Heres a cross reference chart for anyone interested.

http://www.harley-performance.com/ha...park-plug.html

 

I use Sea Foam regularly. It's the same stuff as Chevron Techron.

 

I am getting some pinging from about 2800 to over 4000 rpms. I tried to enrichen this area but it had no effect. I still get it while I am doing a super tune run and the timing gets retarded 4deg. when doing a super tune flash so timing shouldn't be an issue. This one has me baffled I'd be interested to see if the plugs work for more people. The above referenced plug comparison anly shows 88 & 96 inch TC's is the 103 the same?

 

standard Vrod plugs work also, they are colder too.

 

So fabrik8r (jason) has it been determined a cooler plug has a positive affect on intermittent pinging? Is there a recommended plug of choice without going to an iridium for example?

 

I never got around to a dedicated study on different heat range plugs, I've run most of the common recommendations for colder plugs and I havent noticed anything remarkable from any of them. I'm currently running the the 10R12 VROD plugs, and the bike is about as cool as it can be with cylinder fans and a fan on the oil cooler, It's got a good tune but I havent messed with timing because I cant "see" whats going on with the PCIII, Some day I'll get the TTS so I can further optimize the tune. I still get an ocasional ping, easiest and cheapest fix I've found is a downshift.

 

Frenchy whats the concentration level your using with the seafoam?

 

Do you think the standard plug that comes stock is a hot plug and the reason your using Vrod plugs?

 

Well after spending a boatload of time reading about every tuner used and the hows and whys as well as dooshing my system with Seafoam and going to cooler plugs Ive decided on the PCV. I spoke to Jaime as to the reasons these big twins start to ping as the miles add on and the PCV is defenitely what I need. Thanks go out to 2black1s, iclick and journeyman for their contributions. I dont have the funds or the right o2 bung size, not to mention the proper location on my existing header so an Auto tune is not possible without either a differant header or having 18mm bung holes welded. Jaime is installing a map for my particular setup and with the help of the knowledgable members Im going to alter the timing until its a thing of the past and I will be documenting my findings to add to all the info available on this sight.

 

Sorry for my late reply. I use 1/2 of a can (8oz) in a full tank every 1,000 miles or so.