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The Terminator
Turbo Cobras
Running higher octane than the tune?
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<blockquote data-quote="Fat-cat" data-source="post: 11234964" data-attributes="member: 37236"><p>If your car is tuned for 93 octane and you put MS109 in it the car will run Rich with no change to the fuel volume / ignition timing commanded. The reason as you mentioned is the burn rate. You will be passing allot more unburnt fuel causing the car to run like a bag of shit. on an NA application you will not notice this as much as you do on a Boost application due to lower ignition timing both base and advanced than that of an NA car.</p><p></p><p>The if you are talking 10 octane points you wont notice a diff but going from pump gas to race gas with no changes the car will run a richer A/F and burn more gas due to a poor ignition curve for the fuel being run. My Whipple car on C16 on the street tune would run almost a full point richer at WOT and cruse than pump fuel. .</p></blockquote><p></p>
[QUOTE="Fat-cat, post: 11234964, member: 37236"] If your car is tuned for 93 octane and you put MS109 in it the car will run Rich with no change to the fuel volume / ignition timing commanded. The reason as you mentioned is the burn rate. You will be passing allot more unburnt fuel causing the car to run like a bag of shit. on an NA application you will not notice this as much as you do on a Boost application due to lower ignition timing both base and advanced than that of an NA car. The if you are talking 10 octane points you wont notice a diff but going from pump gas to race gas with no changes the car will run a richer A/F and burn more gas due to a poor ignition curve for the fuel being run. My Whipple car on C16 on the street tune would run almost a full point richer at WOT and cruse than pump fuel. . [/QUOTE]
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Running higher octane than the tune?
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