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I mean if you know what car its from you can narrow down the list of potential OS's significantly, if you have a hex editor, you could take an unscrambled file and see where the OS name is stored. ...

Yep, 32087, 7365, 7328,and 7336 are all the same as their gasoline counterparts. I could potentially command slightly higher pressure at lower RPMs, to help with atomization and ignition. ...

There is definitely something up though, a 40 minute highway drive yielded nearly 1500 logged misfires on full strength pump e85, that same trip with an e20 blend in the tank yielded only 100.
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You know what's funny is that mine also stopped at 11:1 or 60%, which I found odd because the pump ethanol near me is typically 75-80% in the summer its usually close to 85%. My fuel trims were good...

Yes the code that kept coming back was misfires in the first 1000 revolutions. There was a cylinder 2 misfire code but that only showed one time. What does that indicate? I was guessing spark plugs,...

Hey everyone,

I've been playing with some ethanol on a very basic flex tune I made. Nothing wild, just enabled flex and then upped the base timing. It was running great, on the first fill, and the...

In addition:

They tested a few different mixtures and found some interesting results. Namely that there is not a lot of difference between a 25%/75% methanol to water mixture and a 50%/50%...

I actually found a nice paper that talks about this in great detail from 2020, you're right there is much more to this than just charge cooling. They found that injecting water is only effective at...

Yeah I'll see how it goes. My theory is that I don't think the primary action is charge cooling, I think WMI's main advantage is absorbing heat form the combustion directly. However that's just a...

Which tables? You mean 45031 and 45032?

Nitrous would be fun...and this setup is easily converted if needed

Is it a waste because there are better options? Or is it a waste because it doesn't work? Not trying to come off as confrontational, I'm genuinely trying to collect more knowledge on this.

The...

No worries I understood what you meant :) I view this as a technical discussion so I don't take anything personally here.

I'll post an update when I have an answer, I'd like to verify it on a dyno...

Yes you are correct, I guess I shouldn't have said "rich" or "lean" but rather smaller or larger stoichiometric ratio.


I guess we can assume that the combustion efficiency is constant and the...

Oh this is very interesting, now I understand. Even though gasoline has a higher energy density, it is nerfed by its relatively lean stoichiometric point. Alcohol has a much lower energy density...

hmmm
Its not looking good for this right now, but I'm in too deep. We'll see!

What has your experience been? I know you've tuned a lot of cars, I'm curious how it worked out in real life. I find a lot of kits for NA cars for sale, and a lot of people saying they've done it NA...

This is unfortunate, because at the end of the day I still can't get ethanol. Not enough stations in my state, nowhere to store a large drum, and too long of a commute to use regularly.

However...

Thanks mike!

Not to hijack this thread too much but would you be willing to give a bit more detail on what you'd change about the EVC schedule? Or just more bluntly how you'd tune this? Still learning and...

whats the catch? did you develop the crack yourself or are you using software you found/bought?

Is there any need to change anything in the torque model at all? It seems like since the mapping covers all the way to MBT and 1.1 load, if you don't go beyond either of those two things, the stock...

Ok so these replies have been very insightful, I've added some torque parameters to my log and pulled some to see if I can work it out. From your explanation the three torques are:

Scheduled -...

This may sound dumb but why not seal off the throttle boss with tape or something, fill the manifold with water and then measure the water.


Should work if you can get the air out of the runners,...

And the only way to do that is with a dyno, correct?

So if I'm understanding this right:

As long as we don't add any additional air the torque model relationship still holds. The actual output torque of the engine may be different from what the...