LSA Question

Phreakish said

You've confused LSA with intake centerline.
LSA will not change IVC, it changes exhaust valve opening and closing if the ICL is kept the same.

Wallace Racing - Cam Degree Calculator

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Then why does every inv closing calculator ask for the lsa and if the cam has been advanced? I've used this same formula to check against cams that include the inv closing point and it gives the same answer as the cam company showed for their cam