Originally Posted by sandrock
Not quite understanding your question. Given GM'* reluctance to change for the sake of change, I would have to say the L27 and L36 pistons are similar in the design department. L67'*, in both S1 and S2, got upgraded pistons and rods. The pistons in L67'* have their compression rings moved lower than the L27 and L36 counterparts, to reduce the chances of chipping under stress. ...
You answered it, anyway.
I'd misunderstood the weakness of the L27 being it'* piston (based on a previous statement), but I understand now that it'* a matter of PCM tuning ability (as compared to an L36, of course an L67 is another beast altogether).
I'll abort my thread hi-jack now. Thanks.