Ping at low revs when accelerating - Kawasaki ZX-10R.net
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post #1 of 12 Old 12-05-2005, 05:12 PM Thread Starter
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Ping at low revs when accelerating

Hi. I've been hearing light pinging at low revs (1,500 - 2,500) when accelerating away from a stop. You can see my mods in my signature. I'm guessing the PCM is too lean at partial-throttle openings at those rpms? When I look at the map it does show negative values at low throttle openings. My map is from Dynojet for a Akra pipe with stock filter. I haven't made any changes to it yet. Any suggestions? I guess I could start by enriching those partial throttle, low rpm values? Can you think of any other reasons for the pinging? Thanks.

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post #2 of 12 Old 12-06-2005, 09:51 AM
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sounds like your answering all of your own questions.. Yes richening up the low rpm circuits will rectify your situation. I have tried a couple of maps that did the same thing for me as well.

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post #3 of 12 Old 12-06-2005, 10:26 AM
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My 05 is bone stock and it does the same thing.
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post #4 of 12 Old 12-06-2005, 12:15 PM
 
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The engine isn't designed to operate a large throttle openins and low rpm. If you are gonna nail it keep the rpm up.
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post #5 of 12 Old 12-06-2005, 01:35 PM
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What octane rating are you using? Also, is it a cali spec bike?

I have never heard any pinging on my bike and I have similar mods. I only run 94 octane in it.
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post #6 of 12 Old 12-06-2005, 01:44 PM
 
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Mine pings also. After switching fuel I found it only likes Shell
V-power
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post #7 of 12 Old 12-06-2005, 02:06 PM
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Mine never did it bone stock but once I started playing with installing different maps I noticed it instantly with some maps.

05 lime green. Sato slip-on, pc3usb, bmc race filter.
"when ya lose site of why ya ride then you've lost what really matters"---THE MOTORHEAD
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post #8 of 12 Old 12-06-2005, 02:25 PM
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I've never had any ping and I have my ignition advanced and run midgrade fuel. Sea level may be my savior. As stated above, adjust the map.

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post #9 of 12 Old 12-06-2005, 05:46 PM
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All we have here at the pump is 91 octane. We are at altitude 6000 ft. I usually see cars run a little rich. I would imagine bikes would act similar.
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post #10 of 12 Old 12-06-2005, 06:15 PM
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Hmmm... Interesting, most of my riding is at around sea level, but on my mountain roads rides I have yet to notice any pinging or anything either.

I know it has been mentioned that there might be a tad too much ignition advance down low on 10R's. Maybe the answer to the problem is to pick up up a dynjet ignition module and retard the timing at lower rpms.
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