i think its in your head that it runs like crap with lower than 91, unless you're buying crappy gas. i normally run 89, but i've run 87 multiple times with no problems. the lower the octane, the more power you're going to make if everything else is equal. running higher than neccessary octane does nothing for performance, again with all other things equal.

 

Well said. :+2:

 

I always run premium 91-93 whatever that particular gas station happens to carry. If they have non-oxy I always throw that in!!

 

This topic has been well discussed already. I run 87 octane in mine almost exclusively. Runs great on it.

 

New Mexico has no gas, its all tequilla you have been putting in there.

 

I did a test years ago on my 2005 ZX10r. I had it dyno tuned on 89 octane and made 161rwhp with just a slip on when a buddy with his 2004 ZX-10r with a full system on 91 octane only made 160rwhp.

When it is really hot out I will run 91, once it cools off I run 89.

 

4905 iscorrect.

 

93 all day

 

I'm in California, so 91 it is. If I had regular access to 93 I'd use that.

All of my toys are either high-compression or high-boost. Low octane isn't a smart choice. Detonation can kill a motor. My 2007 Tundra is the exception. It gets 87 per the owner's manual.

San

 

here is a thread i started here while back im sure you will find usefull.

http://www.zx-10r.net/forum/showthread.php?t=94459

 

Premium. I know it would be ok with 87. Altitude makes a huge difference!!! No matter what octane you are running.

 

you guys running 87 are ignorant, mine runs better using 91-93, i have been riding along time and its not in my head, manuel calls for 90+

 

That's certainly a bold claim. So who is this Manuel person telling you these things? Or did you mean manual and your grasp of the English language is as shitty as your claim? Let's see some dyno graphs to back up your claims. I have seen many that back up the claims of these members you call "ignorant."

ig·no·rant/ˈignərənt/Adjective

1. Lacking knowledge or awareness in general; uneducated or unsophisticated.

I do believe your post fits that definition very well.

ETA - If you want to be on the safe side, run only 90+. If you are trying to squeeze a little more performance out of your bike and the air conditions are good, then use 87. Don't start a thread asking a question, then call everybody that disagrees with you ignorant though.

 

I always run 91-93. I can def tell some power difference if not. I didnt buy a 1000cc to run crappy gas in it!

 

ok buddy, i didnt think anyone would say they were running 87 as these bikes arent made to run that, i was asking people that were running 90+ and if they were using octane booster, i really dont care if you dont know what type af fuel to put in your bike and i know any mechanical engineer would agree with me

 

You were told politely to act accordingly by nolazx10 a few posts back. If you want to get along here, calm down and heed that advice. Everyone will give you a warm welcome and do their best to help if you don't act like a dick.

I run 95 ron and sometimes 98 if my wallet will stretch to it. Can't feel any difference between the two. Too low a ron will cause what's known as engine knock.......not good!!!

 

nolazx10, go put 87 in a corvette, the check engine light will come on right away in any high performance fuel injected engine. engineers design engines to run a certain octance, you just cant put whatever you want in it. if you believe what you think you are ignorant. i know you wont get any benifit from race gas but you need to be running 90+ on these bikes, just becausesome guy told you to run 87 it doesnt mean it works the guy was just messing with you. i was just wondering what people were running over 90 i dont want to get replies from tards running anything less i hope somebody will +1 this reply

 

And as i was replying you act like a bigger dick.
:suicide:

 

In Aus,KHI recommend 95 RON or higher.I've always run on 98,never had a problem and my plugs are always clean.

 

dont tell me to clam down. im not mad at anyone and im not being a dick. in this country we can speak our mind and it is usually ok. u guys are getting worked up over nothing.

 

Us guys as you say aren't getting worked up!

And were not in 'this country'. We are on a multi-cultural internet forum.

I've put my $0.02 in and will leave it at that.........hopefully!


Oh, and from my experience, anybody that says 'don't tell me to calm down', usually needs to calm down!!!!!!!!!!!

