How do I stop the ping?
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Intermediate
Joined: Aug 2007
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How do I stop the ping?
I am currently breaking in my new 95 build. After about 30 miles I noticed it is pinging at low rpm when I lug 4th or 5th. I have read complaints from others using the 37g with too much compression. I calculate my comp to be 9.8:1. My build is 95CI, 37G, SE high comp forged pistons (9.6:1), .030 cometic, stock heads (for now), BS staggered, Bick sucker, sert, 91 octane.
I am currently using a canned map from the sert disk. It is 105hd019. Should I use the next one up 105hb025? The bike runs awesome and pulls great if I keep the rpms up.
Any help will be appreciated. Thanks
I am currently using a canned map from the sert disk. It is 105hd019. Should I use the next one up 105hb025? The bike runs awesome and pulls great if I keep the rpms up.
Any help will be appreciated. Thanks
Outstanding HDF Member
Joined: May 2007
Posts: 2,304
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From: Florida
RE: How do I stop the ping?
When you use anything other than SE pipes or cams those canned maps are far off the target your looking for. If it is detonating badly go to the Tunining Constants and tell the ECM it is a 103'....this will richen it up until you get it on a dyno. Don't wait until you get 1000 miles on it get it tuned quickly.
Extreme HDF Member
Joined: Apr 2006
Posts: 10,449
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From: Roswell, GA
RE: How do I stop the ping?
If you have a laptop, do a SERT data run and replicate the pinging. Then get off the bike and look at the data to identify where you have pinging/knock. You can add fuel or retard timing in those cells where pinging is identified. Try adding a little fuel first to get rid of the ping/knock in the affected cells. Then do a test ride to see if you have gotten rid of the pinging.
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Intermediate
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RE: How do I stop the ping?
I copied the spark advance table off of the head quarters website. The description on the website matched my issue perfectly. It retards the timing in the 40-70 areas but keeps it up at wide open throttle. The ping is gone. I would rather have solved the problem by adding fuel in those areas, but I'm not sure how to go about it. Do I lower the af ratios or raise the ve values?
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Stage II
Joined: Nov 2007
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RE: How do I stop the ping?
not all af curves r going to be the same for every bike but they will be close thats why they have maps for certain bikes i would get it close to your spec right around 14:1 af and then have a good tech dyno your bike thats doesnt mean 3 pulls and your tuned im talking about setting each throttle position and every rpm thats a correct dyno tune. It sounds like your bike is running to lean.
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