Eliminating ping by adding fuel
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Road Captain
Joined: Jun 2010
Posts: 528
Likes: 44
From: Jakarta - Indonesia
Eliminating ping by adding fuel
Have tuned my VE till it show only 1% change after auto tune, then setup the timing table to a fairly aggressive timing table adding anywhere between 4 to 9* to the table, idling at 21 cruise at 36 and go up from there maxing at 45.
I like the instantenous throttle response and the engine is very aggressive, I like it much, soooo much nicer compared to standard weak timing table, but obviously it pings. It only pings on high load or when I crack the throttle suddenly, doesn't ping when accelerating not too aggressively, once it reach speed or on constant high speed. Done a few log tune to spot knock retard, after the third log tune i started to feel the throttle response weaken and engine doesn't feel aggressive anymore, didn't like it, decided to go back to the second log tune timing table.
Currently anti knock would pull 0.5-4* max on hot weather. Now I am trying to use different strategy to help with the ping, should I add fuel to the affected cells by changing AFR/lambda or adding VE??
I like the instantenous throttle response and the engine is very aggressive, I like it much, soooo much nicer compared to standard weak timing table, but obviously it pings. It only pings on high load or when I crack the throttle suddenly, doesn't ping when accelerating not too aggressively, once it reach speed or on constant high speed. Done a few log tune to spot knock retard, after the third log tune i started to feel the throttle response weaken and engine doesn't feel aggressive anymore, didn't like it, decided to go back to the second log tune timing table.
Currently anti knock would pull 0.5-4* max on hot weather. Now I am trying to use different strategy to help with the ping, should I add fuel to the affected cells by changing AFR/lambda or adding VE??
Last edited by uwiik; Oct 19, 2013 at 08:29 AM.
Thread Starter
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Road Captain
Joined: Jun 2010
Posts: 528
Likes: 44
From: Jakarta - Indonesia
From 3 log tunes I get mostly 0.5-2.5 pull but some cells showing as much as 6* pull in some area (75-90kpa 2500-4500 RPM), and that's where the throttle response start to suffer, I am sure if I keep on doing another log tunes and pull more to get rid of the ping my throttle response is going to suffer further...
Last edited by uwiik; Oct 19, 2013 at 10:59 AM.
Thread Starter
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Road Captain
Joined: Jun 2010
Posts: 528
Likes: 44
From: Jakarta - Indonesia
Indonesia and almost the rest of the world use RON for octane ratin, whereas US use AKI if i am not mistaken. The most commonly fuel I use that's available everywhere is RON 92=AKI 87, sometimes RON 95=AKI 90 and when I am feeling generous RON 97=AKI 92.
Road Warrior
Joined: Apr 2010
Posts: 1,648
Likes: 37
From: Monroe, Louisiana
I suggest you splurge on the good gas. The timing from 2500 at 18 and up to 32 at 5500 is the most I have tried in the 100% range. The fuel should be above 90 also in this range. Don't sweat the 2.5 and lower spark knocks. They will drive you nuts. I have had some 4 and 6 if I hit the throttle real hard while doing log tune but haven't had any audible ping. If you aren't getting audible ping let the system do its job.
Thread Starter
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Road Captain
Joined: Jun 2010
Posts: 528
Likes: 44
From: Jakarta - Indonesia
I suggest you splurge on the good gas. The timing from 2500 at 18 and up to 32 at 5500 is the most I have tried in the 100% range. The fuel should be above 90 also in this range. Don't sweat the 2.5 and lower spark knocks. They will drive you nuts. I have had some 4 and 6 if I hit the throttle real hard while doing log tune but haven't had any audible ping. If you aren't getting audible ping let the system do its job.
The problem is all spark knock indicated by my PV is always accompanied with audible ping, I can hear rattle can like sound even if it's only in a very short period, but I definitely can hear it. Did a ride on 95F weather today, max retard pull was *2.5, but definitely heard audible ping....
I hear a lot of mixed opinion, some say if bike runs good don't worry about short audible ping, 103" will ping no matter what I do, but some also claims that ping can be eliminated even on 103"...
I attached my spark table and AFR table, based on your indication on max spark mine is definitely so much more aggressive, should I back it down?? Like I said, I have done quite a bit more Log Tunes to the point where my ping is almost completely gone. However, I really do not like how my throttle response suffer after that...
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Elite HDF Member
Joined: Apr 2012
Posts: 3,986
Likes: 709
From: San Diego
If you are running low octane gas and getting audible ping you need to remove timing. You will damage your engine.
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