I know this sounds like a dumb question but a friend of mine said that when he got his 05 that the dealer told him not to run 100 octane in his bike, only 92 max. Sounds like crap to me but i thought it could have someting to do with the fuel maping on the stock computer. that dosent seem to make any sence though because if octain made any diffrence the wouldnt dynojet list the octain grade as factor in the maps like other mods??? Any thoughts here??? BTW we both have cat removed, pcIII slips and stacks.
smoking1
Those mods will not really change the octane rating needed. If you mill the head or change the compression in some way you will need higher octane. Any performance increase from running 100 octane is in your head.
Do a search on octane on this board. There were some good discussions explaining the principle of adding octane to gas. It is only to keep the engine from pre-detonation or something to that effect.
Do a search on octane on this board. There were some good discussions explaining the principle of adding octane to gas. It is only to keep the engine from pre-detonation or something to that effect.
It is in your head. Fuel with a higher octane level will withstand higher pressure to the AF mixture without exploding. Sometimes it is not in your head as higher octane blends will also have more adititives that could keep your engine cleaner.
I personally use 95 octane and I add a can of injector cleaners every now and then.
I personally use 95 octane and I add a can of injector cleaners every now and then.
Octane ratings in pump gas only indicate one thing, that is the ability of the fuel to resist pre-ignition. Octane ratings have nothing to do with the burn rate or “power” of the fuel.
Premium fuels, such as race fuels, however, have been shown to increase power.
JAYSTENSEC4CYL, feel free to jump in here.
Premium fuels, such as race fuels, however, have been shown to increase power.
JAYSTENSEC4CYL, feel free to jump in here.
Simple...higher octane...resists detonation. That is all. So...how this works is, that little knocking you get from running really low octane gas in a vehical...that's called predetonation. The gas is igniting from the compression of the pistons before the spark is lighting the fuel. To stop this, you put in a higher octane fuel. A "stock" bike, IE: not changing compression ratings, milling heads, etc will NEVER requre anything higher than 91/93 octane. Note also this is at sea level. If you are in Denver Co for instance, 89 will be just fine, the altitude changes the ignition points of fuel. Now what's funny is this...if you add a higher octane fuel to a bike that doesn' tneed it, you mileage will go down and your performance will decrease. Reasoning...the fuel is acutally harder to burn. Hence the reason it resists pre-detonation. What you want to do is run the lowest possible octane before your motor "knocks". That's it. Now..under stress...the bike is at the track or something, pre-detonation will occur much easier. I know people that run 89 or even 87 on the street, but when they hit the track, the motor will knock, so they put in 93.
100 octane is just lining the pockets of the company you are buying it from...does nothign for you.
100 octane is just lining the pockets of the company you are buying it from...does nothign for you.
DO A SEARCH, THIS HAS BEEN BEAT TO DEATH.
You want to run the LOWEST PUMP OCTANE thats does not knock or ping. It's really that simple. More is not better.
Some race fuels do make more power in stock motors, but it has nothing to do with their octane, they are just better fuels and heat the air more efficiently.
It is very american to think more is better, but when dealing with PUMP gas octane ratings, more is not better. You will make the most power and produce the least deposits with the lowest octane that does not knock or ping.
More octane than you need at the pump will make less power, produce more deposits, and just flat waste money.
I have found here in Oklahoma that every stock motored sport bike I have tested will not knock or ping on 87 octane pump gas, and thats what I recommend to all my customers.
You want to run the LOWEST PUMP OCTANE thats does not knock or ping. It's really that simple. More is not better.
Some race fuels do make more power in stock motors, but it has nothing to do with their octane, they are just better fuels and heat the air more efficiently.
It is very american to think more is better, but when dealing with PUMP gas octane ratings, more is not better. You will make the most power and produce the least deposits with the lowest octane that does not knock or ping.
More octane than you need at the pump will make less power, produce more deposits, and just flat waste money.
I have found here in Oklahoma that every stock motored sport bike I have tested will not knock or ping on 87 octane pump gas, and thats what I recommend to all my customers.
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
