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Off-Topic Discussion
Off-Topic Discussion
Another Word About Octane
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<blockquote data-quote="900gc" data-source="post: 1375407" data-attributes="member: 28365"><p>Back when I had my '98 E38 (740il) BMW, I attended a performance workshop hosted by tuner Steve Dinan. The E38 was tuned to require 91 octane but he said that the ECU would compensate for higher octane and would increase HP and torque a small amount with 93 or 94. I went to other way and ran 89 which I imagine knocked back the tune a bit to prevent pre-ignition. Honestly, if the difference in octane grades would technically show on a dyno graph, I couldn't tell the difference between 89 and 94 performance wise in every day driving .</p><p></p><p>My SV race bike has 2mm over, 14 to 1 compression ratio pistons so it needs 98 or so octane, I have to laugh at track days when guys pull up to the Sunoco race gas pump for their $8 gal. waste of money fuel in their stock street bikes.</p></blockquote><p></p>
[QUOTE="900gc, post: 1375407, member: 28365"] Back when I had my '98 E38 (740il) BMW, I attended a performance workshop hosted by tuner Steve Dinan. The E38 was tuned to require 91 octane but he said that the ECU would compensate for higher octane and would increase HP and torque a small amount with 93 or 94. I went to other way and ran 89 which I imagine knocked back the tune a bit to prevent pre-ignition. Honestly, if the difference in octane grades would technically show on a dyno graph, I couldn't tell the difference between 89 and 94 performance wise in every day driving . My SV race bike has 2mm over, 14 to 1 compression ratio pistons so it needs 98 or so octane, I have to laugh at track days when guys pull up to the Sunoco race gas pump for their $8 gal. waste of money fuel in their stock street bikes. [/QUOTE]
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Off-Topic Discussion
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Another Word About Octane
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