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> MazdaSpeed 3/6 - ECU Computer Tuning

MazdaSpeed 3/6 - ECU Computer Tuning Have an ECU tuning issue? Do you want to discuss Mazdaspeed 3/6 tuning solutions? Up to date info on the latest! Piasini Reflash, Cobb Access Port, Xede, Procede, Standback, Superchips & others supported here!


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 Old 12-26-2008, 11:40 AM   #1
 
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Default ecu learning trick?, will this work?

got this from Re-Mapped ECU Learning Trick 10-20hp in 5 seconds - NASIOC
Its for Subaru's not sure if its the same learning method our ECU does.



Just a little trick that has been shown to accelerate the factory ECU's ignition timing learning process.

Background: There is something called "Ignition Advance Multiplier". It represents, by some complicated algorithm, the average learned positive knock correction applied to the ignition maps. It's represented in 1/8th degrees increments. 1 being the lowest and 16 being the highest (1/8 to 2 degrees in absolute terms).

The "happier" (knock free) the car is, the higher the number will be. Conversely, the lower it is, the more knock prone it is. This number, after ECU reset ore ECU swap defaults to 8 and usually creeps up to 16 (if well mapped) through normal driving. Depending on driving characteristics, this can happen within a few hours or a few weeks. Well, here's a way to make it happen in about 5 seconds ....

First: With the car fully warmed up, reset the ECU. This can be done by killing power the ECU or by simply pulling off the neg. battery terminal and pressing the brake pedal for a couple of seconds.

Second: Drive to a nice open road without traffic. Don't go on boost until you get there. Put the car into gear (3rd gear works the best) bring the revs up to 2600rpm. Push the go pedal down slightly so boost stays right around 2-4psi. You will need to MAINTAIN 2500rpm and 2-5psi for approx 5 seconds. You can do this by left-foot braking gently as to prevent acceleration. During these few seconds, the advance multiplier (which you can't see so you'll have to trust me) will go from 8, to 12 and then to 16. Works like a charm. And on our reflashed ECU, is worth an immediate 10-20 horsepower

In an attempt to save a lot of dyno time between reflashes (when the advance multiplier resets itself), I do this little trick after every reflash. In a typical dyno session, it's not unusual to reflash the same car up to 5 times. On the dyno, all I need to do is tell the dyno to hold revs to 2600rpm. Then I just lay on the throttle until I see a few psi of boost... Bingo!

Warning: This little trick artificially speeds up the learning process. This is only a good thing if the re-mapped ECU is mapped properly. If there are trouble-spots where knock is present, this trick will make it even more present. So be careful!


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 Old 12-26-2008, 01:18 PM   #2
 
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video of this in action? Dynoes? I cant trust your hear say with the life of my car and i dont think anyone will until proven.

If there are trouble-spots where knock is present, this trick will make it even more present. So be careful!

whats that mean i think everyone on this forum has had knock at least once even a blip of .7 or w/e is still knock.
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 Old 12-26-2008, 02:39 PM   #3
 
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This reminds me of video game cheats back in the day...

For Example:
Stand three steps away from the tunnel. Press B and hold it for 20 seconds, then walk forward in the direction of the tree and a magical bunny will pop out and give you a star!

LMFAO I don't know if anyone will get what I'm talking about...
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 Old 12-27-2008, 05:39 AM   #4
 
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Im pretty sure this wont work on the MS3s ECU.
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 Old 12-30-2008, 04:56 AM   #5
 
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i've heard similar instructions for a lot of different cars. some times its to get the ecu to adjust for race gas (after reset, if the ecu doesn't see any knock, it'll keep advancing timing until it runs out of adjustment range or finds some knock)

i'd imagine our ecu's can be persuaded in a similar way, but then the odd throttle behavior at part throttle will probably be more pronounced
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 Old 12-31-2008, 08:34 PM   #6
 
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I think our ecu is wayyyy too smart for that. If it did work it would be temporary. This ecu seems to learn and adjust constantly.
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 Old 12-31-2008, 08:47 PM   #7
 
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u have a better chance of blowing up with all that partial throttle boost and shit. boom boom boom
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