I have a 07 Street Glide with a 107ci and recently installed the Target Tune module in addition to my Power Vision. Made numerous auto tunes runs with the installed wide band O2 sensors etc. Bike running decent but once it warms up I get the freaking pinging when cruising in 6th gear and when in 1st when staring after a full stop. Typically in the 2000-2750 range. I have a Jagg Oil cooler and Wards Fans and I still have the same issue when the ET hits 235F. Anyone with experience with making adjustments in the WinPV tables would be appreciated. I have sent my tune to FM for adjustments but so far no change in the issue of pinging. I have heard that changing the timing is probably the solution, but I don't want to F... up the tune being a rookie at messing with the tables.

 

theory- higher combustion chamber temps essentially act to advance ignition timing by a few degrees.

so it could well be that you timing needs to be altered-
when the throttle is opened suddenly, like to accelerate, the timing should retard.
on most motors the intake vacuum is used to control this...on an old v8 a vacuum advance on the distributor was used, on the carbed HD's a VOES switch on the intake and now with EFI a sensor- ensure that the timing is retarding when the vacuum drops. ( on my old panhead, the left twist grip controls timing- the rider advances and retards spark timing to keep the motor working as best as you can- on old cars the spark advance might be a lever on the steering wheel)

fuel mixture- too lean will ping- alot of riders and crap tuning techs will not recognise a vacuum/advance problem and just add fuel- that would be the guys with soot on the backs of their bikes- you've seen and smelled them on the road.

tuning is always a balancing act and the multiple factors have to be considered, just "more fuel" isn;t always the fix and too rich is bad for performance and bad for the motor over time


physical problem: "glow plug" carbon deposits built up in the heads or pistons and/or a sharp protrusion of metal, a sharp edge can get hot and act as a glow plug, causing the fuel/air mixture to ignite before the spark.
previous pinging can cause these sharp edges as the metal is damaged- it only gets worse

If you are working with FM, the better the info you give them regarding throttle position and rpms, the better they can work with you- I am sure that they can give you best advice.

Mike

 

Thanks, the motor only has 3k on it so I doubt there is a carbon buildup. I am sending FM a couple logs and maybe they can find a solution. But I would also like to drop the timing in the areas where I am getting the pinging.

 

great- fresh motor- fewer intangibles/variables.

I am sure you'll get this sorted- I forgot to mention octane- I do pretty ok on 89 but 91 allows the ecm to fully advance spark timing.
fully advanced timing is used for economy ( mpg) at part-throttle cruising
fuel additives such as sea-foam can cause trouble here too until it runs through

one more thing: the ecm uses ion-sense to evaluate the state of burn in the combustion chamber, and this will help control spark. many models have problems if the plugs or wires are changed from stock spec- even screamin' eagle can cause problems

mike

 

Always use 91-93 octane and have used different gas treatments. Also have stock wires and plugs. I have tried a couple other brand plugs, but no change in the pinging. Have heard about using Denso Vrod plugs, colder plug but doubt that will make any difference.