AEM Ultimate Resource Thread>>>>

[HumanVr4]

Originally Posted by slava

Not to be harsh but you need to read more about EMS. I suggest to read AeM Basic EFI , load software on the laptop and play with the interface until you think you understand 20%.
I have a map for 97 with 660 to get you started.
Send me IM.

i have not got it yet in the mail. i am just trying to get everything together that i think i will need. i dont know your im address

[mehlosTT]

Originally Posted by HumanVr4

i have not got it yet in the mail. i am just trying to get everything together that i think i will need. i dont know your im address

An ounce of prevention_
Every workmap will be different enough for the same model as far as critical options...so one must start with nayone's workmap and first set the basic calibrations; such as Timing Wizard and TPS wizard...but_ before that, it is so imperative that one checks and sets each sensor being used on the particular vehicle and do the same for setting up the Load and RPM ranges to be used.
Under the menu Sensors/Setup ( starting with the basic 1311 workmap installed, you highlight the correct sensors being used and then hit enter...when it is done right, there will be a Green check mark in the box. Starting a 1311 workmap without being able to know which Option does what, is like trying to fly a plane with only car driving experience...you will get it down the runway straight but after that, well_good luck_
Read the AEM manual at least twice, no matter what your experience is with EFI tuning, there is much to know which is particular to AEM's ems. After three years running the AEM ems in a daily driver no less for most of that time, I still find things I hadn't known well; such as particular relationships between certain Options and Tables affecting each other at certain conditions...all which are more important when tuning her for better then stock drivability then just WOT at the track.
As the old phrase goes, " TIMING is_ everything."

[Bmill]

Update on No tach situation:
I realized this has been discussed many times w/ only one solution found which was the jumper mod. My box already had the jumpers in place. So I called AEM and had a RMA for a hardware update (i have one of the earlier boxes). Shipped it in. A couple days later a AEM tech called me saying the update was complete but said the EMS had nothing to do w/ our tach (partially true). Well I agree w/ him and they shipped it overnite back to me. Plugged it in this afternoon and I HAVE A TACH!!!! I cant tell you how happy I am after no tach for about a year now. Also my experiece w/ aem was awesome, guys were great and did all the work for free (minus me shipping it to them). It was a week turnaround after they recieved it. Now to get this thing a better tune...

[Heikki]

Has anyone experimented with Accel/Decel fueling?

There are load and throttle based settings for Accel fuel, and throttle based settings for Decel fuel. Currently I am using only throttle based settings, all load based accel tables are set to zero.

The problem I am having is that the AFR dips into 10.xx when I stomp on the gas, and when I lift to change gears. Sometimes fuel ignites & explodes inside the exhaust when I stomp on the gas, causing small children to run for cover and elderly reach for their nitros. Not cool.

I'd like to know how to lean out the AFR when going to WOT & lift to shift, what the optimum settings would be and how to get rid of that annoying banging?

Heikki

[HumanVr4]

i have a 1997 vr4. i know i will get a cel, if i do the egr block off. but will i still get a cell when i go aem ems?

[mjannusch]

Originally Posted by HumanVr4

i have a 1997 vr4. i know i will get a cel, if i do the egr block off. but will i still get a cell when i go aem ems?

Nope..... Not unless you want the EMS to turn it on under some condition.

[mjannusch]

Originally Posted by Heikki

I'd like to know how to lean out the AFR when going to WOT & lift to shift, what the optimum settings would be and how to get rid of that annoying banging?

I'd take a look at the Decel Fuel Cutoff settings...

Fuel -> Deceleration Fuel -> Options.

I've got mine set:

Fuel off above rpm: 1500 rpm
Fuel off below load: -10.94 PSIg
Fuel off below TPS: 1.95%
Fuel off coolant min: 127 F

Seems to work decently well. Basically anytime the rpms are over 1500 rpm, load is at -10.94 psi, and the throttle is closed and car warmed up it will completely close the injectors until you add more throttle or rpms drop below 1500 rpm where fuel will come back on to make it idle.

That should solve the popping/banging problem on deceleration. There are other ways to do it, but this way is pretty simple and easy to tweak to your needs.

[Heikki]

You are talking about fuel cutoff at low rpm decel and vacuum to save gas, and I have those parameters set similar to yours. What I meant is the very rich condition when you take your foot off the gas pedal to change gears at redline, bang the gear in, and stomp on gas.

I played with the accel and decel settings and I got it much better now. With the below settings I get neither rich dip nor hesitation.

Accel dTPS Trigger: 5
Accel Limit: 41%
Accel Pump Sustain: 3.91%
Accel TP Sensitivity: 75%

My Throttle Accel Modifer ramps down from 50% to 0% as oppose from 100%. My Engine Speed TPS Accel Factor ramps down from 60% to 0% at redline.

Heikki

[Telefonica]

I've got a quick newb question. I'm thinking about getting an ems but am wondering if I also need a logger. I know the ems has an internal one and can also be logged on a pc throught the serial (which I hear is painfully slow), but I'm thinking that it would be nice to see knock displayed in real time. Maybe I'll get the serial gauge or something. Also, is anyone using their ems to control propane/water/meth injection? If you are could you tell me which kit you have or if it's ghetto, just a simple list of parts.

[Heikki]

Originally Posted by Telefonica

I've got a quick newb question. I'm thinking about getting an ems but am wondering if I also need a logger. I know the ems has an internal one and can also be logged on a pc throught the serial (which I hear is painfully slow), but I'm thinking that it would be nice to see knock displayed in real time. Maybe I'll get the serial gauge or something. Also, is anyone using their ems to control propane/water/meth injection? If you are could you tell me which kit you have or if it's ghetto, just a simple list of parts.

The internal logger is what you should use for knock monitoring. Even though you could configure the AEM to trigger e.g. check engine light when knock occurs, the knock events happen so fast that I doubt this would be any help to you. A single spike propably would surely go unnoticed.

The PC logging is actually usefull tool. I do not use it for knock monitoring, but it's great for fuel tuning.

I am not using propane or water/meth injection, but EMS can control one of these. Some people drive Shurflo pumps with PWM output and use nitrous maps to compensate for this. I dont' see why the same could not be done with propane solenoid. If you search AEM forums you'll find more info on this. As for what parts you'll need, net has ton of information on DIY alcohol injection.

Heikki