07-06-2012, 12:34 PM #101
Hey guys, there's an e85 discussion going on elsewhere and then the issue of fuel trims maxed(near Max) was brought up and then joshboody brought this up(I know he doesn't have many fans here, but the guy is pretty sharp IMO)
MOTIV750, MOTIV P-1000 PI, MOTIV/FUEL-IT! low pressure fuel system, AEM EMS/COBB AP, Aquamist HFS-3, ETS FMIC, SPEC stage 3+ clutch/SS flywheel, BC Racing coilovers and VMR wheels wrapped in Hankook RS3s.
07-06-2012, 12:48 PM #102Supporting Vendor
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For flash tuning on E85 ideally you'd need an rpm/load/lambda/IPW reference table. With a piggyback you can work around that by fudging the fuel pressure signal and/or fudging the load values.
On the flash end I don't see any easy way to work around the fuel trims issue without having the proper tables at hand. But it might not be a big deal with say a 40% E85 mix. The DME is aware of actual load so it's going to be in the ballpark and you do have a +34% trim factor to work with. As a starting point I might take their S2+ aggressive map, bump advance up to the OEM levels, lean AFR out to the OEM levels, and then gingerly evaluate on a 40% E85 mix.Burger Motorsports
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07-06-2012, 09:31 PM #103
That's exactly what you with ATR now, work under the 34% cap at a 40:60 mix of E85. Any more than 40% and I personally smash into the 34% ceiling. I keep hearing cobb is working on a way to tune for more fuel, it's only a matter of time before cobb supports 100% E85 tuning.
07-06-2012, 09:35 PM #104