Race fuel

I've considered it but my only issue with running race gas is that you have to drain the tank after each use. After a long track day the last thing I want to worry about is draining the tank. Other than that I as I understand it there is about a 5hp gain to be had over pump gas, but that's just not worth the extra hassle to me.

smokey11 said:

I've considered it but my only issue with running race gas is that you have to drain the tank after each use. After a long track day the last thing I want to worry about is draining the tank. Other than that I as I understand it there is about a 5hp gain to be had over pump gas, but that's just not worth the extra hassle to me.

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Explain that please? Why would you have to drain your gas after?

Cant you just mix/fill it up with 93 after and its just a higher mix of octane? Sorry if this sounds ignorant... :O

Unless your talking about if your bike is tuned for 100 only then obviously you have to stick with it...but still...why drain it?

Some race fuels additives will clog your injectors if left to spoil in your tank. Meaning the fuel evaporates off... leaving the additive behind.

Some will attract moisture as well.

This would mostly be with your higher end leaded fuels you buy in a can.

Not so much with something you buy out of a pump.


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Backmarker said:

Some race fuels additives will clog your injectors if left to spoil in your tank. Meaning the fuel evaporates off... leaving the additive.

Some will attract moisture as well.

This would mostly be with your higher end leaded fuels you buy in a can.

Not so much with something you buy out of a pump.


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ahhhhh.....thanks for the clarification bud :bigthumb:

If I were to fill er up on 100 octane (pump) and then use it with 93 after as a DD im assuming it would not cause any issues...as long as it doesn't sit after racing?

Then again...I have no reason to waste money on 100octane when my bike is not tuned for it....extra money for nothing IMO

Most likely no need to drain 100 unleaded pump fuel.

And true... if your not tuned for it....and your not out riding your machines potential... why spend the money.

Ride Harder ! :bounce:


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The only benefit there is from race gas is if your bike is mapped for it and you need that extra power on race day.

Other than that, there's no point unless you like the white tip and the smell of it. :lol:

using race fuel on a track day? you'll be "that guy"

Ive built some high compression atvmx motors and the only fuel I've seen gum up was the VP oxygenated fuel like u4 and mr12, something like c12 I've left in a tank all winter with no problems. I've also heard the oxygenated stuff can eat rubber if in contact too long. And as far as no real need for it, tear a motor apart on pump gas and then compare to a motor running leaded fuel and try and say the same. Race fuel burns much cleaner and more efficiently.-Steven

I am with everyone else. Race fuel should be the absolute last thing you are looking to do on a bike. Not to mention that unless you are tuned to run on it you won't realize any performance increase.

Spend your money on seat time or suspension upgrades =)

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I ran VP c10 two years ago cut half and half with pump gas in a completely stock bike. Last year I ran pump gas only with a full exhaust and Bazzaz. I ran pretty much same times both years. mr12 will give you more hp but it needs to be drained after your race as mentioned above. More trouble than it's worth I think.

I thought the purpose of high octane was to keep high compression motors cooler and it was a myth that you get more power from higher octane.:O

RRnold said:

unless you like the white tip and the smell of it.

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:yumyum: I do love that smell in the morning!

Backmarker said:

Unless your running for a podium finish.... why ?

If you want to be faster on the track... carry more corner speed.

Get that drive out of the last turn onto the straight.

Don't use your brakes until you see god, and then brake like hell is coming.

Spend your money on seat time learning...

Get your bike set up to handle better....

Buy more track time.....

Fuel is the last resort to going faster !!!


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I was fighting for 2 championships last season and still ran pump gas. There is more time for me to make up under braking than U4 wil get me under acceleration!

Backmarker said:

Unless your running for a podium finish.... why ?

If you want to be faster on the track... carry more corner speed.

Get that drive out of the last turn onto the straight.

Don't use your brakes until you see god, and then brake like hell is coming.

Spend your money on seat time learning...

Get your bike set up to handle better....

Buy more track time.....

Fuel is the last resort to going faster !!!


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I agree with everything here 100%!!

let me clear things up a little bit. I am absolutely not doing this for performace increase, and think its a waste unless youre fighting for a podium, have a built motor ect...

But I was thinking about doing it more for the consistent fuel quality, and clean burn. was looking more into VP T4 instead of the more powerful blends. the extra hp is just a plus

I also have access to a dynojet with current load and everything that i can use whenever i need to so tuning for the gas is no problem. I was actually thinking about playing around with my ignition timing just a little bit and do some test pulls on the dyno and see what i can come up with as i understand race gas makes it easier to tune for ignition advancements.

have any of you guys played with ignition timing on any of your race bikes?

lefu said:

using race fuel on a track day? you'll be "that guy"

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they sell it right at the track.. so i guess there will be a lot of "those guys"

i just tend to be a perfectionist, and dont mind spending the extra cash if my engine will be cleaner because of it...

Oldhead said:

I thought the purpose of high octane was to keep high compression motors cooler and it was a myth that you get more power from higher octane.:O

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That's true, but octane is not the part of race fuel that gives more power.

trackdayhero said:

That's true, but octane is not the part of race fuel that gives more power.

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hes right.
the answer is oxygenation

and also if tuned right these 600's make amazing power on an 87 octane oxygenated fuel. so its def not all about the octane

mcljm said:

they sell it right at the track.. so i guess there will be a lot of "those guys"

i just tend to be a perfectionist, and dont mind spending the extra cash if my engine will be cleaner because of it...

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They also sell 93 octane :O

It's a waste of money, plenty of people run ethanol blended fuels that are supposed to be terrible but we have guys on here with 40,000+ miles