I am not an engine guy, just a crew chief & racer who runs an esslinger XT.
It seems that to me the issue of RPMs, with respect to an Esslinger is more about where you are in the RPM/power band getting off the corner? Not at the end of the straight for a brief moment. Given they are torque challenged on short tight tracks. How many guys really run IRP, Iowa or Phoenix? Why all the emphasis on HP developed? Yes its a means of measurement. However we found we turn up the RPM's when competing to get up on the cam or the torque curve to get off the corner better.
So I have to ask doesnt any one think the R & D guys down there dont know what to do cam wise and phasing wise to shift the power band down in the range now allowed by this rule? Bet they do or they will find it this winter. Remember when NASCAR instituted RPM limits? Do those motors make any less HP? Nope.... theyre better than even before and all it took was lots money.
So.... I think the big guys will send their motors in late winter to get those R & D benefits. Sorry if I didnt offer a solution but I dont think this new rule is the right one in this case. Maybe it will help the pushrod motors live longer but.....Wont save any money for guys who own the stuff already.
Just my .02 cents worth.