Ron, we were still able to get DFV pistons from Cosworth in the early 90s. I don't have any experience with JE pistons in DFVs, but we did find Mahle pistons in some engines. I still have a box of old DFV pistons somewhere.Ron LaDow wrote:BTW, Cosworth stopped providing DFV pistons when we were racing. Phil Reilly arranged for JE blanks (you got to design the dome and have it machined), but they ran (from memory) .003" tighter than the Cosworth parts.
Everybody who used them found an immediate gain on the dyno; keeping the rings square to the bore is really worthwhile.
Jon, didn't you do Bill's DFV about then ('97-'98 or so?)
Cosworth listed the recommended cylinder bore size for the pistons provided, as you can see on the label below.
