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Old 06-03-2005, 07:31 PM   #1
darksands
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Default High Det map and Low Det map

The StreetTUNER has access to change the low det map but the ProTUNER has access to the High Det map... Someone please explain the high det map please. Help me expand my knowledge. Thanks in advance

Peter
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Old 06-03-2005, 08:45 PM   #2
stimpy
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The IAM decreases under knock events and once it sees enough knock, it switches to a high detonation situation. For the WRX, it is an ignition advance multiplier of 4.
-Jon
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Old 06-03-2005, 09:07 PM   #3
mcowger
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wow, you have to have a ****ty tune or ****ty gas to get that far down.
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Old 06-03-2005, 09:16 PM   #4
darksands
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just curious what the high det map does... im not getting into there... oh... I got ****ty gas part. Cali 91 octane piss gas. And we need adatives to get it to 91!
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Old 06-03-2005, 09:22 PM   #5
mcowger
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Meh....I have Cali 91 oct too, but my IAM sticks around 12-13 without additives. Its crappy, but not THAT crappy .
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Old 06-03-2005, 10:01 PM   #6
Jon [in CT]
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Quote:
Originally Posted by stimpy
The IAM decreases under knock events and once it sees enough knock, it switches to a high detonation situation. For the WRX, it is an ignition advance multiplier of 4.
-Jon
In addition, it's my opinion that the ECU will unilaterally set the IAM to 4 when it goes into limp mode to force systems that look at IAM to respond accordingly.
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Old 06-03-2005, 11:54 PM   #7
hondaeater69
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Quote:
Originally Posted by stimpy
The IAM decreases under knock events and once it sees enough knock, it switches to a high detonation situation. For the WRX, it is an ignition advance multiplier of 4.
-Jon
That explains what it does to the IAM under high knock, but what about the high det map? Isn't the high det map a FUEL map? I would imagine a richer map. . .
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Old 06-04-2005, 01:04 AM   #8
stimpy
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Jon [in CT] - Could always disconnect the MAF sensor. That, I believe, puts it into limp mode.

Sorry, I guess I kind of forgot to respond to the rest of the question. The high detonation situation is, from what I've seen (which isn't that much), a fuel map change. There are multiple high detonation fuel maps. Typeically marginally richer than the low detonation fuel maps. One-third to one-half point richer in the knock prone areas such as peak torque. Some I've looked at and thought, "Why even bother switching".

We tuned my car on the dyno when it was raining so we had that all tuned properly. Since my car was so out of whack, one it warmed up and the car hit lower loads, it went into areas that weren't properly tuned. 12:1 AFR at peak torque for a couple street runs put it to 4. I saw something going wrong but I didn't have my ZT-2 in place so I didn't put 2 and 2 together until I got that running.

-Jon
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