Reading Jack&Jill description of carb settings has set me wondering how the ecu maps will deal with increased ethanol content. If the carbs need bigger jets then will the ecu map alter the injector timings in a similar way, i.e. increase the injection time by a few microseconds? For example, will the lambda sensors detect a variation and feed back to alter the fuelling ?
In some ways it is similar to using 95 octane or higher (97/99) octane petrol. As far as I can determine my Gems controlled engine has enough “intelligence” built in to cope with the petrol variation so likely to deal with ethanol variation in a similar way.
The only long term unknown is the effect of ethanol at 10% on the rubber fuel system components. Will it accelerate the normal age effects of rubber? Pure ethanol fuel might well do so but lower concentrations less so. I am looking for clear definitive test results conducted properly, not anecdotally or in ad hoc unscientific ways.
