lifter bores to straighten the angles and make power to 10k.
Would it make comparable power as a symmetrical port head? No, but to blankly say a tunnel port cannot make power past 9200 is not a good thing to publicly post. You may have to eat a cyber post.