So I received my fuel content sensor and I installed it in the car today! It took me all day because I also re-did a bunch of wires that were bugging me and I also installed a bunch of power filters about the car. Oh yeah and I installed my new oil pressure gauge. The old one was not at all stable.
Its amazing, and a little disconcerting, to know that Haltech and Zietronix sell this same exact sensor in excess of $300 just re-branded. I purchased this one from Pace Performance for $82. They also have another version for $55. This plus the fittings and harness came to about $100. The lesson learned here kiddies is DO YOUR RESEARCH! and ye shall be rewarded. $200 was quite a savings and it allowed me to get the ProSport EVO boost and oil pressure gauges I've been wanting.
Now I am probably on the short list of people to fully implement flexfuel with the AEM EMS at this time since the firmware was only released little more than a week ago. Tuning it is insanely easy. The instructions that AEM provides are very well written and simple to follow.
Essentially they have a whole subset of tables for ethanol including Fuel, Ignition, O2 Feedback and Timing and includes a subset of all the start up tables and accel tables as well. You then transfer your fuel table to the flexfuel table and increase it by 35% for starters. Then transfer all of your other tables to the respective flexfuel counterparts. Then set the blending table so that 0% ethanol content results in using the standard fuel map only and 100% ethanol content results in using the flexfuel table only and interpolate in between so the 50% results in a 50% mix between the two tables. The timing, boost and O2 tables use the blending logic the same way. This assumes you have a fully tuned Gasoline map already. This gives you a great starting point to tune the flex fuel tables further for power or other strategies.
In my case though, we have gasoline that contains 10% ethanol already and I have it fully tuned for that content. So what I did to compensate was to increase the flexfuel table to be 33% greater than the fuel table versus 35% and I configured the blending table to start blending after 10% ethanol content and then interpolated it from there to 85% ethanol content thereby making E10 at 0% blending and E85 at 100% blending. I never plan to use E98 so my total blending range is 10-85% with a hysteresis of 75. At least this will give me a better place to start and I will be testing this fully with in the next week. But for all intents and purposes, my 1997 240SX is fully flexfuel capable
)
