Pleas back up you answer with something besides false false false



it all has to do with compression ratio not guess ratio

someone call nicky hayden and tell him his gas octane level is too high he should be running 87




Can you “overoctane” an engine? If so, what happens?




High Octane fuel is required to avoid detonation when compression pressures are increased by either an increased compression ratio or better breathing. The narrow boiling range of BP 100 will ensure good mixture preparation because the heavier hydrocarbons of normal petrol are avoided. Also the lack of very low boiling temperature hydrocarbons will prevent hot fuel handling problems such as vapour lock

VP100 – Street Legal Power and Performance
VP100 (aka StreetBlaze 100) is a 100 octane unleaded gasoline
specifically engineered for high-performance street vehicles including
luxury sports cars, muscle cars, street rods, tuner cars, sportbikes,
cruisers and more. Oxygenated with ethanol, this CARBlegal fuel is
environmentally friendly and street legal throughout the U.S. It contains no
metal compounds and won’t harm catalytic converters or oxygen sensors.

More Oxygen = More Power
Oxygenated with ethanol, VP100 significantly outperforms premium grade unleaded
pump gas. In fact, dyno tests with a turbocharged application proved VP100 generates
up to 14% more horsepower compared to premium grade 91 octane unleaded gasoline.

ALSO:

VP-110™
Not your "standard" 110! Highest rated MON of any 110 fuel on the market. Formulated for use in naturally aspirated engines with CRs up to approximately 12:1-13:1. Good lower cost alternative.

however this is leaded and not street legal

compression raito of cbr 600 f4 12.1



My conclusion:

Yes it is fine to run 87, would i do it NO

Is your bike going to be super fast with higher octain NO

Is it a waist of money NO

Sportbikes have high performence motors, could you imagine if all car motors were built the same, tire sales would skyrocket...

Like stated in the first posts, your gonna get every answer known to man.

sportbikes are designed to make power "go fast" they are designed to run on pump gas, but there are benifits to higher octain fuel, expecially when oxygenated

 

It's fine to quote oil company ads but you've got flaws in your analogy. First, it isn't just about compression ratio. Ya, compression ratio is part of the equation but not the only factor. What kind of head (aluminum vs cast iron), how much airflow and timing advance are also just as important.

Even with 12:1 running anything over 94 in an F4 is not necessary. The engine is not tuned to need 100 or above. Seeing as higher octane is merely the resistance to detonation you will actually LOSE power by running fuel that will not completely burn.

I ran a turbo Busa @ 12 -15# for 36K miles on premium pump gas (did have water/alcohol injection ) and never had any issues with predetonation. It made 305HP at the wheel.

Now the question is will extra octane hurt anything? Nah. Run what makes you feel all tickelly inside. Running the 104 in an F4 will give you only slightly less power and unless you did back to back dyno runs you prolly wouldn't even notice it. The premium stuff at the pumps generally contain better detergents so they have the benefit of helping to keep your engine somewhat cleaner. I know QT has the same detergents in every grade so the extra .15 to .20 cents extra for premium would not make a difference.

If you decide to run your bike on a track for extended periods running 94 or even 100 would be good insurance against predetonation due to the heat these engines build up running high revs over long periods.

 

so your saying my 99 f4 is tuned to run the same gas as a geo metro??

I mainly ride twisties, I live in the purfect area for it, my normal rpm's are between 8 and 12.5, I simply do not trust 87, also it just does not get me as far

If i just cruised my bike 87 would be fine, but im not the average rider some are mild, this one is wild!!!

once again just for the record... if the manual says 87 is ok.....its ok

but I run premium in everything from my streetbikes to my lawn mower.

 

Actually no ... your bike should be tuned much better than a geo metro and therefore can use the same octane to better advantage. Most cars attempt at least a 14.7:1 AFR ... try that in a bike and you'll definitely fry your valves.

All I'm saying is high octane fuels have been marketed quite successfully by the oil companies. Most peeps think they need a higher octane than they really do. Add in that the manufacturers don't help in easing the confusion with their recommendations (in the U.S. we use predominantly the R+M/2 ... huge market why do the manufacturers use RON? ) and people just start thinking that more octane is better. If 93 is good then 104 is better. And 110 should make my vehicle achieve orbit, eh?

The truth is that higher octane fuels won't hurt your motor. But you are really pissing money away. If you are running a boosted motor (turbo or supercharger) then a higher octane fuel is essential. The same goes for aggressive cams and advanced ignition in high compression applications. And if you do track days with extended sessions and build up a lot of heat a tankful of 100 isn't a bad idea. But I seriously doubt that anything you can do on the street (unless you're riding like a dumbass) is gonna require the extra octane.

 

Here's one for you Chain.

The owner's manual specifically states the engine can handle oxyenated fuels with up to 10% Ethanol. Will the higher fuels have higher ethanol %s, possibly causing damage?

 

I guess to some it would be riding like a dumbass, but to me its all in good fun, I know the right and wrong places to do this, I dont go flying around town tacked out, but typically I am riding in the middle of nowhere in the twisties, might as well be a track as far as Im concerned. I however am not a line crosser, always stay in my lane.... no need to get into name calling, its just how I ride. I pay my own tickets, and do occasionally get them.

anyways, yes when you blow a motor, it pushes in more air, so you need a slower burning fuell.

This is why some higher octain fuels are oxygenated, provides more oxygen to the air fuel combustion mixture, I wouldnt want high oxygenated 87 octain.

also I take into account that a highflow filter is letting more 02 in.

Now I just wish that we could find a metal that could withstand running a pure oxygen intake, a bike that drew its air intake from a compressed oxygen tank!!!
then we could get craaaaaaaaaaaaaaaaazy power!!!!!!!!

of corse doing that would probably melt titanium like fire melts paper....... but its fun to dream!!

 

Kuro, the US EPA has a blend cap of 10% ethanol as of now.
Last I heard, they were considering raising it to 15%, but talk got delayed till later this year.

 

More air = more gas. The reason a blown motor needs higher octane is compressing air creates heat. That and it bumps the compression up a bit which also creates heat.

And was not calling you names. I don't know you, how you ride, or your skills. My only point was that it would be very difficult, in my opinion, to run a bike hard enough on the street to require the extra octane.

Kuro -- I have not researched the blended gas very much ... when I was running the hard stuff it wasn't a factor. What I have gleaned is the 10% ethanol blends have less energy than the same amount of 100% gas. Which is why your miles per gallon suffers. The stoichiometric combustion ratio for alcohol is different than for gas so to run better than 10% could lean out your AFR and cause problems. I do know this, if you take the same ethanol and run it through an aquamist and inject it directly into the cylinder it'll cool the charge and bump your HP and allow you to run extra booooooost, arrrrrrrrrrr arrrrrrr arrrrrrrr

 

i hope you are happy moosestng, we are now arguing about over-oxgenating our motors with ethanol
..... by the way i am new to street bikes and have been using 93 in fear of detonation with the higher compression (then my standard car) i guess i will try out the old 87 and give her a go

 

This is some fantastic infomation im just curious what are your guys thoughts on cold fusion..............