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Author Topic: high octane fuel  (Read 15311 times)

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Kevin Wood

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Re: high octane fuel
« Reply #60 on: 15 March 2016, 13:31:34 »
The Omega ECUs have knock retard, in that they retard the ignition if fuel quality is so poor that the engine starts knocking. They don't advance the timing from the mapped values. It's simply a measure to protect the engine from "weasel pee". I've never seen a healthy Omega where knock retard has been anything other than zero, regardless of fuel.
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Lazydocker

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Re: high octane fuel
« Reply #61 on: 15 March 2016, 14:17:48 »
Ooh... This has been exciting! Handbags at dawn? :-X ::)

My experiences are that the V Power/Ultimate type fuels make no difference on standard road cars. Used to use it in the bike, which was noticeably different.

Better to stick a branded cleaner through periodically IMHO :y
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baggers

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Re: high octane fuel
« Reply #62 on: 15 March 2016, 16:36:27 »
http://iancctv.dyndns.tv:81/dash

This is on the flat, cruise control on and looks like the air-con is on as well  :y

Always get good return. 

Manchester to Dagenham on same tank &
Manchester to Swansea also on a tank not bad going that.
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Webby the Bear

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Re: high octane fuel
« Reply #63 on: 15 March 2016, 16:37:59 »
Quote from: jimmy944 on 15 March 2016, 12:55:03
Webby; not (really not) wanting to dredge up your 0-60 thread, but do omegas "learn" the fuel?

By that I mean that iirc Saabs adjust their mapping slightly dependent on the fuel you feed them so the first tank of Super Juice (TM) doesn't do much to alter performance but allegedly the car learns how to burn it better so future tanks show improvement.

Just to add: I suspect the "learning" thing came off a forum too so not sure if it's dangle berries or not.  :D

 ;D I promise I wont.................... 'til the right time! 8) :o 8) :o

no idea about learning mate to be honest. I didn't like the knocking noise it seemed to emanate so got it out of there sharpish  :y
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baggers

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Re: high octane fuel
« Reply #64 on: 15 March 2016, 23:37:42 »
The timing is already advanced, it is designed to retard it with knock control when required and will return to the highest advance value it's setup for until reaching a knock value. It's constantly in a yo-yo effect but always trying to reach the highest advance it can, on the 3.0 it will handle advance for 98 unleaded.

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omega2018

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Re: high octane fuel
« Reply #65 on: 16 March 2016, 01:14:04 »
 :y agree with that

as does the owners manual page 216

"Octane requirement 2.6V6 and 3.2V6
unleaded 95, 98(2)

2) Knock control system automatically adjusts ignition timing according to type of fuel used (octane number)."


apols i was out on the CR earlier it is not 10:1 on the 2.5 and 3.0 it is 10.8:1  (10:1 on the 2.6 and 3.2)
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STEMO

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Re: high octane fuel
« Reply #66 on: 16 March 2016, 17:32:33 »
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05omegav6

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Re: high octane fuel
« Reply #67 on: 16 March 2016, 17:52:06 »
Quote from: STEMO on 16 March 2016, 17:32:33
http://youtu.be/TEDznw1K-x4

Proof  ;D
And the even used a Volkswagen as the feature vehicle...

Who said ad agengies didn't have a sense of humour ;D
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