Energy Information Administration EIA Im guessing US 87 is about the same as R 91 in most cases but because of a lot of variables there is no direct conversion. Pre-ignition will cause your Harley engine to knock leading to further damage.
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Motorcycles are considered to have high compression engines which is something that requires high octane.
Is high octane gas better for a motorcycle. Should You Run Premium Gas In Your Motorcycle. He says the energy content of fuel is the same no matter what octane rating it has. A higher octane rating on gasoline does not mean it a better gas as all fuel these days have comparable chemicals added for the altitude and climate by each geographical region.
In most cases no. Its an easy connection to make given all the high octane cafes high octane CrossFit gyms and other brands and products that use the high octane label to convey potency. High octane gas alone does not yield more power unless its preventing detonation.
This fuel is better suited for High compression engines which can properly compress the higher octane sufficiently and with the low detnotation ignite them when required. A higher octane gas will net more horsepower get better mileage or offer better thrall response. Thats not considered high compression.
I also know that some Harley riders Dodsfall especially will use a higher octane in the summer to prevent predetonation since Harleys are air-cooled and run a bit hotter. Every brand and model motorcycle made has the suggested octane rating for that bike they differ by not only the brand of bike but different models of the same brand have difference octane. Good to have for those situations.
A higher compression ratio engine which is generally featured in the modern sportbikes require high octane fuel for efficient combustion and maximum power output. If a racers engine is detonating on 92 octane gasoline using a higher-octane quality fuel is definitely a plus. Carbon can make it run bad but higher octane can counter that effect which would explain why Mikes 1990 runs better with Premium.
Will knocking harm my engine. Httpsrvzla2SIgqicWhats the best gas for your. That being said if Im in a jam because some small towns only have regular 87 octane I carry some bottles of AMSOIL Octane boost in my saddlebag.
Simply put Higher octane is better for performance motors as it requires higher compression before spontaneously combustion. If your owners manual calls for a. When it comes to the octane number many people think its an indication of the gasolines power density and that a higher octane gas will net more horsepower get better mileage or offer better throttle response.
You want combustion to occur at the cylinders high point where its stroke is maximum. Higher octane does not necessarily mean more power. The short answer to this question is a simple No Modern motorcycle engines are designed to run just fine using gasoline with a higher octane than recommended.
As Frostbitevinnie states low detnotation is a fact in higher octane fuel. It helps in the efficient Break-In run-in running in the first 2000km. Harley -Davidson recommends that riders should use 92 octane fuel or higher.
Lower octane may combust early reducing the engines output and causing the pinging sound heard. People think the new motorcycle should use petrol lower RON and older should use octane higher RON. Using a premium fuel with a higher octane than specified by the motorcycle manufacturer will not improve engine power or economy RACQ technical officer Steve Spalding advises.
Most Harley motorcycles can use 110 octane fuel. Ive had friends say My bike runs better on high octane But is that really true. I discuss whether high octane fuel is better for your motorcycle or not.
It is the compression Ratio of the engine which determines the Octane Rating of the fuel depending upon the Compression ratio of the engine the fuel required could be high or low octane. Gasoline explained - octane in depth - US. R usually yields higher numbers than M.
Ive run 89 in my Vaquero several times and I dont get pre-ignition but the engine seems to run a little rough coarse is how I usually describe it and I get lower gas mileage. However if you put 110 octane in your Harley it will not run faster and you can damage it if the motorcycle is not properly tuned to run 110 octane fuel. One bottle will bump you 3 points in octane on a tank of fuel.
The general rule is if youre not pinging you dont need it. Gasoline ratings are research method averaged with motor octane which is why US pumps usually display RM2. If you experience a light knocking sound from time to time theres usually no need to worry.
Some sportbikes require a higher octane due to their high compression ratio. The general rule is that compression ratios of 121 and higher require high octane fuels. Octane Explained The Shop ManualRead more about gasoline.
Does higher-octane gas clean engines better. This is also a misconception. If you have an older vehicle car bike or whatever higher octane may improve performance because older engines especially carbureted or high mileage engines tend to have carbon buildup.
Ethanol is an additive in gas that is used to boost the octane but it can eventually clog up motorcycle carburetors. Even if that sounds drastic if my manual says 90 or higher I wont run anything less. G Guitarosaur Registered Joined Jun 19 2008 604 Posts 12 Aug 12 2008.
But it is good to use better RON gasoline for the new bike engine. If your engine is detonation-free on 92 octane gasoline the benefit of using a higher octane product is limited to the distillation characteristics discussed earlier. The kind of gas motorcycles should use is ethanol-free higher octane gasoline no less than a 91 rating.
The only reason why your Harley bike needs premium fuel is that its design makes it susceptible to pre-ignition. In other words all levels of gas and all brands carry similar cleaning agents. If you ever question fuel qualityalways lean towards a higher octane fuelas it is always safer to have more octane than not enoughbut running more than what is necessary for the particular application is often wasting money and a few ponies.
The EPA mandates that all gas no matter the octane level or brand add cleaning agents. High-octane premium fuel prevents pre-ignition from happening and thats the only benefit it has for your bike.
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