Premium or Regualr?
THEY LIKE REGULAR JUST FINE :thumbsup
YAY! :5moped
Hmmm
My 1100s is like chalk and cheese with fuel put the stock crap stuff and it's not great put 98 and it's a different bike,I've never been able to tell much difference between the two on my Tiger,but 2 years ago on the way to Mugello we were in Aosta in the alps and stopped at a fuel station that was selling 110 octane it cost a fortune and it turned the old tiger into an absolute missile I was crying when it had all gone,but still smile at the thought of the German on his GS who got smoked by a Brit on a 955 :icon_wink:
Quote from: Chris Canning on August 18, 2014, 11:21:15 PM
still smile at the thought of the German on his GS who got smoked by a Brit on a 955 :icon_wink:
:ImaPoser
:icon_confused:
I really hate to burst anyone's bubble here, but... well... Octane rating has absolutely no influence on the amount of energy stored in fuel.
The one and ONLY thing the octane rating indicates is the temperature and pressure level a fuel will require before self ignition.
The higher the compression rating of an engine, the higher the octane rating has to be to prevent detonation and engine damage (pinging).
The reason why octane is associated with high performance is because sports car engines usually have higher compression ratios, therefore require higher octane fuel.
Higher octane will ONLY deliver better performance, compared to low octane fuel, if used in a high compression engine that requires it in the first place. If an engine is designed for lower octane fuel, high octane fuel makes absolutely no difference, none, nada, ziltch, nothing.
:augie
Actually high octane fuel can make huge differences in performance if the vehicle has the capability to adjust the timing to take advantage of more advanced timing possible with the higher octane fuel.
In that case, tests show that you get at best a .5% to 1% increase in HP, and 0.05% increase in mileage.
I guess 1% wouldn't be considered huge
Here have some science...
http://www.scientificamerican.com/article/fact-or-fiction-premium-g/ (http://www.scientificamerican.com/article/fact-or-fiction-premium-g/)
FWIW I still think premium fuel makes some engines run better and have more 'pep'.
Quote from: rex007can on August 19, 2014, 03:32:47 PM
:icon_confused:
I really hate to burst anyone's bubble here, but... well... Octane rating has absolutely no influence on the amount of energy stored in fuel.
The one and ONLY thing the octane rating indicates is the temperature and pressure level a fuel will require before self ignition.
The higher the compression rating of an engine, the higher the octane rating has to be to prevent detonation and engine damage (pinging).
The reason why octane is associated with high performance is because sports car engines usually have higher compression ratios, therefore require higher octane fuel.
Higher octane will ONLY deliver better performance, compared to low octane fuel, if used in a high compression engine that requires it in the first place. If an engine is designed for lower octane fuel, high octane fuel makes absolutely no difference, none, nada, ziltch, nothing.
:augie
Made me chuckle this the days of fitting high compression pistons are long gone because they all have them now!! and hence why you get the advantage with good fuel, about the only low compression four stroke I've come across is my lawn mower.
Sports car engines petrol!!! apart from you hyper cars most are turbo diesel.
The above post would have stood up 30/40 years ago but the game has changed in the 21st century fuel and engine maps are what produces HP.
Of course if you don't believe me try a tank of Avgas :icon_wink: which is what I had in Italy.
We use petrol and avgas 50/50 in the race bikes, it gives them a hurry up by allowing higher revs and compression. The science says there should be no difference in a normal engine, but if that engine has a knock sensor, then the ECU will get every last once of energy it can out of each piston stroke by advancing the timing as far as it can without detonation occurring. Sadly, Tigers don't have knock sensors. So, in theory, you won't see any advantage. I ran my Tiger on 98RON in France just to see if I could tell, but other than a bit smoother - not really.
Racing fuel is indeed different, but not because of the octane rating. It usually contains more chemical energy per volume than regular gas, therefore more power.
Well, ours comes 50 % from the garage forecourt and 50 % from the local airfield - no bespoke race fuel at all.....
You run 50% kerosene??
:ImaPoser Kerosene, or paraffin over here, is AVTUR, AVGAS is high octane petrol
midgrade fuel. 89 or 88 octane.
Quote from: Bixxer Bob on August 21, 2014, 11:40:38 PM
:ImaPoser Kerosene, or paraffin over here, is AVTUR, AVGAS is high octane petrol
I know... I was thinking Jet fuel in a Triumph.
:icon_mrgreen:
Quote from: rex007can on August 22, 2014, 08:42:28 PM
Quote from: Bixxer Bob on August 21, 2014, 11:40:38 PM
:ImaPoser Kerosene, or paraffin over here, is AVTUR, AVGAS is high octane petrol
I know... I was thinking Jet fuel in a Triumph.
:icon_mrgreen:
:thumbsup
All we use the Tiger for is long distance it remarkable the difference between tanks of fuel in how the bike runs never mind Avgas.
:nod
A friend that runs a full fuel dragster keeps telling me I should try a little nitro-methane. Says it will go a long way. Runs 10 gallons on fuel in about 6 seconds. That is about what my bike runs 40 gpm, wait my bike runs about 45 mpg.
NO MATTER what forum im on, This will always start a heated debate! Sorry Guys! :icon_redface:
Heated!!! :icon_scratch:
Quote from: Chris Canning on August 26, 2014, 06:40:55 PM
Heated!!! :icon_scratch:
May be heated is a bad choice of words. But it seems to start a debate usually.
I don't see any heat, this is average Tigertriple banter :icon_razz:
:iagree
Quote from: sailorcolin on August 26, 2014, 07:22:42 PM
May be heated is a bad choice of words. But it seems to start a debate usually.
We don't need much encouragement, just don't take anything too seriously :tin hat
Rex. One question.
What do you consider high compression.
my two peneth worth
I put super unleaded when I can afford it and normal when I cant, she definatly runs smoother on super without a doupt.
Quote from: brad1098 on September 12, 2014, 02:24:07 PM
Rex. One question.
What do you consider high compression.
Normal engine. ~9:1
"Performance" engine at least 10:1
High performance engine 11+:1 (for cars)
Motorcycles, I guess from having to squeeze more poqer out of small displacement engines, usually use higher compression ratios than average cars, although most fat V-Twins will run what? About 9.5:1?
With gasoline, on average, 9:1 will work with 87 Octane, 10:1 should go up to 90-91 , and 11,12:1 should use 92 to 94 octane.
Above that would be race engine, which dont usually use regular fuel you can get at the pump.
That's also not counting Diesel which can get a much higher compression ratio.
there are also other factors such as combustion chamber shape and design, cooling, timing, valves etc that can influence the octane required vs compression ratio so it's not absolute.
Why do you ask?
Never seen fuel over here as low as 94 and it's why I've always been told never to buy a US spec Power Commander because you we don't use that e'rrr paraffin and they are set up completely differently,blimey we even get two specs in diesel.
I ask to see if your thoughts were on par with mine.
955 Tiger is 11.5:1 and I always run premium.
Quote from: brad1098 on September 14, 2014, 05:18:08 AM
I ask to see if your thoughts were on par with mine.
955 Tiger is 11.5:1 and I always run premium.
I always use premium too.
94 if I can get it (only one chain sells it)