98 octane fuel
Cruiser
Joined: Sep 2006
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From:
RE: 98 octane fuel
Here in the States, we don't have 98 octane available. Our premium fuel is between 92 and 94. I would guess that 98 would have a slower burn rate, whichwould create lower combustion temperatures.
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Joined: Aug 2007
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From: Spain
RE: 98 octane fuel
http://auto.howstuffworks.com/question90.htm
So, basically, a 96 cubic inches motor,giving 65 horses don't need that high octaned fuel, a vrod, with 1200cc and 115 horses needs it.
cheers!
The octane rating of gasoline tells you how much the fuel can be compressed before it spontaneously ignites. When gas ignites by compression rather than because of the spark from the spark plug, it causes knocking in the engine. Knocking can damage an engine, so it is not something you want to have happening. Lower-octane gas (like "regular" 87-octane gasoline) can handle the least amount of compression before igniting.
a "high-performance engine" has a higher compression ratio and requires higher-octane fuel. The advantage of a high compression ratio is that it gives your engine a higher horsepower rating for a given engine weight -- that is what makes the engine "high performance." The disadvantage is that the gasoline for your engine costs more.
cheers!
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From: Spain
RE: 98 octane fuel
ORIGINAL: Wyde Glyde Bry
warper,
Should I interpret that to mean I should not be using 92/93 octane fuel in my '07 Wide Glide and that it should in theory run better on regular instead of premium?
warper,
Should I interpret that to mean I should not be using 92/93 octane fuel in my '07 Wide Glide and that it should in theory run better on regular instead of premium?
In any case, in europe we have 95 (which is 93-95 per lab test) and 98, so I cannot tell how the engine runs on 92-93.
I can tell you that from the ol' days of fuel with 90oct and pb my dad's car run terribly bad with 90oct/pb and good with 95/no pb. And no noise with 98/no pb.
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Elite HDF Member
Joined: Nov 2006
Posts: 3,909
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From: Livingston, Texas
RE: 98 octane fuel
ORIGINAL: badbs101
Higher octane = lower temps
Drexor has his facts backwards.
Higher octane = lower temps
Drexor has his facts backwards.
Realize yer sitton on top of a air cooled engine also.
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Joined: Aug 2007
Posts: 65
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From: Spain
RE: 98 octane fuel
actually the temp thing has to do with the fact that higher octane has higher energy, as the engine is running at small compression most of the energy is lost in the form of heat. Changing pipes for ones giving better performance will allow more of the energy generated on the explosion to be turned into movement rather than into heat.
Elite HDF Member
Joined: Nov 2006
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From: Livingston, Texas
RE: 98 octane fuel
ORIGINAL: warper
actually the temp thing has to do with the fact that higher octane has higher energy, as the engine is running at small compression most of the energy is lost in the form of heat. Changing pipes for ones giving better performance will allow more of the energy generated on the explosion to be turned into movement rather than into heat.
actually the temp thing has to do with the fact that higher octane has higher energy, as the engine is running at small compression most of the energy is lost in the form of heat. Changing pipes for ones giving better performance will allow more of the energy generated on the explosion to be turned into movement rather than into heat.