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Not knowing what's been done with the advance curve in my new TTP map I've taken the cautious approach and used 93 pump octane (sea level fuel) for the last couple of tanks. I'm prepared to experiment by trailing lower over the next few tanks but what are these maps intended for?

RON, MON or pump, I can translate.
 

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Octane is a function of cylinder compression, so it shouldn't be a factor in your tune; the tune is all about air/fuel ratio and ignition advance. Triumph says 87 octane or higher for the Scrambler. Anything higher and you're really just paying for the additive package.
 

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TTP maps also tweak the ignition timing to increase advance, so a higher octane rating than the Factory specifies is advisable for best performance. I personally use European 98 RON (89-90 MON or 93-94 AKI) but could get away happily with 95 RON (85-86 MON or 90-91 AKI) without noticeable effect on performance.


In my Mazda car with a 13:1 compression ratio and provided with pre-ignition or knock sensors, the difference is quite noticeable between octane ratings and although it'll take 95 RON, with the handbook advising that a slight loss in performance will be noticed, it runs a bit better with 98, the ECU makes alterations to cope with either fuel automatically.
 

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In our testing, you can use a high octane rated fuel with our tunes, but there really is no need as there is nothing within the tune that would require a higher rating than Triumph recommend for your bike. (not even the ignition advance Ernesto)

The 904s tunes are very different and require Super Unleaded or a high octane equivalent due to the higher compression ratio of the kit.
 

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Discussion Starter #5
In our testing, you can use a high octane rated fuel with our tunes, but there really is no need as there is nothing within the tune that would require a higher rating than Triumph recommend for your bike.
Perfect. Thank you. I wasn't sure about the ignition advance and I have a five gallon bucket full of melted pistons and rings in my basement. I don't need any more. I can only turn so many pistons into clocks for Christmas gifts...:wink2:
 

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The day I picked up my stock 2015 Speedmaster, I filled it up with 95 ron and rode it home.

It ran fine obviously but then I learnt that high octane wasn't needed, so I tried 91 ron. The bike didnt feel as crisp or as lively as what it did with 95 octane. Don't ask me why.

Nowadays, after a few mods and a TTP#3 tune I just use 98 and enjoy the ride.
 

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according to my owners manual the correct fuel grade is 95 RON minimum for Australia

in MON according to Wikipedia thats 84-85 mid grade in USA

I have tried all the different RON grades over several tank fills at a time. RON 91, 95 and 98

all achieved about the same MPG. 95 and 98 no discernible performance difference.
91 maybe not quite as much oomph, but hardly noticeable. I think with 91 more likely to get some pre-ignition under heavy load.

haven't tried any ethanol blends and don't know any one who has, fortunately it isn't that common in my area

so, based on my exhaustive and scientific experiments I just now use 95 :wink2:
 
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