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Old 04-26-2010, 06:14 PM   #1
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Default EAE - who uses it?

I'm switching from B&G code with TPS based accel enrichment to MS2extra with the fancy looking EAE available. Anyone here using it? Any tips for a starting point, or maybe even some awesome working settings??
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Old 04-26-2010, 06:23 PM   #2
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I started messing with it a little. it's awesome.

Basically you have two main tables: adhere-to-wall and sucked-from-walls.

The idea is you're compensating your accel and decel enrichments for the amount of fuel that sticks to the IM walls during injections and then gets sucked off with lift.

To start bring all your standard accel enrichments to 0.

Basically you want to get out on the highway so that throttle change doesn't really affect rpms a lot, then start slowly pressing and depressing the pedal to see how the default settings work for you.

When you push the throttle you'll adjust the adhere-to-walls until your AFRs go where you want them at different rates. Since it calculates for residual fuel the enrichments feel a LOT smoother than standard enrichments.

If it leans out too much on lift, try decreasing the amount of fuel being pulled from the walls. If less is pulled from the walls, it'll inject more to compensate.

I found that with EAE on, the AFRs no longer hover stupid rich before overrun kicks on (2sec delay) but the end result make the driving experience much smoother overall.
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Old 04-27-2010, 03:00 AM   #3
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What are your actual settings now with this?
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Old 04-27-2010, 09:31 AM   #4
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I will have to go look at my map, i didnt tune it much because it seemed to react well with the defaults on my MS-II. Next time I drive the car the MS-III will be back on, but I just remember needing to adjust the sucked-from-walls a bit because it would go lean on lift a little too fast.
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Old 04-27-2010, 11:07 PM   #5
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Often with EAE, the shapes of the curves relative to each other can have more of an impact than the actual values. EAE is one of the few things I recommend that you try in the car while datalogging, then go back to the bench and try to make it do what you think it should do on the bench (I use a syringe and vacuum line to do this) then put it back in the car and tweak a bit as necessary.

That said, I use it in my rx7 and the corolla, and it really helped both, although it took a lot more tweaking in the rx7 to make it work right than it did in the corolla. The corolla is actually not fully tuned right now so I switch EAE on and off as I find spots in the VE table that are messed up. I'm also going to switch from blended alpha-n/speed density to ITB mode on that engine soon, so I'll be starting over soon on my tune.

Ken
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Old 04-27-2010, 11:14 PM   #6
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i tried x-tau briefly with the B+G code, but found it to be a nightmare to figure out and stuck to TPS based instead

if the defaults are a decent enough starting point, maybe i can get it working
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Old 04-28-2010, 12:48 PM   #7
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When was the last time you tried X-Tau with B&G... which firmware?

I ported X-tau to ms3 as an option for those upgrading from B&G code, and found that it wasn't that difficult to tune... about the same as EAE really.

Older versions were a nightmare though, which is why I wrote EAE in the first place.

They both use very similar math and algorithms, and the tuning curves are really the only major difference.

Ken
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Old 04-28-2010, 02:22 PM   #8
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I think it was a pretty early version, possibly even a beta version? It would have been summer of 2007. The guy who built my megasquirt loved testing experimental stuff, and he practically insisted that I try it out lol.

Sadly I couldnt figure it out, so to his dismay I got TPSdot working and have been using that ever since (despite a couple of B&G firmware updates). I was a complete n00b back then also, so I'm sure that was a major factor too .
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Old 04-28-2010, 04:15 PM   #9
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That was likely back when we released ms2/extra 1.0, which was the first release that had EAE. If that's the case, B&G had not yet made the X-tau code's tuning parameters easier to deal with. They are much easier to deal with now.. I'd say tuning EAE and X-tau is about the same difficulty wise. For most people it's still not "easy" but it's a lot easier than it was.

I have a few ideas to make EAE even easier to get a good tune with that I will probably try on my own engines somewhat soon.

I'm actually wearing a T-shirt right now that someone had made after the 2006 Megameet:

Front:

MEGASQUIRT

Now with X-tau...

Back:

So advanced not even we can tune it!

That's why I wrote EAE.

Ken
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