And does anyone make it? Be nice to run 85 when I find it.

 

You could easily get an E85 tune, just need a fuel system that keeps pace... But true FlexFuel (auto compensating tables for ethanol content), more than like you're going to need a standalone EMS. AFAIK, the US-based cars (GM/Ford) and GTR really the only "power platforms" that can do FlexFuel on the OEM ECU.

 

Damn. would be nice to just put in whatever and have it automatically adjust. my c5 can't do it, or the 911. ****.

 

It could, ProEFI, Syveccs, and AEM ECU an all support it. You don't have to have a heavily modified car to run them. The parts for the sensor are about $100 or so. Can probably run a AEM or ProEFI in the C5 too!

 

proefi has a z06 shop car 1000 rwhp on corn

 

Yeeees, twin 66mm turbo, upgraded torque tube, built motor, built trans. $65K obo! Without traction control it's near undrivable

 

Having to change the entire ecu isn't worth it. Not sure I want too know what that costs. Few buddy's use the holly efi system. About 4k

 

the biggest problem with oem computers doing e85 is they can't adapt as well to lesser grades of fuel. if you have an e85 file and load up e70 you could be running a dangerous file due to the advanced timing. add in the need to adapt and also running the tank uber low to get a full load of e85 its just not worth it. if you have a station that has good fuel you limit yourself to that station.

call garth at undercover. I'm sure he can set you up with a proefi 112 that will meet your needs for a decent price

 

The 112 is still in BETA, get a 128 for now... Ask me how I know

 

Undercover sold few sets over the holiday

 

It doesn't seem like the stock computer will be able to switch on its own between fuels.
Is it possible to have an e85 tune programmed into a cobb v3 and switch tunes when you switch fuel?

 

thats the easy part. what you x=can't control is the quality of the fuel. i have seen pumps read e85 and the fuel was e50. i have ran c85 race fuel and the best it read was e77. the factory computer can't adapt for those large swings. also you need to have the computer adapt for each fuel ran when filled. if you have 1/4 tank 93 and add e85 your diluting the e85 and still the file will be for e85 with huge amounts of timing.
what you are left with is only using a fueling station that you have measured the fuel and know what your getting or draining your tank and running e85 for racing alone. not the easiest way to run flex fuel

 

To build on this the ethanol content varies station to station, and even season to season. A flex-fuel sensor with a supporting ecu takes all the guess work and switching files out of the equation

 

alright, I was just thinking outside the box, the simple answer is no unless you have a constant source of consistent ethanol.
Going back in the box now...

 

For the EMS itself you aren't talking tons more than what your buddies are running with the Holley. HOWEVER, this is an expensive motor and I think it's worth the money to have someone experienced install it and give it an initial tune. Garth and some others have this down pat and Garth will be the one setting up and installing my system - I purchased ProEFI from him. The E85 sensor isn't super expensive either. When you begin adding on things like intercoolers, intakes, and other toys it begins to add up.

Price out what an ECU flash costs and then figure on potentially needing it flashed a few more times as you mod the car. Compute the value of having safeties the factory EMS doesn't and a traction control that's geared for straight line acceleration vs being a nanny and saving your *** - know that the save your *** nanny is still available if you want it. Also, when you turn it off with a stock ECU my understanding is that it can turn itself back on - not so with a ProEFI or other standalone. Factor in an accurate gas gauge, what should be accurate MPG readings, the ability to tweak the speedo to read correctly for different tire combos, the ability to run doodads like methanol injection, staged nitrous, shift and warning lights, and whatever else you can dream up with the available I/O and you can begin to see the value - be it Corvette or 996. Oh and flex fuel - you can switch up fuels however you want and the ECU interpolates for the available octane. This can mean a great big HP bump if you're octane limited - and most of us are. I SO want to get a flex fuel emblem for the *** end of my car and start using those special fuel spaces at work! Anyway, you get the idea - it's not as bad a value proposition as you might think if you intend to mod the car very much, I look at it as an investment.

As for the 112, ITGuy is the only one I know of that has one unless 32Krazy has one? I know it's their newest box but it's undergoing some development and has apparently got a few teething issues. ITguy can elaborate on that. Either box is capable, I believe the 128 has more I/O which is very valuable to me. Syveccs and AEM are also BOTH very capable boxes and I expect we'll be seeing some cars running AEM here pretty soon.