[Mahler9th]

We saw a number of JE piston failures in our Norcal area several years back (mid last decade). Quite a few of them were 98 mm pistons that failed in the wrist pin area. We also saw some failures in larger displacement apps. My own 102 set suffered from cracks in several domes at about 25-30 hours of under 7500 max revs. The cracks got big enough for massive compression loss at RRIV at Laguna in the Sunday Group 7 race.

One NorCal driver/engine builder saw some big ones fail after about a half-dozen hours if I recall correctly.

My engine builder was one of the last holdouts to try various "new and improved" JE designs. But he has given up during the past few years, resorting instead to off the shelf and custom Mahle pistons for many applications.

These experiences were all with racing applications.