I currently run Sunoco Supreme, 112, race fuel. Would like to try ELF. Anyone else run ELF? What do you think of it. I am in central PA, and any info where to pick up some would be appreciated.

Thanks
KaTos

 

i dont live in pa. but i just git mine from our local dragstrip they have 110 and 112

 

A friend of mine runs VP in his RM 250's. He has is running at like 13:1 compression! It works good but since he races he has to rebuild the top end after everyrace.

 

If you want to run elf, be prepared to do some VERY CAREFUL jetting. The fuel is much more volatile than regular race fuel (which is why the pros use it, more power for the same octane).

The manufacturer of ELF fuels is Nutec, try them at www.nutec.com

In dyno testing, we found about a 3% gain over regular fuels in ALL engines using the Nutec/ELF fuel. This is with proper jetting.

Like i said, it's volatile stuff, treat it with respect.

 

Volatility has nothing to do with the power available from a fuel, It is much more closely related to acceleration factor than to available power.

 

There are additives in the ELF/Nutec fuel which are MORE VOLATILE, I am using the true definition of the term here, meaning "vaporizing or evaporating quickly"

I didn't want to get into a big technical discussion, so I left it with a basic description of the fuel, and what to watch out for.

If you want to discuss the merits of the "volatility" of Nutec fuels, give them a call, or e-mail me. We've been dyno testing with the product for about 5 weeks now.

 

Yes you are correct that it will be hard to jet the fuel, I am not disagreeing with you (either from agreeing with, or lack of knowledge about the fuel and its specifications) in any way other than the fact that volatility is not the amount of power in a fuel. Heat (BTU) is the power released from a fuel, and thus it is what causes the power in an engine.

 

<< Heat (BTU) is the power released from a fuel, and thus it is what causes the power in an engine. >>



Yes, but you can have lighter elements, which ignite more quickly, and heavier stuff which produces the same amount of BTU's, but does not produce power as quickly -- basically, you chose between a long, slow burn or a quick fast one. Same BTU's, different power delivery.

Matching the fuel and its components to the type of power you need is a science unto itself. Pro M/X teams have a specific person from the fuel company whom they have on salary just to make sure the fuel the rider is using matches his riding style and the engine components. Even if the team has two identically spec'd 250 bikes, they will probably run a different fuel &quot;recipe&quot; for each rider.

Because of AMA rules - the octane of each of these fuels will be EXACTLY the same, or slightly less than the AMA max. Each of them will deliver power differently though, depending on the percentage of lighter elements and other additives.

We have been lucky to test a few of these fuels on the dyno. I was astonished at the differences between two fuels with exactly the same octane rating and completely different power characteristics. Way cool stuff.

 

Wouldnt this affect more where the power comes on strongest in the engine? I completely understand how the fuel and motor have to be tuned\matched together. Fuel is definatly one of the most important parts on an IC engine.

 

<< Wouldnt this affect more where the power comes on strongest in the engine? >>



No, that is mainly determined by the camshaft, pipe, piston to stroke ratio and rod length on a four stroke. It's determined by pipe volume, taper, diameter and length and also piston to stroke ratio and rod length on a two stroke.