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Author Topic: Safe water meth tuning  (Read 24252 times)
NOTORIOUS VR
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« Reply #15 on: August 28, 2013, 11:25:48 AM »

And that's the point... If CFs are showing up the engine is already retarding towards safe timing so you should not hear it.

IMO that depends on if the CF's are still increasing or not.  Just because you hear it ping at -6 CF and then you see -9 CF shortly after doesn't mean you might not hear it ping, it can/does happen.  This is common on overly aggressive tunes with little to no change in the timing maps.

But generally yes, at that point the timing retard should have pulled enough to stop knock.
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julex
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« Reply #16 on: August 28, 2013, 12:15:09 PM »

IMO that depends on if the CF's are still increasing or not.  Just because you hear it ping at -6 CF and then you see -9 CF shortly after doesn't mean you might not hear it ping, it can/does happen.  This is common on overly aggressive tunes with little to no change in the timing maps.

But generally yes, at that point the timing retard should have pulled enough to stop knock.

And we are talking about freshly flashed tune on its first WOT... before timing adaptation retards things semi-permanently.
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NOTORIOUS VR
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« Reply #17 on: August 28, 2013, 01:03:33 PM »

yes for newer flashed files where the ECU hasn't been able to fully set it's adaptation... since we're on the topic being in cars like that it's amazing to see just how good smart it is... even a crap tune it's hard to blow up a motor. 
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julex
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« Reply #18 on: August 28, 2013, 07:21:17 PM »

yes for newer flashed files where the ECU hasn't been able to fully set it's adaptation... since we're on the topic being in cars like that it's amazing to see just how good smart it is... even a crap tune it's hard to blow up a motor. 

On the subject. I;ve been tuning my PID for tial 770a and noticed how nicely "I" adaptation works too. Several pulls, with redefined rmp ranges since stock ones are useless for BT, and you know off the bat what to do with KFMIRL by just looking at adaptation values. If you overdo it, it goes into negatives, if not enough, it goes into positives. Pretty neat.
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nyet
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« Reply #19 on: August 28, 2013, 10:35:22 PM »

On the subject. I;ve been tuning my PID for tial 770a and noticed how nicely "I" adaptation works too. Several pulls, with redefined rmp ranges since stock ones are useless for BT, and you know off the bat what to do with KFMIRL by just looking at adaptation values. If you overdo it, it goes into negatives, if not enough, it goes into positives. Pretty neat.


yep... but the stock ranges dont make any sense... so if you want to rely on the i adaptations, make sure you tweak em to taste.
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« Reply #20 on: August 29, 2013, 02:16:36 AM »

I use the rear O2 input with Aquamist HFS-3 and switch FKKVS, KFZW, KFZW2 and LDRXN based on it.
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julex
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« Reply #21 on: August 29, 2013, 05:57:29 AM »


yep... but the stock ranges dont make any sense... so if you want to rely on the i adaptations, make sure you tweak em to taste.

"That's what I said" Smiley
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bk56190
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« Reply #22 on: August 29, 2013, 07:53:48 AM »

I use the rear O2 input with Aquamist HFS-3 and switch FKKVS, KFZW, KFZW2 and LDRXN based on it.

No rear O2 input on my 1.8T  Cry
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nyet
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« Reply #23 on: August 29, 2013, 08:28:18 AM »

"That's what I said" Smiley

LOL thats what i get for posting tired.

One more word of warning: if you tuning are near the MAP limit, or OVER the MAP limit, and your req is at or over actual (e.g with stock dslofs) the i-adaptation process may cause your dc to creep upwards, forever...
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julex
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« Reply #24 on: August 29, 2013, 08:36:42 AM »

LOL thats what i get for posting tired.

One more word of warning: if you tuning are near the MAP limit, or OVER the MAP limit, and your req is at or over actual (e.g with stock dslofs) the i-adaptation process may cause your dc to creep upwards, forever...

Roger. No excuse to run over map limit anymore though Smiley
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nyet
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« Reply #25 on: August 29, 2013, 08:38:07 AM »

Roger. No excuse to run over map limit anymore though Smiley

Yep. AND with all that headroom, the i-adaptation stuff is gonna run real good...
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catbed
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« Reply #26 on: August 29, 2013, 10:18:27 AM »

On the subject. I;ve been tuning my PID for tial 770a and noticed how nicely "I" adaptation works too. Several pulls, with redefined rmp ranges since stock ones are useless for BT, and you know off the bat what to do with KFMIRL by just looking at adaptation values. If you overdo it, it goes into negatives, if not enough, it goes into positives. Pretty neat.

Care to clarify? I'm a bit confused as how I adaptation determines changes to KFMIRL?

One more word of warning: if you tuning are near the MAP limit, or OVER the MAP limit, and your req is at or over actual (e.g with stock dslofs) the i-adaptation process may cause your dc to creep upwards, forever...

Also, I don't get what you mean by stock DSLOFS. Isn't DSLOFS sensor specific?
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ddillenger
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« Reply #27 on: August 29, 2013, 10:20:45 AM »

I assumed he meant DIMX.
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catbed
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« Reply #28 on: August 29, 2013, 10:25:44 AM »

I assumed he meant DIMX.

That's what I thought as well. Just making sure.
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nyet
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« Reply #29 on: August 29, 2013, 10:38:19 AM »

Nope. DSLOFS. It's mentioned several times in that context on the s4wiki tuning page

If you leave it stock, req can go over the MAP limit... which does really bad things to the PID, not to mention the I-limit.


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Please do not ask me for tunes. I'm here to help people make their own.

Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your ex
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