Quote:
Originally Posted by kern417
What blends are in the E85 map pack? My BM3 E30 tune runs just as rich as the 93 tune. Some people are running E40-E50 with all stock fueling.
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The map pack includes Stage 1 and Stage 2 maps, both designated as E30.
The level of ethanol possible will be determined by boost levels at various RPM points, target AFR's at those same points and the individual car. With port injection cars the consensus target was 11.5 - 11.8 AFR on 93 fuel and 12.4 AFR for E85. For direct injection if we are at 12.5 - 12.8 AFR tuned for 93 then a low 13 AFR for E85 seems about right.
With the current HPFP limitations you can run higher E blends by ramping the boost profile and e.g. 12 PSI boost 2500 - 4500 RPM and ramp up after that as the cam shaft speeds increase, enabling the high pressure pump to flow more fuel.