 

Different markets, ie; Europe/USA/Japan = different minimum recommended RON. My small spanish waiter......uuhum, i mean 'manual':lol: states 'use 95 Ron minimum' I've personally never had an issue!:thumbsup:

 

I don't know why I'm waisting my time with you, but here I go. First off the discussion was not about a Corvette. Second, you are making ignorant statements once again. Let me quote you "the check engine light will come on right away in any high performance fuel injected engine." That is funny, the ZX-10R must not be a "high performance fuel injected engine" because I sure haven't gotten any lights.

Take a trip to a track and talk to some of the people there. See what they are running or better yet experiment yourself since you obviously don't believe anything anybody tells you. The fuel generally accepted as producing the best HP on stock motors is MR12 and its octane rating? 87. Why not MRX01 or U4.4 with their 98 and 103 octane? Those VP Racing Fuels guys must be ignorant not to make that MR12 higher octane!

Would I run 87 at the track when its 100 degrees outside? Nope. How about if I were spraying nitrous or raised my compression? Nope. However, at this time of the year we have great low temperatures and my motor is stock... 87 beats out 93.

Now maybe you are not running a stock motor, but you said nothing to indicate that you have raised the compression on it, running nitrous, or anything else that would require higher octane.

You asked a question, you got an answer. If you don't like it then maybe you should be more civil and provide data to back up your claims rather than just calling everybody ignorant. I am done.

 

I don't know why I'm waisting my time with you, but here I go. First off the discussion was not about a Corvette. Second, you are making ignorant statements once again. Let me quote you "the check engine light will come on right away in any high performance fuel injected engine." That is funny, the ZX-10R must not be a "high performance fuel injected engine" because I sure haven't gotten any lights.

Take a trip to a track and talk to some of the people there. See what they are running or better yet experiment yourself since you obviously don't believe anything anybody tells you. The fuel generally accepted as producing the best HP on stock motors is MR12 and its octane rating? 87. Why not MRX01 or U4.4 with their 98 and 103 octane? Those VP Racing Fuels guys must be ignorant not to make that MR12 higher octane!

Would I run 87 at the track when its 100 degrees outside? Nope. How about if I were spraying nitrous or raised my compression? Nope. However, at this time of the year we have great low temperatures and my motor is stock... 87 beats out 93.

Now maybe you are not running a stock motor, but you said nothing to indicate that you have raised the compression on it, running nitrous, or anything else that would require higher octane.

You asked a question, you got an answer. If you don't like it then maybe you should be more civil and provide data to back up your claims rather than just calling everybody ignorant. I am done.

You should have gone with the first 10 words, followed by the last 3. Waste of time, Enough said!

 

I run 98 in my 10R, KDX 250, chinese tarted up 125 scooter and lawn mower.

Call me old fashioned, but I've always believed that the more air you get in, the more potent the gas you get in and the quicker you can get all this out makes you go faster. Ok, its a different world, but running 98 compared to 93 adds 5 mph to the top speed of my 125 scooter. Its 55 mph on 93 and 60 mph on 98. And my lawn is definitely greener with 98 in the mower.

 

The average elevation in New Mexico is about 4,000'. For every 2,000' you climb above sea level octane demand drops by 1 point. I live and ride mostly above 7,000' in New Mexico and use mid-grade (88 octane) in my '08 ZX-10, '07 Aprilia Tuono, '07 Bimota DB6 Delirio, '06 Triumph Speed Triple, and '06 MV Agusta 910R Brutale- all with no ill effect. Between elevation and really cool air temps I could probably get away with 86 octane.

