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[JDOFLHRIDER]

This works good .   http://www.tibbelsfishing.com/index_files/page513.htm

[Big Dog]

No problem getting 91 octane in Canada, some stations even have 93 octane. I remember Sunoco having 93/94. Most gas in Canada now has 10% ethanol. FWIW  twinotter 

I can even get 97 octane from a dedicated Chevron pump in Abbotsford, BC and yes, over 90 is easy to find, if it really is that in them there tanks.

[North Georgia Hawg]

I run the 104 Octane Boost in both of my trucks... But, why does every Fuel Injected Harley Owners Manuals explicitally tell you Never add an Octane Boost to your system.

Something on the lines that "It Will Damage The System".

The best we can get here in my area is 90oct from the Chevron stations.

Getting ready to ride through Canada, and have been told I might get lucky to even find 90oct (although I seem to remember finding it, or better).

So, I guess my question is "What Damage to the System is Harley referring to"?   

Because it gives them another reason to deny your warranty claim? 

Just my opinion - but a good tune should not ping. If it's pinging, then the timing is too advanced for the CR and the stoic of the fuel being used. The best solution is to get the timing and lambda (AFR) correct for your build in the ECM calibration.

Octane boosters are fine for situations where you can't get fuel with a high enough octane content - but I would not want to have to rely on them all the time to prevent pinging. If your bike is pinging consistently, your tune is off and it needs to be adjusted so that your engine does not ping. Of course, all other things being equal, the higher the CR the more it will tend to ping on a certain octane content, and higher CRs need more octane to prevent pre-ignition and detonation.

The Knock Retard table in the ECM can help - but I don't think it will, or would ever need, to retard timing anywhere near 30 degrees. 2 degrees to a max of 5 degrees is what the TTS calibrations generally use.

[StrokedRider]

Man i just HATE to think that i need to take my stock bike to the stealer and pay to have them "set my timing"?!!!!!

[North Georgia Hawg]

Man i just HATE to think that i need to take my stock bike to the stealer and pay to have them "set my timing"?!!!!!

Again, just my opinion... you can play with timing advance with the TTS and do data runs until you see knock detect, and then back off the timing in those cells a couple of degrees... but it's a lengthy, tedious process. A shorter, but more expensive, way is to have a dyno run done by someone who really knows what they are doing with the TTS, and have the timing set correctly everywhere. But don't assume that just because you have a dyno tune done, the timing really was set correctly across the map... I simple TQ/HP printout tells you nothing about the timing. Only the calibration file itself will show you where the timing is actually set for each RPM/kPa cell. It's a Trust, but Verify scenario...

I prefer to do it myself with the TTS - because I am a control freak and I want to know exactly how my tune is working, and why. I currently have the timing advanced by 1, 2, and 3 degrees from the TTS ETA009-003 cal we started with progressively at higher RPM/kPa values - starting at 3000 RPM and 50 kPa. No pinging yet, so I'll keep advancing it progressively a degree at a time in each area until a data run shows knock detect - then I'll back it off 2 degrees from there for safety. The ECM knock detect will protect your engine - but it does this by slightly retarding the timing for a period of time. I don't want my ECM making these "detuning" timing adjustments continually - I want the timing to be correct in the cal - so I strive to get the timing as advanced as possible without the ECM Knock Detect ever kicking in. However, this approach is definitely not for everyone...