ive ran e85 as rich as 10.5 AFR on a gasoline wideband downlow and gained torque and RBT is said to be around 10.5 AFR on e85. then uptop ive ran it as lean as 12.5 AFR. I target 11.9-12.1 afr, and seems to pull smoother uptop. sometimes cars make more power with leaner also.

When running it richer say 11.1 across the board vs 12.1 there is a slight difference uptop.. maybe 30whp or so (varies), but not enough to throw the tune off. but its wasting gas and e85 mpg is bad as it is, running it at 11.1 WOT is horrible mpg.

I dont know e60, hopefully Dave will respond to you, im sure hes delt with it before.

If you can pass max timing with e60 then theres your answer, but i only ever ran e85.

 

The ideal solution is to use a flex fuel sensor and have a 3d map which will compensate from pump gas boost and timing numbers to e100. Right now a lot of guys are doing this on the big $$$$ buids with Supras, Vipers, Vettes, Gallardos and other such high $$ cars. The sensor is not cheap and neither is the ecu to use the 3d tables. Right now I think Motec M800 based ecus are the "gold standard" for these tunes. In a less than perfect world you can tune for one concentration and if you notice your afr varying outside a predetermined limit you would know you have a different mixture. I would start with the highest concentration you run since more gas would run richer and be safer than leaning out. Just log your afr and pay attention after a fillup and see what you have.

 

We do similar calibration for catalyst efficiency maps over a wide sweet of temperature ranges.

Makes me want to dump the money for a Motec, Vipec, or Pectel ECU... but then again not!

 

ya i wish the stock ecu had better correction tables so we could actually force it to keep a consistent tune in any weather (afr wise) but i guess thats asking for to much. some standalones you can make it target certain afr's and it will auto correct right?

 

I'll get that E85 test tube eventually just to see what the station where I fill up is at I think the station I fill up at has the lowest ethanol content out of 10 stations we have here in socal My friend goes to a E85 station in san diego and the label says "85% ethanol content minimum" and he filled up at the station I go to and he did a couple WOT and on last run he blew his motor..............


Forgot to mention the station I go to says "70% ethanol content minimum" I still made good power on it though

 

ProEFI has the ability to adjust timing based on ethanol content.

Pretty advanced ECU:

http://www.youtube.com/watch?v=a1CzmmMUy50

I was debating on running this system, but the number of tuners is so limited, and e85 isn't too redily available in my area.


If I do go e85, I'd just get one 55 gallon drum, test the e85 before filling it up, and store it.


IMO pretty much a foolproof way to control it.

 

pretty cool gadget, but i only care about AFR control.. it was neat seeing how regular 93oct effected the ethanol content though as he filled it up. few tweaks to the IPW will fire a evo up first crank also dead cold on e85.

I love how that supra sounded though.. just a shame how bad he spun 2nd gear lol.. losing races due to traction isn't fun.

 

Don't know enough about the ProEFI, but I'm pretty sure that it can read feedback from the flex fuel sensor and adjust AFR's accordingly.

ProEFI also has an optional traction control system too.


Traction loss can be amusing at times .

Though nothing beats the grip of AWD.

 

true, although not sure id want the traction issues of that supra in that video.. that was pretty brutal.. im guessing it was around 700-800whp?

 

I found a response from dave a long time ago on his forum high boost forum that answers your e70 to e85 question:

 

Dave would know the answer to this question. Can AEM Series 2 make on the fly adjustments based on e85 fuel content?

 

If you have big swings in your area or fill up at different places you should definetly be testing your stuff. Zeitronix offers this lil' gadget:
http://www.zeitronix.com/Products/ECA/ECA.htm
It's about $500 for the whole setup but that's alot less than an engine rebuild.

 

i saw that, but where would you mount the sensor?

edit, nevermind. i see it goes in the return line, not in the tank.

 

Dave was this Josh Chee's car?

 

I see you talking about that on FB, how long does it take for a batch to process from start to finish?

We are lucky enough to have a station close by thats E95 from the pump.