98 octane fuels?

**scumdog** · 17th August 2007, 10:07

Originally Posted by Coldrider

Av gas is illegal on the road because it is leaded, but we are happy to have it spread by air all over the landscape aren't we.
.

Wrong.
It's because there has no road tax been paid on it.

**Coldrider** · 17th August 2007, 10:18

Originally Posted by scumdog

Wrong.
It's because there has no road tax been paid on it.

ohhh.... I stand corrected.

**Pancakes** · 17th August 2007, 11:23

and it burns out catalytic converters, thats why the box where my pipes join rattles now

**Coldrider** · 17th August 2007, 11:30

Originally Posted by Pancakes

and it burns out catalytic converters, thats why the box where my pipes join rattles now

Leaded fuel corrodes exhaust pipes as well, lead free allows exhaust pipes to last far,far longer.

**dangerous** · 17th August 2007, 18:53

Originally Posted by Coldrider

Leaded fuel corrodes exhaust pipes as well, lead free allows exhaust pipes to last far,far longer.

Dont cear, lead is a beter coolent/lube and the toxens aint as bad as all that shit they shove in unleaded... but try n tell the greenies that

But above all Avgas is a beter fuel with a more accurate oct.

**Coldrider** · 18th August 2007, 10:36

Originally Posted by scumdog

Wrong.
It's because there has no road tax been paid on it.

Wrong, Right, Maybe, Maybe not, as well as, lead cannot be added to imported petrol, nor can lead be added to NZ refined petrol, further more it is illegal to supply leaded petrol.
It is allowed for aviation, jetboats, competition car & motorcyle sport.
http://www.knowledge-basket.co.nz/re...95/1995270.txt
http://www.mfe.govt.nz/publications/...hapter6.9.html
We are a greeny country remember.
Apparently no lead petrol has about 0.003g lead contamination.
Interesting is the onus is only the supply of.

**dogsnbikes** · 18th August 2007, 11:40

Originally Posted by Delphinus

I've been running my Triumph on 91 and seems fine so far.. Will give 98 a try.

I run my Triumph on BP Ultimate and have done so for the last six months and have notice a huge difference in milage and performance where as now get 18-19Ks/litre on the BP ultimate where as with the 95/91 was about 12-14
and unlocking the ECU and rewriting helps

**Delphinus** · 18th August 2007, 13:31

Originally Posted by dogsnbikes

I run my Triumph on BP Ultimate and have done so for the last six months and have notice a huge difference in milage and performance where as now get 18-19Ks/litre on the BP ultimate where as with the 95/91 was about 12-14
and unlocking the ECU and rewriting helps

Good to know

At the moment I'm getting about 16.5KM/L if I'm not TOO heavy on the wrist

If I whip out the spread sheet and use 10L fill at current pricing.
16KM/L on 91 = 9.6c/KM
18KM/L on 98 = 9.2c/KM

So even if I just get another 2KM/L out of it the extra cost pays for itself... Theory works now to try the practise

What do you mean unlocking the ECU and rewriting?
I've had the fuel mapping updated to latest from Triumph...

**laRIKin** · 18th August 2007, 14:27

We use BP 86 in our Guzzi's, as it helps stop the pinking and they run better.
Mainly because of the shape of their combustion cambers as other big twins seem to get away with it.

And come to think of it, the KTM 640 single runs better on it, but does not pink.

**dogsnbikes** · 18th August 2007, 17:46

Originally Posted by Delphinus

What do you mean unlocking the ECU and rewriting?
I've had the fuel mapping updated to latest from Triumph...

basically by unlocking the Ecu means you can talyor the bikes computer programe to your spec's etc which makes power commander's and factory programes look very basic.......i:e I can get upto a extra 20hp without touching the engine etc

Not only does it change the fuel mapping but by setting your own fuel maps ie you could rewrite the ecu to run on just AV gas adjust the rev range up the red line limit, shorten or lengthen gear shifts so if you like to send your bike down the drag strip you could at the stroke of a key set your bike up just for the drags so really your opening up a lot of doors but you need to know someone that can unlock of where to get the programme to unlock your ecu

**JT.** · 18th August 2007, 18:11

Originally Posted by Brian d'marge

All Jap vehicles are designed for 91

Wrong, they may run on it but they aren't designed for low octane crappy fuel. The factory manual for my old car, an '84 toyota levin recommends 100 octane. High performance NA cars and all turbo cars should be run on the highest octane possible. The timing should be set to make use of it other wise you are robbing power and economy.

**Deviant Esq** · 18th August 2007, 18:52

Not all Japanese / high compression cars are designed to run on 100 octane gas. The Honda S2000 has pretty high compression and 240bhp extracted from a 2.0 litre four pot NA engine, and it's designed to run just as well on the 89 octane supplied in California. Not bad for a car with a 9000rpm redline and high compression.

For me? After reading a thread here a while ago saying the higher cost and octane of 98 or 95 fuel was of questionable benefit, I switched the NZ to 91 after having always used 98 in the past (as the engine has done high mileage). I've found that it runs better on 91 that it did on 98, and on top of that I get better economy as well. So with the bike running better on 91, as well as it costing less, I'd be sily to bother using higher octane fuel. On my next bike I'll be trying a few tanks of each pump fuel to decide which it runs best on and which I get the best economy out of, since it seems everything has a different preference.