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Old 03-15-2011, 10:12 AM   #1
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96 4.6 mustang

I was wondering if I needed different octane rating if I removed the cats? Someone told me that it should be higher so now im doubting myself
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Old 03-15-2011, 10:23 AM   #2
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Quote:
Originally Posted by frarey17
I was wondering if I needed different octane rating if I removed the cats? Someone told me that it should be higher so now im doubting myself
That is close to the most absurd thing I have ever heard. How would octane affect the cats. A catalytic converter burns the unburned hydrocarbons in the exhaust gases. Octane is resistance to detonation. The higher the octane,the harder it is to burn. Regular fuel actually has more energy than 93 octane.....k op take that as a sign to not listen to another word from that person. Like nothing....ever

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Old 03-15-2011, 01:25 PM   #3
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Agreed

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Old 03-15-2011, 02:50 PM   #4
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Re: 96 4.6 mustang

You do not need a higher octance setting. You just need to be sure and have the codes turned off with a correct tune.
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Old 03-15-2011, 03:30 PM   #5
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If you remove the cats, octane won't matter. As long as it doesn't ping/detonate under a load. Running a high octane such as race gas can damage the cats. But the CEL will come on first and the computer will try and compensate for it. If left with the CEL on it may damage them. If no cats, don't sweat it.
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Old 03-15-2011, 03:49 PM   #6
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Re: 96 4.6 mustang

if you have the stock tune it wont matter, if you have it tuned then run what ever the car was tuned for.
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Old 03-15-2011, 06:01 PM   #7
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Originally Posted by frarey17
I was wondering if I needed different octane rating if I removed the cats? Someone told me that it should be higher so now im doubting myself
Alright cool. Thanks a lot guys
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