Re: polished piston tops
polishing piston tops gives you several benefits to flow, heat reflectance, and reduction of carbon buildup, and is definitely a worthwhile thing to do, and can be done when you have the head off, which can't be said for heat treating them...you gotta take em out, which is a bit more work. Don't paint them! While you are polishing piston tops, polish the combustion chamber too, and gently ease any sharp edges, as well as smoothing the little bits of thread exposed where the spark plug comes through; and you will reduce the likelihood of pinging, which is exacerbated by little sharp edges becoming hot spots. Heat treating a cast aluminum piston is gonna be a waste of time and money....what do ya think happens to heat treeating benefits when the part is re-heated? It works for steel parts, especially forged ones, which is of course why people who need lotsa power run forged......
73 240Z very orange
Dual Weber DGV's, header and 2.5 exhaust
Electronic dizzy with G.M. HEI module
Tokico Struts/Springs, Full Poly U bushings
Daily driver, all work done by me