Long story short, everyone thinks that a tune will save a badly built motor.

Cliffs, Wiesco's don't like .004" clearances (I know this but HE didn't when HE built the motor TWICE, you can check on Wiesco's website), 5th gear pulls on summer days create lots of heat in cylinders, pistons expand with heat, with no clearance pistons hit cylinder walls, SOMEHOW THIS IS BECAUSE OF TUNE.

Guy made lots of claims but never showed evidence or any reasonable explenation. I showed proof of my side and never heard from him again.

http://www.mx5atlanta.com/forums/showthread.php?t=4988