Yes, I took today off and have been busy! I just stopped by to see a friend who has a lot of street bike racing experience (mechanic for Honda) and also makes pipes, among other things. He mentioned MR1 motorcycle racing fuel. The added it to an otherwise stock Something or other 750 and picked up 12 hp at the rear wheel! It went from 126 to 138. No tuning of other changes made to this stock bike. All they did was tank swap, drain the lines and bowl, then made another pull. Slam, 12 HP.
Yes, this stuff it like $13 a gallon, but it looks like I'll be getting some to test so no one needs to waste the dough. I figure it might yield 3 hp on a 500 Scrambler. While I won't be dynoing this belt driven machine, I'll let you know the seat of the pants answer once in a few days, once I can get out to ride.
Why do I do this? I tinker with everything until there's nothing left to be done. [img]i/expressions/face-icon-small-cool.gif[/img]

 

Oh, and look at what this guy Crandall says about it.

Talking about MR1

 

Great info! Don't think I'll use it for trail blasting lol. Mpls is lucky enough with $2.91/gal 110 octane. Would be fun for some weekend drags though. Please post the results.

Ken

 

Isn't that kinda like renting horsepower? Thanks for the info, keep us updated on how it goes.[img]i/expressions/face-icon-small-wink.gif[/img]

 

I'm getting at employee rates from a hookup. $6 a gallon. I can run that. Shoot, maybe burn 5-6 gallons a month. He should be getting me a can of it this weekend.

 

Be careful with hi octane gasoline. Octane controls how fast the fuel burns. For example, if you ignite the fuel in a combustion chamber at one end using a low octane gasoline, the flame will travle across the chamber faster than if you were burning a high octane gasoline. The higher the octane, the slower it burns. With the fuel burning slower, you can advance the timing and the expansion of combustion (fuel burning, or "flame front propogation&quot will burn longer pushing the piston further down the power stroke, thus more power. If you cannot control timing you take the chance of combution still occuring when the exhaust valve opens, and you have burnt valve(s).
Thats what happens. Also the engine will develope more heat because the fuel is burning for a longer period of time.

This may take a while depending on fuel and other conditions, but I will continue to run the octane recommended by the manufacture.

Have fun,
[img]i/expressions/face-icon-small-happy.gif[/img]

 

It's 92 octane with some good stuff in it. [img]i/expressions/face-icon-small-wink.gif[/img]