SixSeven
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« Reply #90 on: September 18, 2013, 12:33:06 PM »
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I finally got around to enabling this feature on my ATW 1.8t and have a bit of information to share. I noticed a couple posts about not getting the limiter to bounce around your set launch RPM and ran into this issue myself. I believe the root cause of this is the PID controller for the DBW throttle doing its job too well. What I found was the ECU was able to control the RPM adequately employing only the throttle plate and never hit the fuel-cut unless DNMAXH was set quite low (on the order of 10 RPM). I think this is particularly true if you still have a heavy DMFW since the moment of inertia is quite high, thus slowing the rate of change of engine speed and reducing the need for the fuel cut. To get around this, I set DNMAXH to a reasonable value, I think it's around 30 or 40 RPM, and just blip the throttle a couple times when I'm nearing my launch RPM. The throttle blip is enough to "confuse" the throttle PID so that the fuel cut comes on. Using this method I've been able to get my boost needle to bounce around 0 psi which isn't much, but at least it's better than launching under vacuum. I hope this makes sense to all of you, if not I can try to clarify.
Cheers.
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krazydbiker
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« Reply #91 on: September 25, 2013, 04:28:29 PM »
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hmm, i'm going to give this a shot, i'm having the same issue, controller doing its job and closing throttle plate, dang it bosch for being smart.
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krazydbiker
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« Reply #92 on: October 07, 2013, 09:19:39 AM »
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Soooo got it working... Used 30 for rpm and it broke that throttle pid some... That mixed with removing torque limit and modifying throttle opening works like a charm... Awd burnout
edit : throttle pid still closes the throttle some, but the hard limit does its work
and the throttle modification was to open 100% right as i took off.
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« Last Edit: October 07, 2013, 02:19:08 PM by krazydbiker »
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andyc1234
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« Reply #93 on: October 16, 2013, 06:57:15 AM »
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What map was altered for the throttle modification?
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SixSeven
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« Reply #94 on: October 17, 2013, 08:49:19 AM »
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Soooo got it working... Used 30 for rpm and it broke that throttle pid some... That mixed with removing torque limit and modifying throttle opening works like a charm... Awd burnout
edit : throttle pid still closes the throttle some, but the hard limit does its work
and the throttle modification was to open 100% right as i took off.
Glad you got satisfactory results! I'm curious, what torque limit are you referencing? |
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krazydbiker
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« Reply #95 on: November 07, 2013, 09:01:55 AM »
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i think the maps i modified were KFMDBGRG, my car was limited, i removed that and it definitely seemed to help with the take off the throttle modification was KFWDKSMX, my throttle was not opening 100% until after 4k..... it will not bypass the throttle pid or anything but setting rpm to 20 to and bumping throttle a few times gets it to pop, when i let out the clutch it just burned the tires, good enough for me on AWD here is a short clip of it in action http://www.youtube.com/watch?v=osJlZC27EoQi left traction control on which is why first gear stopped burning out  forgot |
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SixSeven
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« Reply #96 on: November 19, 2013, 01:50:29 PM »
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That looks very similar to the behavior I've ended up with. I have to say I got a good chuckle out of the 1.0 MPG as well!
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em.Euro.R18
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« Reply #97 on: February 13, 2014, 12:33:04 PM »
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So I attempted this on an avant CH although I don't think I found cwnmaxmd (11AEB?) in hex 8-bit values are 30 so I left it unchanged. With Nmax set to 4000. The rest I used suggested settings. Idle ends up jumpy, part throttle is rough (hard on/off feel).
used these adresses: with LSB first marked
VNMX 11AFB 8bit
DNMAXH 16494 16bit
ITNMXH 16498 16bit
NMAX 1649A 16bit
NMAXOG 164A2 16bit
TMOTNMX 1F9EA 8bit - signed marked
TNMXH 164A6 16bit
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userpike
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« Reply #98 on: February 25, 2014, 09:53:08 PM »
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I was playing around with this and I'm getting the same issues as the last few posters, but added to that, if I'm in neutral without the clutch pushed in and I hit the gas, the launch control kicks in and doesn't matter if the engine is cold or warm... isn't it NOT supposed to unless the clutch is depressed?
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ddillenger
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« Reply #99 on: February 25, 2014, 10:16:12 PM »
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That is hard launch guy. This is soft launch.
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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 experience!
Email/Google chat:
DDillenger84(at)gmail(dot)com
Email>PM
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userpike
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« Reply #100 on: February 25, 2014, 11:45:51 PM »
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oh.. OK. I thought something was wrong. Thanks for clarifying dd!
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scotties4
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« Reply #101 on: May 04, 2014, 12:57:15 PM »
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can this be done on the c box ecu
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partyshooter
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« Reply #102 on: June 14, 2014, 02:18:06 PM »
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i have one question,does this cut just the ignition or also the fuel?
because if this cuts just the ignition the cat will be damaged
greetings from germany
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ddillenger
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« Reply #103 on: June 14, 2014, 03:23:23 PM »
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i have one question,does this cut just the ignition or also the fuel?
because if this cuts just the ignition the cat will be damaged
greetings from germany
Fuel. |
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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 experience!
Email/Google chat:
DDillenger84(at)gmail(dot)com
Email>PM
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Lyonz
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« Reply #104 on: July 12, 2014, 12:35:16 PM »
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Hi,
Is it possible to have your help please with my RS4 B5 file for ALS/NLS
Thank you
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