Will try the softer neg spring Marcos.
BTW,
For another comparison, here are the numbers from my #1 practice motor (I use it sparingly to get a feel for real race pace once the car is handling well) which I also took the time to "freshen" up, in the same manner as the CO27, and dyno last night:
RPM---TORQ---WATT---EF---AMPS
27066---3.6---72---68---15.0
25063---4.8---88---69---17.9
23746---5.7---100---70---20.0
21552---7.5---119---67---25.0
20334---8.4---126---64---27.9
19244---8.9---126---59---30.1