I would say that 11.5 to one is a tad too rich. My EMS guy and I had a very interesting conversation about this on Tuesday.... he by the way does the setup and engine dyno's, or did rather, for Perez
Here's what he had to say about running too fat dumb and happy.... in a nut-shell, paraphrased, and I'd also like to add that this is ONE reason I think these engines spontaneously detonate.
Basically by running TOO rich you are leaving unburnt fuel in the combustion chamber, hanging on the rotor, seals, maybe even the housing surface itself. This is fuel, it's partially or completely vaporized and just waiting to be ignited. It's in the perfect environment as well. With the opening of port, incomes more oxygen, and all it needs is a little too much heat, or some exhaust gases to sneak by through the overlap or the trailing sparkplug hole and BAM - autoignition and bye bye.... game over. Is this likely to happen @ 11.5? Probably not unless your plugs are crap but how many people run around in the 9's and 10's? ALOT, how many people pop engines? What are the circumstances behind them? I'd love to study a TON of datalogs from blown engines and see if there is a pattern developing.
Of course he finished this off with..... I've never tuned a rotary to be street driven before though. My world with Rotaries starts @ C16
The guy has an impressive resume though. Alot of big name guys both piston and rotary, drag, circuit and road race all go to him so I think we'll make one pull at .825 and then go right back to .8