timing at -5
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Road Master
Joined: Sep 2007
Posts: 1,044
Likes: 13
From: Broken Bow Oklahoma
timing at -5
I have a pinging problem form 2250-3000 when I roll on quick, so I let the PV do a auto tune of the spark. Three auto tunes later and it is still pinging and some of the cells are at -5. It runs like crap now. Any ideas on what is going on here? Bike has a 110, B heads and S&S 557 cams.
Road Warrior
Joined: Apr 2017
Posts: 1,451
Likes: 230
From: United States
I have a pinging problem form 2250-3000 when I roll on quick, so I let the PV do a auto tune of the spark. Three auto tunes later and it is still pinging and some of the cells are at -5. It runs like crap now. Any ideas on what is going on here? Bike has a 110, B heads and S&S 557 cams.
James the man at fuelmoto ( thats if you got it from him ) . If its a tyneing problem , hell get it sorted for ya, Other than that. It might be mechanical like cams not installed properly.
let us know how it turns out
Wiz
Last edited by Wizardofaus; Aug 5, 2018 at 02:41 AM.
Tourer
Joined: Sep 2017
Posts: 358
Likes: 67
From: Dallas, TX
yea its trying to pull spark to keep the bike from detonating... detonation is bad, it will destroy ring lands in short order.
You need to figure out why its doing that.
Cam's installed a tooth advanced or retarded COULD cause it.
You say its when you roll on quick which could be a fueling issue.
I would want to get the bike on a dyno with a competent tuner who could diagnose the issue as well as fix the tune and not rely on the auto tune. IMO unless you have the full up setup with the real wide band O2 sensors, the auto tune isnt that great as it has to rely on the factory narrow band O2 sensors and from what I understand it interpolates that data. Your's appears to be registering the knock from the knock sensor and pulling timing.
You need to figure out why its doing that.
Cam's installed a tooth advanced or retarded COULD cause it.
You say its when you roll on quick which could be a fueling issue.
I would want to get the bike on a dyno with a competent tuner who could diagnose the issue as well as fix the tune and not rely on the auto tune. IMO unless you have the full up setup with the real wide band O2 sensors, the auto tune isnt that great as it has to rely on the factory narrow band O2 sensors and from what I understand it interpolates that data. Your's appears to be registering the knock from the knock sensor and pulling timing.
Seasoned HDF Member
Joined: Sep 2008
Posts: 14,144
Likes: 11,219
From: San Diego, CA
Is this all of a sudden, a slow onset, or after some engine work was done?
How was it tuned after the cam install...? How long ago was that done, and how had it run since?
Sounds like your timing map is off.... but hard to say over the internet.
You shouldn't use PV to adjust timing in AT basic. Pretty sure they suggest AT Pro with wideband O2 sensors should be used for timing sessions. Also, always tune fuel first, then spark.... The narrowband sensors in AT Basic, are good for adjusting a tune that is close. AT Basic does a good job of dialing in your VE tables to a close tune.
Did you save your tune prior to your AT runs? If so, I would load that tune back in, go for a ride, data log the ride, then send the log to FuelMoto to check it out. Tell them your issues with performanceand see what they say...
OR, if you have a good dyno tuner nearby, could be time for a professional tune....
How was it tuned after the cam install...? How long ago was that done, and how had it run since?
Sounds like your timing map is off.... but hard to say over the internet.
You shouldn't use PV to adjust timing in AT basic. Pretty sure they suggest AT Pro with wideband O2 sensors should be used for timing sessions. Also, always tune fuel first, then spark.... The narrowband sensors in AT Basic, are good for adjusting a tune that is close. AT Basic does a good job of dialing in your VE tables to a close tune.
Did you save your tune prior to your AT runs? If so, I would load that tune back in, go for a ride, data log the ride, then send the log to FuelMoto to check it out. Tell them your issues with performanceand see what they say...
OR, if you have a good dyno tuner nearby, could be time for a professional tune....
Last edited by hattitude; Aug 5, 2018 at 09:19 AM.
Thread Starter
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Road Master
Joined: Sep 2007
Posts: 1,044
Likes: 13
From: Broken Bow Oklahoma
It has the WB sensors and has been on a dyno, the dyno helped but didn't clear it up. The tune was done last year at Sturgis but I live in SE Oklahoma, It started pining about half way home. I guess it's the altitude and temp difference, maybe I should find a dyno closer to home.
Seasoned HDF Member
Joined: Sep 2008
Posts: 14,144
Likes: 11,219
From: San Diego, CA
It has the WB sensors and has been on a dyno, the dyno helped but didn't clear it up. The tune was done last year at Sturgis but I live in SE Oklahoma, It started pining about half way home. I guess it's the altitude and temp difference, maybe I should find a dyno closer to home.
Was it a reputable dyno tuner at Sturgis? Or, one that's just a mobil dyno going from event, to event.....
There are exceptions to every rule.... but.... most of the mobile bike-show dynos don't take the time to do a good, full tune. It's all about getting numerous bikes through their trailer to make money. If you spend your time doing quick, turn around tune jobs... how knowledgeable can you become?
I am not a tuner, but learned enough to know that a dyno tune is only as good as the guy running the machine....
Research tuners near your home. Find one that has a great reputation, and will be there to stand behind their tune.
Good luck....
Road Warrior
Joined: Mar 2010
Posts: 1,505
Likes: 56
From: Vancouver Island, British Columbia
Which brings up the question on who knows how to do a good tune in the Pacific Northwest using my Powervision?
I’m willing to travel!
Everybody out this way uses the TTS
I’m willing to travel!
Everybody out this way uses the TTS
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Tourer
Joined: Jan 2018
Posts: 319
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From: Seattle
Check out DynoSteve or Aaron at Thunder Valley Cycles. Others north of the city but these 2 have the best reps in the area.
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From: Vancouver Island, British Columbia
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