jmont23
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« Reply #315 on: September 19, 2013, 08:26:11 AM »
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We can try to set RPM Threshold for Knock detection to 8000rpm while launching  Or does somebody know better map to do this? greets andy I'm not getting any knock during my launch, only while I shift with NLS. |
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Jason
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« Reply #316 on: September 19, 2013, 09:29:20 AM »
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The question is - should you disable knock control? Maybe the engine really is knocking?
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prj
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« Reply #317 on: September 19, 2013, 01:50:18 PM »
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The question is - should you disable knock control? Maybe the engine really is knocking?
It's not. |
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Jason
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« Reply #318 on: September 19, 2013, 02:12:50 PM »
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It's not.
The reason I ask is that when I was using this code I was cracking spark plugs. |
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hammersword
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Revlimit ECU tuning
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« Reply #319 on: September 19, 2013, 03:35:18 PM »
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I don't have at all neither knocking nor timing retard at block 020!
It is weired!
cracking spark plugs = detonation
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Jason
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« Reply #320 on: September 19, 2013, 03:37:36 PM »
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I don't have at all neither knocking nor timing retard at block 020!
It is weired!
cracking spark plugs = detonation
Right... and with no change to the tune, just disabling ALNLS, the problem stopped. |
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maZer.GTi
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« Reply #321 on: September 19, 2013, 03:43:54 PM »
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I logged Timing Retard during NLS now, i noticed in one car i have always ignition retard during nls and in other car i havent.
Same ECU (032HN), in one engine i got very strong engine bearings (without knock) and in other i think the downpipe or some part of exhaust is hitting something during fast shifting.
If i Shift slower i have no ignition retards, also im 100% sure its something hitting the engine or exhaust parts.
Maybe thats your problem too?
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prj
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« Reply #322 on: September 20, 2013, 03:23:36 AM »
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Right... and with no change to the tune, just disabling ALNLS, the problem stopped.
Use better spark plugs.. but really, if you cut spark there is nothing to cause knock. There can of course always be pre-ignition, but pre-ignition is silent, and at least on gasoline it is very hard to produce. |
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sn00k
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« Reply #323 on: September 20, 2013, 04:12:31 AM »
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ive too noticed high CFs, and im 110% cirtain i can hear pinging at most NLS shifts.
gasoline is very resistent to preignition per se, iirc ~280degC or so, but perhaps this phenomenon is caused by the combustible gas-mixture that passes right thru the cylinders and into the hot exhaust gasses/valves/turbine, ignites there and backfires into the cylinders when the valves are open.. just a thought.
leaning out/enriching/cutting fuel at the same time as the spark should prevent this..
i understand this detonating in the exhaust manifold is a somewhat desirable effect for the big-turbo users, used to minimize lag when shifting, since it gives a huge boost to the exhaust gasses, temps and turbine to keep the turbo spooled.
perhaps cutting fuel alone would prove a softer and better NLS for stage 1-3 tunes..?
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jmont23
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« Reply #324 on: September 20, 2013, 06:36:05 AM »
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I logged Timing Retard during NLS now, i noticed in one car i have always ignition retard during nls and in other car i havent.
Same ECU (032HN), in one engine i got very strong engine bearings (without knock) and in other i think the downpipe or some part of exhaust is hitting something during fast shifting.
If i Shift slower i have no ignition retards, also im 100% sure its something hitting the engine or exhaust parts.
Maybe thats your problem too?
I have very stiff motor mounts and trans mounts. So I doubt the motor is moving around very much. Jason, how many NLS did you need to do till you noticed cracked spark plugs. I have only used NLS 4 or 5 times due to all the timing that gets pulled. |
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Jason
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« Reply #325 on: September 20, 2013, 09:17:07 AM »
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I'm not really sure, I used to use it all the time until I started blowing up map sensors. I'm 95% certain it's pinging. You can hear it... Here's a video where you can hear it pinging. While yes, you're cutting spark, it's not to say there isn't an abnormal combustion event. Take a close listen and tell me it's not pinging: http://www.youtube.com/watch?v=i8J_giRUpgIHere's a video of a map sensor failing: http://www.youtube.com/watch?v=50Po5VZbR0g |
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adam-
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« Reply #326 on: September 21, 2013, 11:10:43 AM »
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Think there's something wrong with the 032HN one I'm using, too. I ruined a set of plugs, and coils.
And it's working when I'm moving, too. And bangs everytime I shift over the AL RPM..
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ddillenger
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« Reply #327 on: September 21, 2013, 11:33:26 AM »
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perhaps cutting fuel alone would prove a softer and better NLS for stage 1-3 tunes..?
This is how the quickshifter on my bike operates, and that routinely sees 18,000RPM WOT shifts. My fuel cut duration is 500ms, haven't crunched a gear yet. Think there's something wrong with the 032HN one I'm using, too. I ruined a set of plugs, and coils.
And it's working when I'm moving, too. And bangs everytime I shift over the AL RPM..
Sounds like your ecu isn't getting a VSS signal. |
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« Last Edit: September 21, 2013, 11:54:20 AM by ddillenger »
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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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adam-
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« Reply #328 on: September 22, 2013, 01:52:54 AM »
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Thinking that, but why do the clocks work? I thought they were the same signal? Saying that, the traction control light has just come on, so either an ABS sensor, or a MAF.. But the MAF is brand spanking!
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jmont23
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« Reply #329 on: September 23, 2013, 05:45:31 AM »
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This is how the quickshifter on my bike operates, and that routinely sees 18,000RPM WOT shifts. My fuel cut duration is 500ms, haven't crunched a gear yet.
If only my s4 had a sequential dogbox that didn't drop 3500 rpm from 1st -> 2nd haha |
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