Use of the LASAR electronic ignition lowers the EGT actual temperatures by 70 to 90 degrees F from that delivered by the use of magnetos.

That is an indicator that the REAL timing is NOT right.  Lower EGTS are the result of advanced timing.  This is NOT good.  If the timing is correct the EGTs will NOT be lower.  PERIOD.  This is one example of when lower temps are NOT good.

We have tested magnetos and electronic devices and find that the actual spark event does not coincide.  This can be VERY bad.

Walter Atkinson
Advanced Pilot Seminars