My current Indy EZ heads were a flat surface outside the chamber area, which made the flat quench pad on the piston have a parallel surface in relation to the head surface. My engine builder is recommending what he referred to as having the heads/chamber "softened" to enhance the combustion chamber and to further reduce the incidence of detonation when running north of 10 to 1 compression on California pump swill.
I haven't read much about that concept. Does anyone out here know of this concept?
1970 Plymouth 'Cuda #'s 440-6(block in storage)currently 493" 6 pack, Shaker, 5 speed Passon, 4.10's
1968 Plymouth Barracuda Convertible 408 Magnum EFI with 4 speed automatic overdrive, 3800 stall lock-up converter and 4.30's (closest thing to an automatic 5 speed going)
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