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Performance Volvo Cars A forum for those interested in any Volvo performance car from any era, FWD, RWD and AWD! |
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Tesco Super 99 or 97 OctaneViews : 7198 Replies : 87Users Viewing This Thread : |
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Aug 17th, 2007, 15:41 | #31 | ||
Roary The Racing Car.
Last Online: Jul 18th, 2014 09:00
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I am still waiting to hear what a 97RON can or can't do for a car thats been modified. As far as I am aware, its good to use a higher RON which is mostly to deal with detonation. The language as told to me years back is that the internal engine has hot spots and cheap quality fuel or in this case, lower RON are prone to igniting before the spark goes (full compression). So to prevent this, a higher RON is used which helps. My thinking and correct me if I am wrong since I am in no way technical but curious, for cars that have been modified and trying to squeeze the last bhp out of it (within parameters of not causing a blowup), one should then use a higher octane. Something Georgey Dee mentioned. By giving the car engine the "right" juice the ECU learns, then adjusts ignition etc to maximise what it is being fed. Give it crap, BHP is down as ECU has to readjust to what it has to work with. Thats my take on it I would like to know more if I am mistaken. Please do explain further why you claim what georgey Dee wrote is wrong .. all of it. cheers. Quote:
Sounds like a different way of saying the same thing George penned down. "As for a standard car,,,,, well the ECU does 'learn' what fuel your using, thats why some companies claim that you use less fuel on super therfore saving money,,,,HHMMM. Your T5 will after 10 miles of driving learn that super is in it and wind off the fuel... The difference being that if you need more it's there in the form of increased octane." Awaiting your explanation on this. Thanks cheer |
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Aug 17th, 2007, 16:37 | #32 |
Premier Member
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I would always put 97 and above in a modded car. The ECU can only vary fuel so far than It cuts the ignition to protect the engine. If you run a higher octane the ECU can cope better with the Mods.
That's the best way I can put it without causing an argument.
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Aug 17th, 2007, 19:18 | #33 |
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I have filled the tank on my 940 with Vpower on the odd occasion that I am near a Shell garage and have noticed a difference.
Normally it gets Tesco's or BP but with the Shell it's is a lot smoother and idles slower. I guess the engine runs cleaner with the Shell petrol in it and the management doesn't have to compensate by increasing the revs. Shame about the price though. |
Aug 17th, 2007, 20:03 | #34 |
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i take it that we should all use v-power in our volvos then i do and wont use anyother it doesnt run the same without it.
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Aug 17th, 2007, 20:24 | #35 | |
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Yes it's one of the best fuels out there. Sure it costs more but c'mon it's only like a quid or so extra a tank. Drop in the ocean. Compared to the better return and less likely to have problems. It's all a con though - our cars will run on water really. Vipes
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Aug 17th, 2007, 21:09 | #36 | |
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for an extreme example of how ignition timing affects torque read up on how antilag works. higher octance fuel allows higher cyl pressure, thats all!!!!!!!!!!!!!!!!!!!!!
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Aug 17th, 2007, 21:12 | #37 |
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[QUOTE=Georgey dee;276932]I would always put 97 and above in a modded car. The ECU can only vary fuel so far than It cuts the ignition to protect the engine. If you run a higher octane the ECU can cope better with the Mods.
QUOTE] the ecu can only vary fueling so much??? how much fuel do think the engine uses on idle compared to when on WOT?
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Aug 17th, 2007, 23:52 | #38 |
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Hi,
Just an interesting side note for you peeps here.. In Germany and Sweden the "regular" unleaded is 91 RON.. Super is our regular 95 RON.. And as for Shell V-Power is (in Germany at least) 100 RON... Yummy stuff!!! Des. . .
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Aug 18th, 2007, 00:24 | #39 | |
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Hope you enjoyed your trip (and a real bummer I had to go to Manchester instead!) I guess the only way any of us will catch up on your posting total is if you go away for 18 months. Good to have you back!
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Aug 18th, 2007, 02:11 | #40 | |
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A bottle of redex is £3.50 for 2 doses. So I am giving this a try.
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