Alan, it is true none of the official documentation mentions a rev limit of any sort but I’ve done the on track testing using two coils and my findings suggest that there is indeed a limiter on both coils (green and black). The data i am looking at is not off the mychron device itself, rather the traces when viewed on race studio analysis.
James I don’t see fuel type being the cause of this. I’m geared incredibly short at 11*81 and should be easily smashing past 14150 rpm but the engine clearly hits some sort of limit and oscillates up/down while the gps speed plateaus. The reason I’m after this is so i can gear shorter to benefit off the incredibly tight corners on our little track while not sacrificing top speed.
Marin jetting is spot on i am hitting 14150 all day long lap after lap with the green coil. On the black its 100 rpm less but same deal rpm just zig zags and the speed plateaus.