Waste of money on a stock bike, but the exhaust does smell pretty good.

 

Costs 3 times as much and lasts half as long with no benefits= waste of money. But hey give a whirl and see what happens.

 

i used to run racing fuel in my ironhead. It loved it.

 

Clean what out?

 

Seems like an "Octane" thread occurs about once each month. No thanks to the oil companies that label it "Premium", "V-Power" and "Super" alluding to the possibility of more power. Great marketing ploys to empty the consumers wallet.

Along with a bunch of other scientific explanations, a simple one would be that the higher the octane, the slower the burn. High compression engines, or engines that have had the timing advanced dranmatically would tend to detonate (Preignite) if the octane rating were too low. Therefore, the higher octane blends contain admixtures that slow the burning process to allow for this higher compression or advance spark.

In a low or average compression motor, the burn of the high octane would be far too slow, resulting in LESS power overall.

That said, too many folks still want to believe that it makes yer bike go faster, so whatta ya gonna do?

Me? I'll spend the otherwise wasted money on something useful, like beer and women!


Bob

 

Higher octane fuel does not make more power. In fact it has less energy than lower octane fuel, so you may lose some power. What it does do is lessen the chance of detonation in the presence of other things advanced timing and higher compression, that do make more power. It also doesn't clean anything out, in fact it may cause more carbon to build up.

 

any of the ethanol that may be in the system

 

Like many said above, that high octane/race fuel is for high compression race motors and nothing but trouble and overkill for stock. A stock engine will run way hotter with it. Stay with the 91/93.

 

Since octane is just simply a number identifying a fuels resistance to ignition the higher the number the more that will go out the pipe unburned.

It is not a measure of power. BTU's is the measure of power in gas. All gas has 115,000 BTU's available. The compression, temperature, spark advance, atomization (sp) combustion chamber design, AFR and a variety of other factors determine how much power will come out of the power stroke. Many times a lower octane will yield more power and mpg.

 

Keep it under 100 oct unleaded if you do wanna play with a newer twin cam , no big difference in a stock machine honestly . Older big inch monsters like mine with 12-1 comp LOVES 98 - 102 on occasion , but does run a bit hotter I've noticed .