What he's trying to point out is the star pattern on the piston. The injector is shooting outside of the bowl causing the pattern. If those trucks were taken into ford for service, the star pattern is a dead give away the truck was programmed or tuned.
The flower shaped pattern on the pistons is from too much timing. The injectors are designed to inject inside the bowl of the piston. Too much timing, and your burning it outside the bowl, and that's not good. A little is normal with a tuned truck.
the sct have a star pattern on the pistons to but you cant really see it as well because the pic was taken farther away and in less light. so what do yall see they look about the same to me both have the patterns.
ttake a closer look at the actual color if the piston, If you look there is a distinct diffrence in color between the 2 if you look close
the SCT is uniform and spread all the way across the piston and the banks is in a star patthern
Which is not evenly distributed!
The star patteren after time will give you a burnt piston
ok thats the pic that should have been put up. looks like its got soot on it. do you have a pic of a stock tune piston so we can see the differacne between all of them?
here is a better pic from the pistons of a truck that is SCT tuned with a race file with about 20k miles on the tune. Before that it was stock.
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