Topic: 3 cyls at +.030 and 1 cyl @ +.040 Whatdoyouthink?
So the first Mini motor we destroyed was our original that was +.030 when we dropped a valve and shattered a piston, but the bore looks ok (I'll check the crank before reusing and I'll replace that one rod with one from one of the other blown motors).
Unfortunately, finding a single 998 +.030 flat top TRW piston has proven impossible. However, while cleaning out some parts storage (me CLEAN?! yes, I did a little) I found a single +.040 998 AE flat top piston that I bought by mistake a few years ago thinking I was buying a set but didn't ask enough questions before sending money...
Anyway, I was thinking... would it be THAT awful to have 3 cyls at +.030 and 1 at +.040? I could always use a tiny scale and try to make sure the weights are close and I could even do some combustion chamber altering to get the compression ratios close to the same...
Other consideration: the 3 x +.030 pistons are 4 ring full skirt while the +.040 piston is 3 ring slipper skirt.
I'm interested in hearing the concerns I should consider before I do this.