Quote:
Originally Posted by luigi90210
OK so it would be an additional $200 for a E85 tune on top of the 91 tune right?
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Correct, on the same day. Flex fuel tuning, which requires mixing gasoline with ethanol to lower the ethanol content costs more. It would require tuning in around 10 to 20% content differences until we get to 20% since our gasoline already is around 7-10% ethanol content. Essentially flex fuel tuning requires tuning for 91 octane, E75-E85, E70-E60, E55-E45, E40-E30, and finally E20ish. We charge a flat rate for flex fuel tuning. It is very time consuming as cranking enrichments, ignition timing, and boost levels need to be adjusted. This takes more than a full day to do properly.
The trouble with using UpRev for both a 91 and E85 tune is that since the fueling is drastically different between the two it requires modifying the injector size. Under UpRev all 5 maps use one shared fuel injector size. This makes having 91 and E85 on one ROM impossible. One would need to reflash with a different ROM file for each respective tune.
The beauty with EcuTek when and if they release their updates will allow different injector sizes for each map\tune\mode. It will also allow us to run a flex sensor to output to the factory Nissan ECU and once tuned for all the different contents you can simply mix regular gasoline and ethanol and have the fueling and timing be correct. This way you don't need to stress out about the quantity of ethanol\gasoline currently in the tank and worrying about whether or not the tune your running is safe.
If EcuTek doesn't pull through let's hope Haltech does and releases their Pro-Plug-In ECU which will do flex fuel tuning and MUCH more!