100 octane petrol OK?

In my country a few weeks ago started to sell 100 octane fuel. Now, i have
Kawasaki Z750S... until now i always (well, these 3 months i have tthe bike)
used euro super 95 octane one. I wonder, would be any good, (especially i
mean good for the engine) to start using 98 or this new 100 octane fuel?
Maybe it's not what i'm thinking, but last i filled my bike if i open
throttle all the way in 3 or 4 gear at 3-4k rpm, motor doesn't start
dragging immediatley, but mumbles a bit and yet then draggs...is it the
fuel's fault? As far as i could notice this doesn't happen if i don't open
throttle all the way...

 

100 octane won't hurt your engine. On the other hand, it won't make it go
any better.

The RON (Octane) number is a measure of the fuels resistance to detonation
under compression (knocking). The higher the number, the less likely the
fuel is to detonate rather than burn.

95 octane should be fine for your bike. Stick with that - it's cheaper.

Using a low octane fuel in a high-performance engine often leads to
knocking.

 

if you are going to use 100 octane then you will probably need to alter the
ignition timing as the burn cycle and ignition point of the fuel may well
be different

 

In California, the Birthplace of Hotrodding, the highest octane sold
at the pump is 91. In Slovenian, you can get 98 or 100.

Life is NOT FAIR!

The higher octane inhibits pre-ignition, ping. Pinging reduces power
and gas milage will suffer, making the purchase of higher octane fuel
worthwhile. If you are not pinging, higher octane fuel is a waste of
money, done for vanity.

Low compression mildly tuned engines run just fine on lower octane
fuels - which is why I put 87 octane into my Savage. If you have a
high compression high performance engine you may have a need for
higher octane fuel. Unless you have modified the engine your guide
should be the manufacture's recomendation.

That sounds like a jetting/carburetor problem to me. Assuming it used
to run fine I would suspect a partially clogged jet. Time to clean
the carburetor.

 

Bull Shit! All one needs do is advance the static timing setting (2-5
degrees) and go up a size or two on the main jets, derestrict the
airbox slightly and run one setting colder spark plugs. Combibe all
these things and you will gain 5-10% more peak HP. BTW, BOZO why do
the suppoe they sell racing fuel at the track???


[...] other bullshit snipped.

BTW, higher octane fuel also has higher BTU/gallon. Look back at the
threads here in dejanews (google) if you doubt.


Bob Nixon, Chandler AZ
01 Sprint ST "RED" 45K miles

 

Remember, however, that Europe uses RON, while the US rating is (RON+MON)/2.
That 91 rating is about 96 RON.

 

That is what i feared...the need of adjustments...since bike has fuel
injection, this involves changing eprom map...

 

I don't think I've read such shite for a while.

Oh, I dunno; maybe so that engines that are built for it can actually
use it?

 

sorry for that...

Hm...bike is 3 months old and has fuel injection,so, this means going to a
service...

 

Paladin wrote

snip

I think maybe you had it even righter than you realise the first time - If
you have a lower compression engine which runs well on 95 octane 95 Octane's
akshooally probably the *better* fuel to use ...... there are few claims
about that it burns better, 'neater' than higher Octane. And its certainly
cheaper.

Lotta folk think the higher the octane the more 'power' there is locked up
in the fuel itself.
That's simply not so.
Higher octane simply means ability to withstand greater compression without
pre-ignition occurring ....and its *that* which allows a more powerful
*motor* to be used. In other words there's not more power in the fuel
itself, it simply allows more power to be developed by the engine ..... but
only if the engine's already configured to do that. Uprating the fuel
without increasing engine compression gains nothing and *might* even loose a
bit of performance because of a worse burn.

The drop off Sleeper noticed may just be that .... tho as its so pronounced
you maybe right about a fuel feed problem. Best thing to do it dump the
problem petrol and refill with 95 octane petrol known to be OK (There's
always a chance the allegedly high octane petrol is contaminated). Then if
the problem goes away ~ sorted. If it doesn't,OK start cleaning the fuel
feed.

Why anyone would want to put higher octane in than necessary once they
understand what octane rating's *really* about is beyond me - Its like a
mark of ignorance IYSWIM ;-P


--
Nidge
R1 like an old newspaper. ZX6R J2 Stunning in zit yellow. KX 125 MX 'I'm
snot green -fly ME'. A few bits of CB500S in Norwegian Parrot blue.
BOTAFOT#63 BOMB#5

'Just because I don't care doesn't mean I don't understand'.
Homer (Simpson).

 

You could advance the timing a bit though, which has almost the same effect
as upping the compression if the cam profile is decent.

 

Reasonable thinking. so, first of all, if this problem persists, then a
visit at service (bike is under warranty)

 

*ding!*

 

)

 

Bullshit yourself.
Octane rating has NOTHING to do with specific energy content
of the fuel. It's simply a measure of the fuel's ability to resist
detonation.

 

Did not know that. BYBOYC.

 

That's just one thing higher-octane fuel does. There's more you
ignoramus. Stock 600cc bikes running avgas (106 or > octane) or race
fuel, with no other changes will yield 2-5 extra HP.

Several things add the power:

Higher BTU's per volume
more oxygenation in the fuel

This said, the added power will never justify the higher price of
avgas or racing fuel, when used on a day to day basis, solely to
improve fuel economy.


Bob Nixon, Chandler AZ
01 Sprint ST "RED" 45K miles

 

Bollocks, Octane is the measurement of eight carbon chain hydrocarbons
present in the fuel and nothing else, the hint here is in the "oct"
part you utter fuckwit.

--
Martin:
"For a minute there, you bored me to death."
VTR1000 Firestorm
TDR250 http://ukrm.net/BIKES/Yamaha/tdr250.html
martin dot smith nine zero three at ntlworld dot com

 

He actually said "octane rating" and he appears to be partly right;
http://www.faqs.org/faqs/autos/gasoline-faq/part3/

 

You've spoiled it now!

--
Martin:
"For a minute there, you bored me to death."
VTR1000 Firestorm
TDR250 http://ukrm.net/BIKES/Yamaha/tdr250.html
martin dot smith nine zero three at ntlworld dot com