A new thread about pinging
True knock.is pre-ignition. The plug fires to soon in the combustion cycle (piston isn't up enough in the cycle before the spark ignites and tries to force it back down). Ideally you don't want any. That's are different approaches on how to cure spark knock. Retarding the ignition timing or adding fuel to the effected area is the most common. running higher octane fuel or running a cooler spark plug can also help.
Detonation occurs after the spark plug ignites the mixture.
Allen Kline was an angineer on the Northstar project. He wrote a very interesting article on the subject. Here's a link.
http://www.contactmagazine.com/Issue...ineBasics.html
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Cruiser
Joined: Feb 2015
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From: Arizona
I might be beating a dead horse, but if you've got the original plugs, I'd put them back in and see if the knock events go away. I chased some pretty significant knocks under WOT upper mid-range on the TG, swapped plugs between cylinders, knock events went with the plug. New set of plugs gapped .035, no more knock count on PV.. As I said before, you might have an underlying issue that ION sensing was masking.. I just don't like the fact that this was introduced at the same time you changed plugs..
Thanks!
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Cruiser
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From: Arizona
Thanks to all for your replies. I have some things to do when I get back home - have to email my current map to Chad and to replace the existing with the original plugs to see if it goes away.
Just wanted to let everyone know that I can't try these things until I get home this weekend and the possibility exists that I may not get home until the 28th depending on my current client. Just don't want folks thinking I lost interest - just traveling.
Thanks again for your input.
Just wanted to let everyone know that I can't try these things until I get home this weekend and the possibility exists that I may not get home until the 28th depending on my current client. Just don't want folks thinking I lost interest - just traveling.
Thanks again for your input.
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Cruiser
Joined: Feb 2015
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From: Arizona
You can manually edit your Spark tables in the areas it's detecting knock. At a quick glance it's detecting a little in the 40-60kpa areas both front and rear.. If you want you can email your MAP to me at chad@wideopencycles.net and i'll make a few quick changes and you can do another data log.
My assumption is that I would send the base map/tune that was given to me by FM?
Thanks
Pre-ignition is defined as something causing the mixture to ignite before the plug does. Too advanced timing may be what you mean and that can be corrected by retarding the timing.
Detonation occurs after the spark plug ignites the mixture.
Allen Kline was an angineer on the Northstar project. He wrote a very interesting article on the subject. Here's a link.
http://www.contactmagazine.com/Issue...ineBasics.html
Detonation occurs after the spark plug ignites the mixture.
Allen Kline was an angineer on the Northstar project. He wrote a very interesting article on the subject. Here's a link.
http://www.contactmagazine.com/Issue...ineBasics.html
Thread Starter
|
Cruiser
Joined: Feb 2015
Posts: 238
Likes: 0
From: Arizona
You can manually edit your Spark tables in the areas it's detecting knock. At a quick glance it's detecting a little in the 40-60kpa areas both front and rear.. If you want you can email your MAP to me at chad@wideopencycles.net and i'll make a few quick changes and you can do another data log.
Just emailed you the map and log (sent in case you deleted).
Thanks again!
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Cruiser
Joined: Feb 2015
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From: Arizona
Resurrecting this thread - I have had time to give this some attention.
Here is what has been done so far -
I have included the logs from a ride. The bike runs pretty well, but the gas mileage is pretty horrible (39) after auto tuning and it was 44 before. It also pops and backfires a bit sometimes at idle giving it throttle.
Question - will the auto tune resolve these issues? The current tune is the result of about a 1 hour auto tune session, seems to have gotten a bit better but the throttle issue and gas mileage need to be corrected.
Thanks for looking!
Here is what has been done so far -
- Chad (Wide Open Cycles) generously sent me a tune to start with that modified the spark tables.
- I loaded that tune and then immediately started an auto tune session.
- The pinging seems to have gone away, but I know there are tuning opportunities with this tune.
I have included the logs from a ride. The bike runs pretty well, but the gas mileage is pretty horrible (39) after auto tuning and it was 44 before. It also pops and backfires a bit sometimes at idle giving it throttle.
Question - will the auto tune resolve these issues? The current tune is the result of about a 1 hour auto tune session, seems to have gotten a bit better but the throttle issue and gas mileage need to be corrected.
Thanks for looking!
Last edited by gilbert_roadking; May 9, 2016 at 01:43 PM.
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Joined: Jan 2008
Posts: 6,532
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From: SoCal
Resurrecting this thread - I have had time to give this some attention.
Here is what has been done so far -
I have included the logs from a ride. The bike runs pretty well, but the gas mileage is pretty horrible (39) after auto tuning and it was 44 before. It also pops and backfires a bit sometimes at idle giving it throttle.
Question - will the auto tune resolve these issues? The current tune is the result of about a 1 hour auto tune session, seems to have gotten a bit better but the throttle issue and gas mileage need to be corrected.
Thanks for looking!
Here is what has been done so far -
- Chad (Wide Open Cycles) generously sent me a tune to start with that modified the spark tables.
- I loaded that tune and then immediately started an auto tune session.
- The pinging seems to have gone away, but I know there are tuning opportunities with this tune.
I have included the logs from a ride. The bike runs pretty well, but the gas mileage is pretty horrible (39) after auto tuning and it was 44 before. It also pops and backfires a bit sometimes at idle giving it throttle.
Question - will the auto tune resolve these issues? The current tune is the result of about a 1 hour auto tune session, seems to have gotten a bit better but the throttle issue and gas mileage need to be corrected.
Thanks for looking!
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Joined: Aug 2014
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From: Utah
Hey what was your issue you stated in the original post? I just did Andrews 48h cams and I am having an ordeal with it when I start moving from a stop. It bogs real bad. What was your issue if you don't mind?
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Cruiser
Joined: Feb 2015
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From: Arizona
If you have a PV then ask the folks at Dynojet to send a new map and give them your configuration, if not then I will have to defer to the folks on here because I would have no idea how to fix that outside of being able to adjust parameters within the ECM.
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