Bob,
I used a set of 87mm Mahles in my street/AutoX TR3 engine. So far, so good, but
my engine doesn't see "real" racing either.
The only downside I know about them was that my (really picky) machinist
indicated that the piston set I had varied considerably in weight piston to
piston. I don't know what he felt was considerable, since the work was done
before I had any weights. When I got them, the pistons were all exactly the
same weight, as were the conrods, etc. I don't believe it was a big deal, but I
could see where he had trimmed back the inside skirt edges of three of the
pistons to get the weights even.
I don't believe these pistons can be considered light though.
Jack Brooks
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