The calorific value, amount of energy stored in the fuel, is not affected by octane additives. That's why we tune for more aggressive timing schedules and lower AFR's to get the most energy out of the gas and higher octane gas can assist in achieving more aggressive timing schedules.
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Vette: 355 cid, 400 rwhp
'13 CTS-V Coupe: 6.2L LSA, 556HP
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