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  #1  
Old 07-05-2011, 06:22 PM
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Default Why the 91 tune?

Ok, I've been reading through here (imagine that) and I notice a lot of people are choosing the run the 91 tune. I've tried the 93 and the MPG Booster. I didn't much care for the MPG Booster so went back to 93. But, I'm intrigued by the people running the 91 tune on 93 octane. Am I missing something?
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Old 07-05-2011, 06:33 PM
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93 octane gas is really hard to find in most places.
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Old 07-05-2011, 06:52 PM
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Sure, but it seems people are still running the 91 tune even though they're using 93 octane gas!
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Old 07-05-2011, 07:16 PM
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That is to be safe with detonation and pinging.
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Old 07-05-2011, 07:18 PM
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In my area 93 octane is almost at every station(can't remember the last time I saw just 91 instead of 93). I run the 91 tune because I couldn't tell a difference between the 91 and 93 tunes, and it is just a safety buffer. When I ran the 93 tune with my motorcycle in the bed of the truck, or 6 people in the cab, I would get detonation under load, now with the 91 tune and 93 octane I don't get the detonation with small hauling and a heavy foot. Superchips specifically told me that the difference between the 91 and 93 tune is just more timing advance, and the 93 tune makes approx 3 to 6 more hp. So in short, it's just a safety buffer from detonation, for me.
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Old 07-05-2011, 07:21 PM
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I don't know about off base...but on base we have 85, 87 and 91
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Old 07-05-2011, 07:27 PM
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everywhere around here in orlando we have 87 89 and 93
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Old 07-07-2011, 05:32 AM
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the norm around me is 87 89 93, i know there is one sunoco that has 91 but i refuse to buy fuel from them
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Old 07-07-2011, 08:50 AM
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I haven't bought fuel from sunoco in a long time...I think they do cash/credit pricing?
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Old 07-08-2011, 09:18 PM
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Quote:
Originally Posted by 67Polara View Post
the norm around me is 87 89 93

Same here, who sells 91?
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