What to expect when running 98?

[BASS-TREBLE]

It's monday night and I'm bored...
What would be a noticeable difference when I change from 91 to 98 octane?

Stock carbed FZR apart from the can.

[NDORFN]

It's monday night and I'm bored...
What would be a noticeable difference when I change from 91 to 98 octane?

Stock carbed FZR apart from the can.

Power... noticable mostly because you expect to notice it. Do a timed run down a straight stretch of road on 91 and again on 98 to be scientific. Mightn't make a measurable difference at all.

[ready4whatever]

better mileage, although darer. try 95

[1wheel riot]

in the long run it will cost you the same. it will take 2 or 3 tanks be for you see much diff but it keeps the motor cleaner you get more power and more km per leter i use it in my crf cbr integra and falcon.

[johan]

Hi!

I'd like to learn about this octane thing, I might gain a few seconds at the track!?

How come I get better milage and power with higher octane?

cheers

[McDuck]

Hi!

I'd like to learn about this octane thing, I might gain a few seconds at the track!?

How come I get better milage and power with higher octane?

cheers

It is somthing to do with the fact that the engine can compress it more therefore being able to get more power out of it.

Sombody who knows about it will be along soon

[onearmedbandit]

To get any real noticeable increase from higher octane takes an engine in a state of tune that requires higher octane, ie increased compression ratio, ignition advance, etc etc.

Whether it burns cleaner as the marketing says someone who knows more than me will be able to fill us in.

[MaxB]

It's monday night and I'm bored...
What would be a noticeable difference when I change from 91 to 98 octane?

Stock carbed FZR apart from the can.

Run it on what the handbook says.

If you really have to know put a tank of 91, 95 and 98 through your bike and see what (if any) difference you get. Then work out if the extra ks per tank is worth the price difference to you.

[F5 Dave]

It is somthing to do with the fact that the engine can compress it more therefore being able to get more power out of it.
. . .

Unless your engine knows that it needs to compress it further & can morph this transformation then of course it can't compress it any more.

If it could then it would make a difference. More compression usually leads to a higher BMEP. Sort of. Ignition timing is a factor as well.

Octane isn't a measurement of calorific energy & it is well possible to have a lower energy fuel with a higher octane rating.

But like with any comparison most people will subconsciously alter their riding habits to reap more power/mileage or whatever & thus the internet knowledge is written.

On the other hand some bikes close to the limit can gain, most will be no better & often worse.


Burn cleaner? What a laugh. Marketing bumph.

[AllanB]

I cannot notice any difference between 91 or 95 on my 900 - owners book says 87 plus or something. Honda shop says 91. Compared to a sports bike my engine is in a mild state of tune so anything over 91 is probably a waste of money.
Sometimes I mix it up just to see if there is any difference yet Secretly I am waiting for that turbo effect the adverts imply with rose petals flying out the exhaust pipes.

[CookMySock]

What would be a noticeable difference when I change from 91 to 98 octane?

Nothing. Unless you have a really high-compression engine you won't notice anything.

I get better range on 95 or 98 octane. 280km vs 330km ish to a tank.

Steve

[dogsnbikes]

have tried all the octanes with the daytona and the results were as on a 17.5 litre tank and a top open road speed of 110kph

98=341kms

95=262kms

91=227kms

triumph also recommends that the bike is running a mimumin of 95 octane on standard factory settings
so I run 98 when ever possible

[Hitcher]

What would be a noticeable difference when I change from 91 to 98 octane?

Fuck all difference from switching to 96, apart from the ludicrous price premium.

And V-Power wasn't invented by Ferrari. It comes out of the same drum as everybody else's 96.

[nallac]

have tried all the octanes with the daytona and the results were as on a 17.5 litre tank and a top open road speed of 110kph

98=341kms

95=262kms

91=227kms

How the Hell can you get an extra 120 k's out of a tank between 91 and 98
fuel?????... was it the same sort of trip and riding?.

[dogsnbikes]

How the Hell can you get an extra 120 k's out of a tank between 91 and 98
fuel?????... was it the same sort of trip and riding?.

because the mapping of the ECU favours the higher octane

the trip always the same roads which I use to do alot of for 2 years was Commuting from umutoi(60ks north of palmerston north) to wgtn 210ks each way