Ordinary 91 or Super 96 Unleaded??

[ALTRON]

I always run my NC30 on 96 but it doesn't mind running on 91 though

[Marmoot]

Incidentally - does anyone here know what sort of fuel the 2001 VFR800 is supposed to use? I've been having some problems with it when it's very hot - if I stop at an intersection, then take off a moment later, it sounds as though I'm in the wrong gear (cue noises of knocking/pinking). I was going to try some BP Ultimate, but I forgot the BP near home doesn't have it any more.

(in my serious mode)
It is the fuel not having enough octane to slow down the burning process, hence detonation (knock and ping) occurs because the combustion chamber is too hot and the fuel mixture ignites before the spark occurs (before the ignition should take place).
If you increase the octane (i.e. use 96 instead of 91) then the combustion will be retarded and detonation will stop occuring.
When it cools down (getting back in the winter where cool air helps cool the engine down), go switch back to 91.

[vifferman]

If you increase the octane (i.e. use 96 instead of 91) then the combustion will be retarded and detonation will stop occuring.

Or add water, right?

Hmmmm.... wonder if I could add an extra hose and a water pump to the injectors ....

[Marmoot]

Or add water, right?

Ahh, wise words. I've never thought of that. GENIUS!
High octane means slower burning petrol (retarded ignition). Water will slow down combustion. That means water will increase octane rating.
It's simply logic, isn't it?
So, I believe it is safe to say that Avgas is actually petrol mixed with water.

Ok....on to my application for a job in Government statistics with my great logic skill.

[Krusti]

But BP and Gull dont have Flybuys

[bugjuice]

what about RedBull? They claim it'll make you fly.. Just a thought..

[Krusti]

[QUOTE=Marmoot]Ahh, wise words. I've never thought of that. GENIUS!
High octane means slower burning petrol (retarded ignition). Water will slow down combustion. That means water will increase octane rating.
It's simply logic, isn't it?
So, I believe it is safe to say that Avgas is actually petrol mixed with water.

QUOTE]

If ya leave the Avgas in the drum long enough it does end up mixed with water!

[Teflon]

As somone said before higher the octane the slower it burns.

If you use low octane fuel in a high compression engine, the fuel ignites under compression and not from the spark, i'm sure this is what they refer to as 'pinking'.

I use 91 octane in my VTR because of the low compression and runs great, somthing like a TL would benefit from high octane fuel.