ECU Chip actually works??
#16
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Originally Posted by GreenPsycho
why does it look like a usb hub? isn't that kinda........ya know..........weird?
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#19
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if he was measuring at the same rpm, then somthing is goofy, but if it was at redline/fuel cut, then it might have raised rev limiter. however, i dont trust ANYTHING that is $50 and plays with my electronics
#20
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Well, I'm not sure about how you're measuring your gains, like they said a dyno is the best way, but since you hook it up to the MAS and it isn't brand specific, there are only two things it can be doing. The first is changing the intake air temperature (IAT) signal to a lower temperature, which cause the ECU to dump in more fuel and possibly adjust timing. The other is it could be messing with the barometric pressure signal, which would cause the ECU to mess with timing. In either case, since it is not tuned specifically to the car any gains are an amazing coincidence. Hope this helps.
#21
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Well, if it alters your MAF reading, then leaning it out would result in a lower MAF reading.. Leaning it out would result in slightly more power (whether its dangerous or not is really the issue) but I know that leaning the MAF curve will result in raising your RPM slightly (since the Mitsubishi ECU's limit things using fuel cut through the MAF reading)
#23
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but raising the the revs should only happen at idle... there is no way he can be running different speeds at the same rpms... that is totally dependent on the tranny... no matter how much power is put out from a stock lancer to a stage 2 boosted lancer... the rpm to mph will be =
#24
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I don't thinkanyone's arguing that his measure of gains is messed up. At this point we are discussing what his magic eBay box is doing. Unless it was designed specifically for mitsu it doesn't chnge the airflow signal. This is because we use completely different MAF sensors from what anyone else has. That means the only thing it can do is modify the iat or maybe the barometric pressure. Whether it leans or richens depends on what the guy who made it designed it to do.
#25
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Originally Posted by 03RallyLancer
but raising the the revs should only happen at idle... there is no way he can be running different speeds at the same rpms... that is totally dependent on the tranny... no matter how much power is put out from a stock lancer to a stage 2 boosted lancer... the rpm to mph will be =
His measuring isn't very useful, but it does indicate that it probably altered the signals to the MAF for that reason... which means the car is running quite a bit leaner than stock. On an Normally aspirated car, It shouldn't be too much of a concern, but I'd seriously recommend removing that thing, it just looks like a very simple switch box that was gutted..
But if it altered the MAF signal significantly, it can explain the high idle, depending on which sensors that were tapped into.. but if you have the signal at idle 20hz instead of 30hz, the ECU may attempt to raise idle to hit that value (plus alter the fuel trims)
I have to be honest about this, this thing scares me, it looks like something someone made in their garage out of spare parts and I would have you strongly caution your friend and encourage him to take it out before he does damage.
#30
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Personally, I think if you want gains after any mods are installed(which will be minimal unless you go turbo) just get a tune, don't even bother with the promises of large hp and torque gains from those things. The way a motor works it's just not physically possible to see those kind of gains with just a chip. I don't do tuning but a few people I know said it's like a science, pretty much like a form of art almost.