|  | Topic : High Octane Fuel and Mapping |  |
| | | TarkMalbot | | Set |  |  | | Reg. Date | : | 07/09/2011 | | Posts | : | 143 | | Location | : | Carlisle, Cumbria, United Kingdom |
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| | Posted : 11 Nov 2012 - 21:51 Post title : High Octane Fuel and Mapping | | | Here in the UK I run my car and bike on 99 RON Premium unleaded fuel.
I am currently running the DizzE NoCat1700Map18 and was wondering if running a higher octane fuel would be a waste of time depending on what fuel was used to create the map?
| Thunderbird 1700 Big Bore
Tors, IGT, De-Cat, Seat Hack & PCV
T Bars, Dart Screen, LongHaul & Back Rest/Rear Rack
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| | | mjgt | | Thor | |  | | Reg. Date | : | 16/09/2011 | | Posts | : | 2,201 | | Location | : | North Somerset, United Kingdom |
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| | Posted : 11 Nov 2012 - 21:55 Post title : Re: High Octane Fuel and Mapping (Re: TarkMalbot) | | | To get the best out of high octane fuel you will probably need to advance the timing a little, I am not sure the american market has fuel that high as it is measured a differet way.
| Mick . . .  Keep the rubber side down!!
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| | | TarkMalbot | | Set | | | | Reg. Date | : | 07/09/2011 | | Posts | : | 143 | | Location | : | Carlisle, Cumbria, United Kingdom |
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| | Posted : 11 Nov 2012 - 22:06 Post title : Re: High Octane Fuel and Mapping (Re: mjgt) | | | Copied from Wikipedia whilst doing my research:
Anti-Knock Index (AKI)
In most countries, including Australia and all of those in Europe, the "headline" octane rating shown on the pump is the RON, but in Canada, the United States and some other countries, like Brazil, the headline number is the average of the RON and the MON, called the Anti-Knock Index (AKI, and often written on pumps as (R+M)/2). It may also sometimes be called the Pump Octane Number (PON).
Difference between RON and AKI
Because of the 8 to 10 point difference noted above, the octane rating shown in Canada and the United States is 4 to 5 points lower than the rating shown elsewhere in the world for the same fuel. See the table in the following section for a comparison.
Observed Road Octane Number (RdON)
The final type of octane rating, called Observed Road Octane Number (RdON), is derived from testing gasolines in real world multi-cylinder engines, normally at wide open throttle. It was developed in the 1920s and is still reliable today. The original testing was done in cars on the road but as technology developed the testing was moved to chassis dynamometers with environmental controls to improve consistency.
So the 99 RON fuel I use is equivalent to 87 MON and 94 AKI.
| Thunderbird 1700 Big Bore
Tors, IGT, De-Cat, Seat Hack & PCV
T Bars, Dart Screen, LongHaul & Back Rest/Rear Rack
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| | | RedBird2010 | | Chaac | |  | | Reg. Date | : | 11/10/2010 | | Posts | : | 666 | | Location | : | Spokane Valley, Washington, United States |
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| | Posted : 12 Nov 2012 - 00:11 Post title : Re: High Octane Fuel and Mapping (Re: TarkMalbot) | | |
TarkMalbot wrote:
Copied from Wikipedia whilst doing my research:
Anti-Knock Index (AKI)
In most countries, including Australia and all of those in Europe, the "headline" octane rating shown on the pump is the RON, but in Canada, the United States and some other countries, like Brazil, the headline number is the average of the RON and the MON, called the Anti-Knock Index (AKI, and often written on pumps as (R+M)/2). It may also sometimes be called the Pump Octane Number (PON).
Difference between RON and AKI
Because of the 8 to 10 point difference noted above, the octane rating shown in Canada and the United States is 4 to 5 points lower than the rating shown elsewhere in the world for the same fuel. See the table in the following section for a comparison.
Observed Road Octane Number (RdON)
The final type of octane rating, called Observed Road Octane Number (RdON), is derived from testing gasolines in real world multi-cylinder engines, normally at wide open throttle. It was developed in the 1920s and is still reliable today. The original testing was done in cars on the road but as technology developed the testing was moved to chassis dynamometers with environmental controls to improve consistency.
So the 99 RON fuel I use is equivalent to 87 MON and 94 AKI.
