when i changed to hfc i was told it take 100 to 200 miles for the ecu to adapt but i could be wrong.
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Rs7 : 10.4 133.50 with a 1.7 60ft Toyo R888
F10 M5: 11.308 131.96 with a 1.9 60ft Street Tires
E90 M3: 11.2 126.7 with a 1.8 60ft Street Tires
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