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View Poll Results: Be honest, What fuel do you use in your SVX | |||
always with Octane 89 or less | 0 | 0% | |
89, once in a while 91 or better | 3 | 5.45% | |
always with Octane 91 or better | 27 | 49.09% | |
91, once in a while 92.5 or better | 25 | 45.45% | |
Voters: 55. You may not vote on this poll |
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#31
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Hi Octain burns slower??????
Hi Octane does not burn slower. If it did, the engine could not run at a higher speed!
It only allows the engine to run higher compression pressures and temps without detonation. It does not produce more torque or HP. It allows the engine to produce more torque because of the higher compression ratio that can be used. Search the thread 'performance fuels except nitrous'. It went through the subject. Harvey. p.s. I use 96,
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One Arm Bloke. Tell it like it is! 95 Lsi. Bordeaux Pearl, Aust. RHD.149,000Kls Subaru BBS wheels. 97 Liberty GX Auto sedan. 320,000Kls. 04 Liberty 30R Auto Premium. 92.000kls. |
#32
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aussie 96 ?
Hi Harvey - since you're in OZ what specific fuel 'brand' would you recommend - if any? I guess that an octane level of 96 implies you run Shell Optimax??
Thanks, Pete. |
#33
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Oh, I forgot to mention, everything worths the opposite in the other Hemisphere, so Harveys also right.
Hey does anybody get the "Petroleum Bypass Engineer" thing?
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Chris G 92 Pearlie, sold @ ~209k miles. Now owned by Tim. Current Ride, 1985 Honda Aero 80, stock 3024 klms |
#34
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Re: aussie 96 ?
Quote:
Harvey.
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One Arm Bloke. Tell it like it is! 95 Lsi. Bordeaux Pearl, Aust. RHD.149,000Kls Subaru BBS wheels. 97 Liberty GX Auto sedan. 320,000Kls. 04 Liberty 30R Auto Premium. 92.000kls. |
#35
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Try this:
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#36
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Re: Try this:
Quote:
I would not be guided by it! Harvey.
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One Arm Bloke. Tell it like it is! 95 Lsi. Bordeaux Pearl, Aust. RHD.149,000Kls Subaru BBS wheels. 97 Liberty GX Auto sedan. 320,000Kls. 04 Liberty 30R Auto Premium. 92.000kls. |
#37
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Re: Re: Try this:
Quote:
I'm not an expert either (as the author of the site states), but it would seem that his information, while simplistic, was correct. What are his incorrect statements...?
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Mitch Hansen
"uncamitzi" This is a Dark Ride 92 Teal SVX LS-L 128K tranny swap with 4.11's Well.. my days of not taking you seriously have certainly come to a middle . |
#38
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Re: Re: Re: Try this:
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He states: "Octane, by definition, is the resistance to burn or detonation. The higher the rating, the slower the burn when ignited during the compression burn cycle of the piston. The higher octane allows for better control of burning for high compression engines. So we want to match the correct octane rating of the gasoline to the engine design to ensure complete burning of the gasoline by the engine for maximum fuel economy and clean emissions." The burn rate does not depend on octane rating, it depends on the fuel type itself. The octane rating does not control whether the fuel is completely combusted or not, this depends on the air fuel ratio. He states: "It did in older engines using carburetors to regulate air/gas mix They cannot as accurately regulate the air/fuel mix going into the engine as a computerized fuel injector. Carburetors need adjustment, as a part of regular maintenance, to keep the air/fuel mix as accurate as possible. So many times, these adjustments were not made regularly causing too much fuel to be mixed with the air. When this happened the gasoline would not burn completely soaking into carbon deposits. This would cause a premature ignition of the gasoline due to the intense heat in the engine cylinder creating "engine knock." When this happened, people would change to the higher octane/slower burning gasoline to resist the premature burn, thus minimising the knocking problem. And it worked. Good solution" He now is stating that a rich mixture would cause premature ignition of the gas due to the intense heat causing knocking. Rich mixtures don't cause excess heat, lean mixtures cause excess heat. He states: "When you use a fuel with a higher octane rating than your vehicle requires, you can send this unburned fuel into the emissions system. It can also collect in the catalytic converter." He is still confusing a rich mixture with the octane rating, excess fuel mixture will affect the catalytic converter. Octane has nothing to do with emissions. He states: ". In the early 90's, an early warning symptom was a rotten egg smell from the tailpipe. Easy fix, go back to using regular 87 octane gasoline. The rude odor usually disappears after several tanks of gasoline. " The smell was from too much Sulphur in the fuel. He states: "All gasoline burns at the same rate, it is the additives that create the different octane ratings for the different types of engines." This is the first time he is right. Harvey. This is a far better explaination http://www.geocities.com/motorcity/l.../octane1./html That link is not working. Go to the bottom of his site, click "Gasoline and Your Engine" in other references.
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One Arm Bloke. Tell it like it is! 95 Lsi. Bordeaux Pearl, Aust. RHD.149,000Kls Subaru BBS wheels. 97 Liberty GX Auto sedan. 320,000Kls. 04 Liberty 30R Auto Premium. 92.000kls. Last edited by oab_au; 01-16-2003 at 05:46 PM. |
#39
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I read through some of the contents and it appears that the individual has some good points, under specific circumstances, but there are plenty of holes in his logic.
His point is to make it simple, and that he did. Use what your car's manufacturer recommends, increase if it knocks, try lower if it doesn't. What we need is some raw readings from the Oxygen sensors to really test it out. Who's got some equipment hooked up to their Oxygen sensors?
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Chris G 92 Pearlie, sold @ ~209k miles. Now owned by Tim. Current Ride, 1985 Honda Aero 80, stock 3024 klms |
#40
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Hey, Harvey is right, read the other link, way better than the root site.See repeat url from Harvey's post, cause its that good: http://www.geocities.com/motorcity/l...0/octane1.html
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Chris G 92 Pearlie, sold @ ~209k miles. Now owned by Tim. Current Ride, 1985 Honda Aero 80, stock 3024 klms |
#41
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Quote:
Harvey.
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One Arm Bloke. Tell it like it is! 95 Lsi. Bordeaux Pearl, Aust. RHD.149,000Kls Subaru BBS wheels. 97 Liberty GX Auto sedan. 320,000Kls. 04 Liberty 30R Auto Premium. 92.000kls. |
#42
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Not bad for some-one who's toilet water swirls the other way.
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Chris G 92 Pearlie, sold @ ~209k miles. Now owned by Tim. Current Ride, 1985 Honda Aero 80, stock 3024 klms |
#43
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Quote:
Harvey.
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One Arm Bloke. Tell it like it is! 95 Lsi. Bordeaux Pearl, Aust. RHD.149,000Kls Subaru BBS wheels. 97 Liberty GX Auto sedan. 320,000Kls. 04 Liberty 30R Auto Premium. 92.000kls. |
#44
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Right. you just keep thinking that.... from a guy who doesn't get snow on their christmas tree's
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Chris G 92 Pearlie, sold @ ~209k miles. Now owned by Tim. Current Ride, 1985 Honda Aero 80, stock 3024 klms |
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