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Old 10-16-2018, 01:59 PM   #6461
Diggs24
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Originally Posted by CHHA View Post
What is the "overboost" function aka AutoShiftRed?


@bubbadubba: Is it a A3 with 2.0 t 220 hp or is it the S3 with 300 hp? Your ECU PSI especially the boost spike from 4000-5000 rpm is crazy.
It limits boost at the shift. JB4 tends to overshoot target.
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Old 10-16-2018, 02:32 PM   #6462
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Quote:
Originally Posted by CHHA View Post
What is the "overboost" function aka AutoShiftRed?


@bubbadubba: Is it a A3 with 2.0 t 220 hp or is it the S3 with 300 hp? Your ECU PSI especially the boost spike from 4000-5000 rpm is crazy.



It reduces boost at 3rd-4th, 4th-5th, and 5th-6th shift points to help prevent over boost with automatic transmissions. Someone more knowledgeable may be able to provide more detail.


I have the 220hp, is20 turbo. CHHA, how do you mean crazy? I thought 22-23 psi was well within the range of the is20. I don't think it stays there very long.
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Old Yesterday, 04:25 AM   #6463
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Originally Posted by Diggs24 View Post
Very odd. Has the firmware been updated since you bought it from me? Does it do this high trims and high timing advance way too early in the rpm often?


Right now itís running 60/5//5 so Iím not sure it has been updated. I have newer firmware downloaded just need to flash the JB4. This is the first time Iíve seen the timing advance so early and the trims get high. Previously when I lived in SoCal I ran ~E25-E30 (91 mix) and FOL 60 and my all my logs were solid, see the example below:

https://datazap.me/u/dood/6-16-18map...18-25-26-27-28

I wonder if the lower ambient temps are a factor. I know lower IAT means more timing. Ultimately before I romp on it more Iím going to update the firmware and get another log but on Map 1 this time.


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Old Yesterday, 04:35 AM   #6464
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The stock tune doesn't advance before 4700/4800ish. I've had an odd log before where timing went weird, but car drove fine. Update the firmware and see if it continues.
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Old Yesterday, 05:32 AM   #6465
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Originally Posted by bubbadubba View Post
I have the 220hp, is20 turbo. CHHA, how do you mean crazy? I thought 22-23 psi was well within the range of the is20. I don't think it stays there very long.
I never saw a log from a is20 which ECU requests 18.5 psi at around 4500 rpm.

For example my ECU requests at nearly equal IAT's about 13-14 psi.

I see mine making 18.5 psi (and a little above) at 3-3500 rpm. It is not unusual to have this amount of boost in the rpm range of 3000-3500 but at much higher IAT / ampiant temps... Seems like Audi has a different software?
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