93, 94, 100 octane... will it matter.
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From: Milwaukee Wi
My credentials I am a Master Automotive Tech. I just think that we should , if we don't know, use the internet to better understand what we are asking. Many people think by using high octane that you will make more power, this is incorrect. But of course if anyone would of done a search they would know this already. We have many tools in front of use but funny how we forget how to use them.
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From: limerick
Originally Posted by FO2K,May 8 2005, 11:14 PM
You will not get detonation with 87 octane because the ECU will retard the timing so you do not get knock.
I guess you did not understand my post. The ideal octane is the one that will not introduce knock, causing the ECU to retard the timing. I would venture that this is not 91 octane, but more likely 93 or so.
What are your credentials, that you make your statements with such certaintude?
I guess you did not understand my post. The ideal octane is the one that will not introduce knock, causing the ECU to retard the timing. I would venture that this is not 91 octane, but more likely 93 or so.
What are your credentials, that you make your statements with such certaintude?
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From: Fair Oaks
Originally Posted by exceltoexcel,May 9 2005, 07:04 AM
I would imagine his credentials revolve around his reading ability in as much as he can read the fvckin manuel and it reads 91!
BTW, I am aware of what the manual states, if you read the thread you will see I referred to the 91 octane printed in the manual.
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From: Land of Cincinnati Chili
That's how you get 89 octane at the gas dispenser. It is a mix of 87 and 93 in a proportion (more 87 of course). There are typically only 2 types of gasoline stored at a given gas station (the highest and lowest octanes). Everything else is mixed prior to dispensing. This has been going on for years. Sunoco actually started this I think with their "Custom Blend" selector back in the 60's (?).
I would imagine that very few stations now have separate tanks in the ground for middle grades of gas.
By the way, I don't roll my own in the S. It gets run pretty hard sometimes. I have been known to do this in my old Lexus from time to time, though.
I would imagine that very few stations now have separate tanks in the ground for middle grades of gas.
By the way, I don't roll my own in the S. It gets run pretty hard sometimes. I have been known to do this in my old Lexus from time to time, though.
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From: South Jersey
I'm sure 91 octane is the limit of the ECU's timing retard using the knock sensor. The ECU can only retard so much timing and any less octane than 91 would probably cause damage. That is not to say that using 92, 93 or 94 would not yield more power depending on conditions such as temp and humidity. For example if it's 100 degrees out, I'd be willing to bet an S2000 would put down more power with 94 than 91. Not that running 91 would be dangerous, it just wouldn't make as much power because the ECU would be retarding timing.