Stock O2's only read down to 11.25... closed loop fueling is NOT possible I would have to assume.

E85 stoich .................. 9.765
E85 max power rich ...... 6.975
E85 max power lean ..... 8.4687

My AEM UEGO doesn't go under 10:1, and even a dynojet doesn't go under 9:1 (at least from my experience??) so how do you guys even do a power tune and/or monitor your A:F with any EMS?

 

stoic doesnt matter. lambda is lambda.

e85 tunes to the same AFR as gas. 13:1 cruise, 12:1 under load.

when you put E85 in, it will just run super lean, so you just keep adding fuel til your wideband says 13:1.

 

jesus, ive got alot to learn.
fml.

 

Damn I guess I have some more homework to do LOL thanks for the nudge.

 

str8dum is correct, when you tune for e85 you will tune it just like you would gasoline. i have done this w/ aem ugo on mr2/240sx.. enjoy the added benefit, its fun.

 

I wish we had more E85 Stations around here....If we did i would do alot more E85 stuff

 

discovered one right down the street just prior to stopping a soccer mom from filling her '99 accord with it...and there's a few others around somewhere too. Looking forward to messing around with it.

 

there is/was only one in annapolis we would drive 10-15 miles out of our way to go to. It was worth it .. trust me.

 

It is the Shell on Bestgate which is only a few mi. from where I live. It's still there.

 

Probably the wrong place to ask but figured i'd give it a shot before I start a new thread:

Is there headroom on the stock injectors for E85 on an N/A basis? Real reason is nitrous use, but I don't know if they have the needed extra capacity.

 

since extra fuel is coming from a solenoid for nitrous, i'd say that the stock injectors have enough pulse width for E85. You'd want a bigger fuel pump though for when you are spraying.

 

What I mean is can you run an otherwise stock HR on E85? Ignore the fact that there is a nitrous kit, because when it adds fuel it's also adding air. Could you re-tune for E85 on a basically stock N/A Z? If so, I could safely run a lot more timing and not have to worry about retarding it when spraying.

Stock pump usually gets far enough for the power i'm looking to put down. Although I wouldn't mind if all I had to change was a pump, I'm thinking i'd need bigger injectors before I need a bigger fuel pump.

 

You'd be running at 90+% idc at best assuming you don't run out of fuel. Easy way to tell is log your IDC %... if you're under 60% at WOT you MIGHT be OK on E85 because remember you'll be adding around 30% more fuel. Keep in mind running high IDC's aren't good for the injectors, so ideally you SHOULD get bigger injectors.

 

Yeah, I just hate being the one to do the first experimentation. I did that a lot on my last platform, but this is a much larger community so I hoped someone had been there before. I'll log my PW with the Cobb and see what I come up with. I believe I wasn't getting more than 13.4ish at max, but at 8k that doesn't leave much room.

 

djamps is correct, that would be the only way to be sure. personally i never liked running more than 80% for safety reasons, however i have seen multiple cars run close to 100% for long periods of time without fail and a lot of finger crossing.

to be on the safe side if you ever plan on upgrading in the future you might as well do injectors and a pump now.. for peace of mind.

 

Gotta look at my logs, looks like 16ms is 100% idc at 7500rpms... don't think I have enough.

 

Looked at my logs... 15-16ms on stock everything. No E85 for me lol.

 

I also wondered the benefits if any of running E85. If it was a huge benefit i would upgrade my stock injectors

 

It's like cheap race gas, 105 or so octane... with a E85 dyno tune you could theoretically run more timing and get more power before the engine pings. Other than that the benefits are not many... MPG's will be ~30% less and the price isn't much cheaper than 93 octane.

 

yea a few years ago i could get e85 for less than regular gas. then it was def. worth it. now however i would only run it on a weekend warrior/track style car. I was usually able to tune it to about 20% less efficient on fuel, on a turbo vehicle i was normally able to get about 10-15% more power by adding a few more psi and either keeping the timing or adding some depending on the boost level etc..

as far as our cars and NA is concerned it would probably not be worth it..