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not a bit, may even hinder you. You want to run the lowest octane fuel you can without the engine "pinging" The only exception to this oxygenated fuel which is it's own separate deal. Higher octane fuel would help if you had a higher compression or extremely advanced timing. Pretty much the higher the number the more resistance it has to burn. So say you advance you're timing a bunch and try to run 93 and your engine predetonate's or "pings". This is when you would step up to a higher octane fuel.
 

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In Florida
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Discussion Starter #3
i know about timing and compression ratios for running higher octane fuels in cars. the R6 has a high compression ratio of 12.8:1 i was thinking that if the actane was higher, maybe the the computer wouldn't sense knock and bump timing some, not sure if the motorcycle even has a knock module in it or not, it was just a thought, the guys at Yamaha said it would make a difference, but they are also trying to sell the fuel.

just wondering if anyone here has done it and did it make a difference?
 

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Raised on paint chips
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I run race fule in my race bikes. it does make a difference but unless you're running up front and the that little extra to stay on top of the competition, it's not really worth it. I'll run it in my street bikes too every once in a while just to help clean things out a little, but only when i'll be riding all day and filling the tank a time or two. if you do use race fuel, make sure you drain the tank when you're down and run the bike till you runout what's left in the fuel system. it's not good on your internal stuff to let the higher octane fuel sit in there for long periods of time.
 

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In Florida
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Discussion Starter #5
thanks man, best i heard yet, well, i was just going to run about 2 gallons of 111 or 113 octane, just to run a guy in a car, just wondering if it will help out any.
 

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r6less
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There are 0 performance gains from higher octane fuel and octane alone does NOT "clean things out", no matter what people tell you.

GO google it and find the real answers...
 

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In Florida
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Discussion Starter #9
it listed in the Race section, it's an Evo, he ran it at the track last night and got his best time so far, he ran a best of 7.2 and his best MPH was 100
 

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In Florida
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Discussion Starter #10
done 5 dyno's on the 636. three with vp race fuel, two without. 3hp increase with the vp.
so it did help alittle, not much to tell, but if i run the fuel and then take out the air filter, maybe it will be a few tenths quicker :jacked lol
 

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done 5 dyno's on the 636. three with vp race fuel, two without. 3hp increase with the vp.
Thats because all VP "race" fuel is oxygenated. And if you only saw 3hp, then something is wrong. U4.2 will give a stock bike around 5-6hp without a tune. 7-8hp with a tune.


If you run U4.2, your bike should pick up around 5hp. If its just 110 octane, non-oxygenated fuel, then its a waste of money.
 

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i'll post up the dyno runs when i get them scanned on the putter. the engines are a bit finicky. 138hp out of a 6er. it's tuned in for that.
not trying to argue though. just making sure that the dude gets the right info. higher octane fuel will burn cleaner, clean injectors and stuff, and add hp. that's all.
i'll try to get the dynos posted sunday.
 

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not trying to argue though. just making sure that the dude gets the right info. higher octane fuel will burn cleaner, clean injectors and stuff, and add hp. that's all.
i'll try to get the dynos posted sunday.
Higher octane fuel by itself will not add hp. burning cleaner and cleaning injectors depends on the detergent additives added to the fuel, not the octane. The only thing octane does is increase the resistance to knock, and allow you to run more timing in the motor or a higher compression ratio before you get detonation.

I'm not doubting that running VP gas gave you a few more horses, I totally believe that. What I don't agree with is that octane gave you those horses. Most VP gas used is oxygenated, which is where the power comes from. Octane and power have almost nothing directly in common with each other.
 

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VP U4.2 will give a noticeable difference in power and is the most widely used for motors that aren't heavily modified and don't run ridiculous compression ratios. Most places charge around $10-$14/gal for it. If you use this, make sure that you drain the tank and run the bike dry if its going to sit for a while(more than 2 or 3 days). If you ride the bike every day, then you should be fine burning down to like a 1/4 tank and just putting pump gas back in and running it.
 

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I Ran An Evo On The Fwy Dont Know What The Mods Are Just Saw An Exhaust And Heard A Blow Off I Took It Prety Easy And He Took Of Before Me
 

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I run race fule in my race bikes. it does make a difference but unless you're running up front and the that little extra to stay on top of the competition, it's not really worth it. I'll run it in my street bikes too every once in a while just to help clean things out a little, but only when i'll be riding all day and filling the tank a time or two. if you do use race fuel, make sure you drain the tank when you're down and run the bike till you runout what's left in the fuel system. it's not good on your internal stuff to let the higher octane fuel sit in there for long periods of time.
:321:321:321 **** OFF AND GO BACK TO YOUR GAY ASS FORUM :321
 
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