AEM EMS Banter Thread

[mb3000]

Just a thread to compare tunes, etc...

Anyways, I was wondering what everyone's knock gain is set at. I've kept mine at the .421, but always wondered if y'all messed with it.

[niterydr]

Knock scaling should be adjusted during a safe run. Typical knock values will rise with rpm (raw voltage here) and peak somewhere, every car is different. I recommend setting up the threshold on a known safe tuning value and then keeping it on. I've seen some cars under 1V (such as my current one on E-85) and some cars are a quite louder (my old stealth).

[mb3000]

I know that, I'm talking about the knock gain value-

"Knock gain is a knock signal filter. It is used to further desensitize a knock sensor. If this value gets too high, the knock sensor will not respond to knock events because the values will be filtered out."

Was wondering if the guys with built engines added a little bit to this value to compensate for the forged internals.

[MR2]

Has anyone attempted to run the Ethanol Sensor with this ECU Yet and get some sort of Linear adjustment that allows switching between normal gas and E85 for example without having to fiddle or do anything?

[niterydr]

Has anyone attempted to run the Ethanol Sensor with this ECU Yet and get some sort of Linear adjustment that allows switching between normal gas and E85 for example without having to fiddle or do anything?

Ethanol sensor + controller + user defined fuel trim map = done. Of course you don't have the timing control unless you build a logic box of some sort to pull timing via nitrous maps at a certain ethanol percentage.... It is a WIP for me, we'll see if I complete the setup enough to want to make the car "flex fuel" this summer or push it to next year.

[MR2]

yeahhh well it's Timing + limiting maximum boost, but I assume all of that is fairly easy?

[mb3000]

Anyone ever had problems with hot starts. Not the starting of the engine, not the initial crank pulse, start extra, start extra decay or any of that.

My issue is that the car will start fine, once the start extra wears off the afr's shoot way lean (17:1 and leaner), idle will start pulsing, & the car wants to die. The issue only goes away after driving the car for a couple of minutes. Coolant temps stay the same, however the car will now idle at the proper afr.

[niterydr]

Check your fuel trims based on coolant temperature as well as the base settings. Do you have 02 feedback on? What is that trying to do?

[mb3000]

I cut the FB off after it went wacko one day. My warm up enrichment cuts out at 80C, my car runs around 82-85C normally.

To be honest, I think its some type of vac related problem, as the engine idles in different cells when it's started hot. I temporarily added some fuel to the cells, but I'm still looking for what would cause this.

[mb3000]

Made myself an EMS version of the stock timing map using Greg's posted high octane timing map.