WBO2 Ethanol question

[Shizuma]

Soooo I want to run e85 this go around and was thinking about how this would affect logging with my AEM UEGO. Since the gauge is just converting lambda values to "stoic" fuel values (ie: a 1 lambda is converted to a 14.7 reading on the gauge) a lambda value of 1 for e85 (9:1) would still be converted to 14.7 correct? So for the purposes of logging O2 voltage and correcting my maps I should just be able to tune for a "stoic" value of 14.7 right? Or am I oversimplifying things?

[Magusownz]

Correct sir!

[Shizuma]

Snazzy, I'm going to have to do a return line setup (not too bad) but I'm looking forward to running e85. I've seen some good results from it, so we'll see how it goes.

[kortik]

so what needs to be changed to run E85

[Magusownz]

Snazzy, I'm going to have to do a return line setup (not too bad) but I'm looking forward to running e85. I've seen some good results from it, so we'll see how it goes.

Can't wait to see your results! Should be some real nice gains. PM sent your way also.

so what needs to be changed to run E85

Just need to have enough fueling to support it and the tune. On our cars.

[Shizuma]

so what needs to be changed to run E85

Basically what he said. E85 is a higher octane and as I said above it's stoic value is "lower" than gasoline so you have to inject a physically larger amount of it to get a stoic mixture. However, it has good knock suppression and cooling abilities and it generally burns cleaner which is nice. The only thing you'd really have to do to run it on a Celica is make sure you have adequate head room to supply the larger amount of fuel you need to inject as well as maintain good fuel pressure.

The only other thing I'd be concerned about (and I'm still looking into this) is how ethanol reacts with aluminum. Apparently there have been instances of it reacting corrosively with Al fuel cells, though I suspect if you ran proper hard anodized fittings and the appropriate hose this shouldn't be a problem. The only place where this may get tricky is if you're running an Al fuel rail, but then again you could just hard anodize it or run a steel or composite rail.

[kortik]

Ok so far I have walbro 255
Mwr fpr kit+ mwr fuel rail and gt2860rs turbo w/ 700 cc injectors
Is that enough for fueling properly to run e85 on a 2zz?

[Shizuma]

^ Maybe, couldn't tell you without seeing what your duty cycles look like, but you could probably pull it off.

[kortik]

well currently they are at 70% at 10psi and 12afr

[Shizuma]

well currently they are at 70% at 10psi and 12afr

Hmm, you may need a bit more injector. I say go ahead and try it if you want, just keep on eye on your duty cycles and fuel pressure drop symptoms. Also make sure you get AS MUCH of the gas as you can out of the tank before you fill up with e85 and vice versa.

[Magusownz]

Hmm, you may need a bit more injector. I say go ahead and try it if you want, just keep on eye on your duty cycles and fuel pressure drop symptoms. Also make sure you get AS MUCH of the gas as you can out of the tank before you fill up with e85 and vice versa.

Exactly what he said. But with a 70% duty cycle you will most likely have to upgrade injectors. My 440cc injectors were at 70% and after were near 95% and rising so I've upgraded to 650cc.

[kortik]

I'll have to check on my duty cycle % next time I do a run to make sure if its at 70% maybe I am wrong

[Shizuma]

Just looked again and your running 700cc's at a 70% duty cycle? You may want to look again or see exactly where you're getting that # for the duty cycle...