 

Guys, I think I have said it before but I'll go with it again as this is a pretty heated topic.

there are very few production engines that will need the higher octane fuel... unfortunatly most of those are high performance, high compression super sport bike engines (yes the 10r is one of them)

Octane does not increase horse power, cylinder pressure, compression, rotate your power bands or make your dick longer...

what it does do, is reduce the RATE of combustion inside the cylinder. Octane is a long chain hydrocarbon, most of what is in gasoline/petrol is heptane (5 carbon atoms with hydrogens sticking off) and hexane (6 carbons with hydrogens sticking off). Octane is of course 8 carbons with hydrogens sticking off each carbon atom)

when hydrocarbon combustion occures, the bonds between the hydrogen and carbon must first be broken, then each carbon combines with one or two oxygen, and each hydrogen combines with two oxygen in the fuel air mix. The braking of the bonds takes energy (spark from the spark plug) but once the reaction starts there is ample energy from the oxygen/carbon/hydrogen reaction to continue the reaction until the fuel is consumed...

what Octane does, is slow that process every so slightly, makes combustion just a touch more difficult, and slower.

This prevents pre-ignition in high compression, high performance engines. Preignition is of course the fuel/air combustion reaction taking place before the spark plug fires (I.E. the desired ignition point for the timing of the engine)

knocking... or as I like to call it ROD SLAM, is the result. this is VERY hard on the internal components of the engine like the crank bearings, wrist pin, rod bearings and pistons.

normally knocking is only noticed at idle and under very heavy load at low RPM.

just about everyone can put the bike in 4th gear and try to pull away from a dead stop and get some knocking... but at idle, when the bike is warm, there should be no knocking.

if you have knocking at idle when warm, consider a higher octane fuel, or a fuel additive to boost octane, although watch out for products that contain xylene or aniline as they will in some bikes have adverse effects on the O-ring seals in the fuel pump or injectors.

I just use 104+ Octane boost. and for most days driving I don't even need that.

track days you may want to use good fuel, If you can find it, 110 octane Avaition fuel is an inexpensive alternative to race fuel. Mix about half a gallon with 4.5 gal in a 5 gal can of premium gas from a reputable distributor. Av-gas is very clean and contains no xylene or aniline. Your resulting Octane should be 95 to 100.

the engine will last longer, but really shouldn't produce more horse power. So don't expect it.

if your bike is running crappy, when at temp, and at speed. That's not your octane, it's something else.

 

and then the rest of the story.....

Thank-you once again,Rifleman.

 

Rifleman explained it very well. You don't always NEED higher octane, but if you want the most power and want to safeguard against pre-ignition, you run it all the time. Kind of like riding gear.

An important reason to want slower burning fuel (high octane) is that the slower burn pushes the piston down throughout the ENTIRE stroke, where a faster burning fuel (lower octane) provides power at the top of the stroke (or worst-case scenario before the top), and then is absent from the party.

I like to use the shotgun (low octane) versus rifle (high octane) analogy. The shotgun is short-range (think piston stroke) and not very controlled. The rifle is long-range and very controlled.

San

 

yep, the higher the octane the more "push" instead of POW.

I like to use the Punch, vs shove analogy. low octane will be like a punch, hard and fast but you may only rock the guy an inch or so, give him a shove and you will send him across the room. If done correctly, it is possible to get more torque with higher octane, the pressure in the cylinder stays higher for a longer part of the power stroke. Alot smarter guys then I have figured out the optimal compression, bore, stroke, and fuel octane to make this happen.

My recomendation, get a 1/5th throttle insert and don't worry about octane unless you have knocking at idle

 

Hmmmm I wonder where I could find one of these 1/5th throttle inserts you speak of?? :lol:

 

theoretically max cyl. pressure generated tdc-15 degrees atdc. realistically, 5 degrees btdc-15 atdc burn should be complete for max power. after that, as piston decends, cylinder volume increases dramatically, effective compression drops the same way, and any fuel left burning generates little expansion to "push" the piston and generate power. there is no long push in power, just the rapid expansion of heat generated as fast, as close, to tdc as possible. consider the .045 hg at .008 thinner increases compression 1/2 pt, whats the compression decreased to at just.200 atdc as the piston is decending? no power made here, cylinder pressure has decreased, not increased, to a ineffective level to provide any additional power. also torque increases come from elevated cyl. pressures, not reduced.

 

Shit the bed gazx10, you've made my head hurt after that lot.

Let's hope that's given jsemm the answer he was looking for!