Yes, I was refering to only by fuel specifications, I understand that the rest of the engine is what sets up where the power is made, This, among other things,would be what you are trying to match the fuel with. What do you mean by piston to stroke ratio? I am unfamiliar with that term.

 

<< What do you mean by piston to stroke ratio? I am unfamiliar with that term. >>



Piston size to stroke length ratio. Engines can be &quot;square&quot; = same bore size and stroke length. Under Square = Smaller Bore, longer stroke. Over Square = Bigger bore, shorter stroke.

Any of these combinations can get you the same displacement, but different power characteristics. A good example would be to look at the YZF426, and a Warrior.

The YZF has a bore size of about 100mm, with a very short stroke (and short rod). The Warrior has a bore size of 83mm, with a much longer stroke (proportionally). The Warrior is considered relatively &quot;square&quot;, the YZF is &quot;under square&quot;. Power is obviously delivered differently because of these characteristics.

Rod length also comes into play here - a short rod will produce power more quickly, a long rod will increase dwell time and generate better torque. Rod length has nothing to do with stroke length or displacement.

 

Ok, Yes I understand that now, I just didnt recongnize the term you used..

 

elf oxygenates their fuel (puts lil tiny air bubbles in it) to make it mix with the air better on its way into the engine, (pouring in horsepower) if u run the same jetting as for regular race gas you will lean the motor out. so be ready for a lot of jetting changes for altitude, humidity, air temp etc...