VitViper - is there a provision to run ethanol-content sensor like my GM truck has and incorporate its output to create a "flexible" table?

Ecutek has recently released "flex fuel" and Fast Intentions is working on putting together a kit for it.

It's just a couple EFI fittings you can get on Summit, then the Zeitronix digital to analog convertor and a content sensor. Really simple. If I get bored I'll build a parts list of the correct fittings to buy.

Yes, ECUTek.

ECUTek didn't release "flex fuel" per-say. Their software allows for custom maps to be written, and the tuner is able to use those custom maps to add Flex Fuel support into the ECU.

Just to throw my $2 in here and my experience. I decided to put in a blend of ethanol. I'm on a stock tune and i used an online calculator to figure my octane numbers.

2 gal ethanol = 105 Oct
17 gal e10-91 = 91 Oct
19 gal blend = 93 Oct

Now i don't have dyno numbers but i definitely can say that there is more torque. The engine runs smother, sounds smother and my incline 1st gear start is less jumpy.

I used torque app to watch my AFR before and after and i would say the car leaned out about .50. Knowing the factory tune is rich, i figured a little leaning with ethanol would work out well. So far my mileage hasn't lowered.

I lost power:(. Best description...Higher octane fuel is slower burning. If your not igniting it soon enough then u arent giving the fuel enough time to release its energy. What u need to take away from this is that your ecu/tuning system is inadequate for use with e85 on your application. Whatever u take from this dont fall into the "e85 doesnt work crowd" because ud be egregiously wrong. Unfortunately your setup just isn't working with e85. No one has ever made anything but less power with e85 on the same timing as gas. Thats just how it works. Our platforms tuning software suppliers need to step it up imho.


So if thats correct im not sure why you got more with fuel trimming only. Clearly i need ecutek! Turner can only run 28* same as gas.

so with uprev and e85 you lost power?

Thanks for posting the info. I think this confirms that I will not be going forward with E85 when I switch to ECUtek.

Appears so. Cant get the timing.


But as the OP stated timings better with ecutek. Its worth a look see.

I used GTR's.

What timing are you running? My tuner cant get over 28 on any of the cars. He can tell it to but it wont. Im stuck at 28 on both 93 and e85. E85 lost me around 15hp. It just cant burn the mix soon enough. Is this what you're seeing or talking about with uprev?

hmm would be nice if someone had ecutek and tried this

I was basing that off the OP. 10hp doesn't seem worth the extra money and hassle of installing extra items as well as introducing a new point of failure into the drivetrain system.

If I were boosted, my answer would be different.

Lol like the OP?



Nothings extra though. OEM GTR injectors could fail just as easy as OEM 370's. And a tunes a tune.

I would have to buy injectors, preferably a flex fuel sensor, something to monitor the ethanol content and a new fuel pump.

+ECUTek

....Not for 10hp.

The real benefit when making the switch to E85 or flex fuel is the safety margin that is provided against detonation. Chasing NA numbers is difficult in itself, but reliability/safety becomes an issue when climbing higher and higher up that ladder. Same thing for turbo and supercharged applications.

Flex fuel is one of the great things that our government developed and released to the public. Too bad not many companies (especially the outer lying stations) took the opportunity...........

O yeah not me haha. $200 injectors and call it a day. And i spent $10 on a test tube to measure the content.