Quote:
Originally Posted by Rusty
Clutch no. You need intake and exhaust mods to need a tune.
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Quote:
Originally Posted by crazy4oldcars
A tune is used to adjust air to fuel ratios to optimum based on intake and exhaust geometry.
Mechanical, i.e. drivetrain or suspension, mods do not directly affect AFR.
Kirk B.
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The Rules-Of-Thumb are:
Intake mods only - no tune required; the ECM will compensate.
Exhaust mods only - no tune required; the ECM will compensate.
Intake + exhaust mods - tune required.