Listening for Det
#31
Its not quite as easy as that as the sensor will operate on a very narrow feq/noise band so you may not be able to sort on a stock ecu where you maybe able to adjust it on a programeble ecu,
Ion sensing looks interesting but we wont know what is realy like until it becomes wide spread.
Mark
Ion sensing looks interesting but we wont know what is realy like until it becomes wide spread.
Mark
#32
Mark
#33
Yes, and that's more or less what I intend to do. I'll reduce boost pressure to where the motor isn't making much power (don't want to break anything), and gradually induce it somewhere in the meat of the torque curve and 'get my ears tuned' that way.
#34
I would love to hear DB's .02 on this subject. Most of his high hp street cars are 2.3L and they all make lots of hp. I'm not sure how much timing he runs with his strokers but it would be interesting to hear how he adjusts the knock on the AEM. I do know that his torque curves are flatter than any others that I have seen.
#35
Im really interested as well. To finding a fix ( in other words having the knock readings being accurate to take full advantage of an AEM EMS with the knock control options.) So even if a car is tuned with head phones (lets say for a glory run) when conditions change or bad gas everything will still be controlled ( as much as possible to save the engine. Especially when in the 500-700 hp range)
The ion sensing is interesting but i would guess it would be rather expensive right now until its more widely used and eventually become cheaper and/or implemented into factory cars.
The ion sensing is interesting but i would guess it would be rather expensive right now until its more widely used and eventually become cheaper and/or implemented into factory cars.
#37
Maybe part of a Delphi system could be adapted...you'd have to post-process the ion current supplied by the coil module to detect the knock and feed that information to the ECU in the form it's looking for. Maybe by simulating the frequencies that the knock algorithm is looking for so that it starts pulling timing.
Hmmmmm...
#38
No, I am beginning the arduous process of piecing together and installing a new engine, clutch, and gearbox, so it will be a little while until I get into the tuning phase. I will report back however when I do. I'm looking forward to it.
#39
If one were to retrofit ion-sensing hardware to the Evo, a Saab would be a fine place to start since they've had by far the most experience with it.
Saab was the first to apply ion sensing knock detection to roadgoing vehicles. Introduced it in the early '90s.
Saab was the first to apply ion sensing knock detection to roadgoing vehicles. Introduced it in the early '90s.
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crcain
Evo Engine / Turbo / Drivetrain
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May 9, 2008 09:52 AM