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| Rick 
2010 Thunderbird SE 1600
"Harley-Davidson; the worlds' most efficient method of turning gasoline into noise without the harmful side effect of horsepower."
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| | | rabbi | | Chaac | |  | | Reg. Date | : | 28/02/2012 | | Posts | : | 926 | | Location | : | Geelong, Victoria, Australia |
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| | Posted : 12 Nov 2012 - 02:38 Post title : Re: High Octane Fuel and Mapping (Re: TarkMalbot) | | | OK Triumph says to use unleaded 91 RON or US-87RON/MON in the good book, where does Aussie BP Ultimate Premium unleaded 98 fit in the equation?
I read somewhere here that some fella's are using 95 due to the soot build up using 98 ???
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| | | daz | | Zeus | |  | | Reg. Date | : | 12/05/2009 | | Posts | : | 7,709 | | Location | : | United States |
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| | Posted : 12 Nov 2012 - 02:53 Post title : Re: High Octane Fuel and Mapping (Re: rabbi) | | | Triumph says a "minimum" of US 87, which means 87 or higher. They don't tell you which is best. I can tell you tho w/o a doubt that like many others have found, mine runs noticeably stronger on mid grade. I've never owned another vehicle that ran better on anything above the recommended minimum, so i don't know whats going on. But that was true even before i did any mods. Now with tors and decat and the tune i'm running i assume it probably has to be a higher minimum considering the timing is advanced over any stock triumph tune.
| 2010 Blue/White Thunderbird, "Brutus". 1700 kit, short tors, gutted cat, UNI filter, filter seal off, custom tune. Brutus in his native habitat: Link
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| | | Leethal | | Zeus | |  | | Reg. Date | : | 24/01/2011 | | Posts | : | 6,515 | | Location | : | Australia |
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| | Posted : 12 Nov 2012 - 07:08 Post title : Re: High Octane Fuel and Mapping (Re: rabbi) | | |
rabbi wrote:
OK Triumph says to use unleaded 91 RON or US-87RON/MON in the good book, where does Aussie BP Ultimate Premium unleaded 98 fit in the equation?
I read somewhere here that some fella's are using 95 due to the soot build up using 98 ???
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I've always used 95, I will use 91 if I have to when travelling because some brands don't have 95 but have always found my engine pings on 91 under acceleration. Used 98 only a couple of times and couldn't feel any benefit. I do get some sooting at the end of my tors.
1600/TORS/ free flow filter.
| Experience is something you get just after you needed it 
1600,Foran Razorbacks, Meerkat bypass, Dyno tune, real headlight,plenty of chrome,switchblade pegs, Nitron R3 shocks & Ikon progressive fork springs etc. Scorpion Western Low handlebars. PH adjustable fork caps.
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| | | Dougl | | Chaac | |  | | Reg. Date | : | 13/07/2012 | | Posts | : | 544 | | Location | : | Reno, Nevada, United States |
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| | Posted : 13 Nov 2012 - 05:38 Post title : Re: High Octane Fuel and Mapping (Re: Leethal) | | | When I bought my R3 in 2004 I'm pretty sure my dealer said to use 87 (US). It ran great for 8 years. When I bought the Bird in June, his brother who is also the chief mechanic, said they recommend premium. They both have a history in Pro Stock and the mechanic does a lot of performance V-twin work - they've developed their own kits. I'm using premium.
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| | | intimidator32 | | Chaac | |  | | Reg. Date | : | 12/05/2012 | | Posts | : | 913 | | Location | : | lexington, ky, United States |
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| | Posted : 13 Nov 2012 - 12:24 Post title : Re: High Octane Fuel and Mapping (Re: Dougl) | | | i use premium also, its only a couple bucks more per fill-up and i did notice a little more chatter from the motor the couple times i used 87 octane.
| currently on a slow Harley but will have another Triumph eventually 
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| | | Reever | | Set | |  | | Reg. Date | : | 07/11/2010 | | Posts | : | 47 | | Location | : | Brisbane, Australia |
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| | Posted : 13 Nov 2012 - 12:50 Post title : Re: High Octane Fuel and Mapping (Re: intimidator32) | | | I will usually try and run 95. I avoid BP fuel most of the time as in Brisbane a lot of the BP servo have ethanol added. The thing with 98 here is that not many people use it so there is no guarantee it still has full octane especially with the price of fuel in Brisbane.
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