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anyone ever use race fuel?

  • Thread starter Thread starter ShirleySerious
  • Start date Start date
S

ShirleySerious

Guest
I was wondering if anyone's ever tried filling their bike up with race fuel. If you don't know what I mean, it's the 100+ octane stuff that costs almost twice what regular gas does. There's only two stations that I know of in a 50 mile radius that have it. I know it has lead in it and they say you can't use it in modern cars because of the catalytic converter, but since our bikes don't have one, would it be harmful or beneficial? I wasn't thinking of making a regular habit of filling up with it, just maybe once or twice.
 
I say this because we filled up my friend's single cylinder, naturally aspirated ATV with premium after having it run regular until that point. It was noticeably faster. Before you yell placebo effect, I wasn't told it was premium until after I rode it.
 
ShirleySerious said:
I say this because we filled up my friend's single cylinder, naturally aspirated ATV with premium after having it run regular until that point. It was noticeably faster. Before you yell placebo effect, I wasn't told it was premium until after I rode it.
Click to expand...

Placebo effect.

The only way the engine would be faster is if it was modified to take advantage of the higher octane (such as raising compression or advancing the ignition timing).
 
Most every weekend.

Weather conditions can play a big part on how much power a given engine will make. Look up SAE-J1349.

Only real way to know what gains (or losses) the fuel would have is to have a controlled way to measure it. SAE corrected dyno.

For a stock GS motor I don't see the point. They were designed for low grade fuel. Race type fuels could actually hurt the performance. There a many types of it. I learned the hard way that even fuels with the same specs made by two different companies do not always burn the same.

If you want more power, I suggest getting a bigger bike.
 
Nessism said:
Placebo effect.

The only way the engine would be faster is if it was modified to take advantage of the higher octane (such as raising compression or advancing the ignition timing).
Click to expand...

(in a Brooklyn accent)
You callin me a liar?
 
ill agree!

ill agree!

with ms.s. there ill put 94 oct.in my bike it will run better(and go through the gas faster) than regular petrol. faster? you bet you can feel it.thats just 94 vs.what 84(is that the norm or what ever is the norm.)
bye vrrrroooossssssshhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh


marz
 
i put some higher octane in my bike last week to drag race. it took about .5 seconds off my time.
 
Eli69 said:
i put some higher octane in my bike last week to drag race. it took about .5 seconds off my time.
Click to expand...

it was oxygenated then... otherwise i'll have to call BS

Higher octane fuel will actually slow down the burn and cause slower times..
 
In a stock motor designed for regular gas you mostly spend more money and dirty up your oil faster. That has been my experience thru 4 bikes...
 
Eli69 said:
i put some higher octane in my bike last week to drag race. it took about .5 seconds off my time.
Click to expand...

Using one of the billion on-line ET HP calculators that were based on car data to figure out some idea of what your claim is. Lets say your 1000cc L can run the 1/4 mile in 12.5 seconds flat. Say the bike with you and your gear weighs in at 650 lbs. Thats 65 HP. Say you put in that magic gas of yours and you ran a 12 second. Thats 75 HP or a gain of 10 HP or way more than 10%. That's huge!

The stuff most of the companies used was MTBE. Thanks EPA for looking out for us there.... Whole idea was to reduce emissions but I am guessing that the effects of MTBE will be with our kids kids kids.

Maybe I missed something, but adding Ethanol to gasoline is not increasing BTUs. Pure Methanol for example has far less BTUs/lb than pump gas. You can get more power out of it because it needs to burn at about 2X fuel air ratio of gasoline. The big reason to use it is not for this little gain in power but because the stuff is very stable. Ethanol is the same. Adding it to gasoline is going to lean things out. Newer engines can adjust for this, but older carb engines can't and they will run leaner.

When I was a teen in the 70's I remember reading a few articles about damage to snowmobiles from the additives. I even burned holes in a few of my own sled's pistons.

Leaner is quicker until she melts.... Maybe in your case you just need to jet it down a little and forget the fancy fuel....

http://www.epa.gov/otaq/regs/fuels/ostp-3.pdf


If you want more power, I suggest getting a bigger bike.
Oh, if you could only convince people of this.
Click to expand...
Yea, you have heard of a Horticulturists? There is an old saying...

"You can lead a Horticulturists but you can't make her think!"
 
Look, I'm not going to say it's for sure one way or the other.......

but a month ago I was getting smoked by Vespa's on my 450, and yesterday I tried some 93 octane and I blew the fairings off a turbo 'busa.

Not drawing any conclusions or anything, but yeah.....:-D
 
So what about Corn gas

So what about Corn gas

lecroy said:
When I was a teen in the 70's I remember reading a few articles about damage to snowmobiles from the additives. I even burned holes in a few of my own sled's pistons.
Click to expand...

Those old sleds were 2 strokes.

e85.png


There have been tests done on non-Flex Fuel vehicles to see if they can withstand the corrosive nature of E85 ethanol. Ron Fagen, President of Fagen Inc., an Ethanol plant design build firm in Grante Fall Minnesota, ran a non-Flex Fuel 2000 Chevy Tahoe 105,496 miles almost exclusively on E85. He donated the Tahoe to the Lake Area Technical Institute where it was dismantled and studied. They found that there were no adverse effects of E85 ethanol on the engine or the fuel system. In fact, they reported that the engine and fuel system were in better shape than some vehicles that ran gasoline with fewer miles. This video can be seen and verified at http://www.youtube.com/watch?v=HuOs1yap8mU
 
Had you said that these old sleds did not have an ECM to compensate for the lower grade fuels, I would have bought into it. 2 or 4 stroke does not matter. Lean is lean.

Thats the flaw with Fagan's test. Only one vehicle was tested (not a significant sample) and its new enough to have an ECM. Certainly not the case with these old GS's.
 
lecroy said:
Had you said that these old sleds did not have an ECM to compensate for the lower grade fuels, I would have bought into it. 2 or 4 stroke does not matter. Lean is lean.

Thats the flaw with Fagan's test. Only one vehicle was tested (not a significant sample) and its new enough to have an ECM. Certainly not the case with these old GS's.
Click to expand...


Im with ya. Thats just someones info Im sharing. Im not a big fan of running corn gas in my boat either (IO). The cylinders get washed and the rubber exhaust boot dont like alcohol.
 
Hi all, I did run some VP U-4E in my 1150 at one point and I had it on a dyno to see what the difference was between the VP gas and regular gas. It was a little over 6 Hp over regular gas. It did have to be rejetted because the fuel is oxygenated and the fuel is only about 92 octane. It absolutely ran perfectly after the right jetting. And the ignition timing was set at 36 degrees.
The Vp fuel was quite expensive and very smelly as well.
 
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