So I went to my garage, took my old '95 tranny apart and reassembled all of the internals outside of the transmission case. Then I decided to tear the oil pan off of the L36 I have in my garage. Here is what I found.... It'* not interesting to many people, but I find it useful.
Here is the standard rod and piston assembly. I intend to get an actual weight on these pieces sometime. The poor L36 guys need all the edge they can get, and if lighter rotating assemblies can be made, then a few more horsepower are freed up.
The cap has 7/16" bolt heads(3/8'* bolts?) and they were surprisingly easy to remove with a 12" 3/8th ratchet.
The piston head slightly wiped off. I think that it could be changed out for a flat top with valve reliefs for alittle more compression
The bearing had a nasty groove in it. What I found funny is that the saddle and cap had wear and not even the slightest showed on the sides of either bearing. Maybe that'* normal? I don't know, I haven't torn many of these things apart this far.
Then for chits and giggles I laid one of my forged H-Beam rods next to it for a little comparrison. The H-beam is 6.658" long..... Just about the same length as the piston and rod of the L36...
I personally think that the L36 powder metal rod(?) is a bit on the heavy side, and a set of I-beams would free up some weight there. The piston is a not forged from what I can see, and it feels fairly light. I'm sure you could order some custom lightweight pistons with valve reliefs as mentioned earlier and save a little weight... Maybe it'* just that the thing has sat for so long, but I can not get the wrist ping to rotate inside the rod leaving me to conclude it'* a press fit. If that'* true, then a full floating wrist pin setup wouldn't hurt either. Lighter is faster, and I wonder what gains an L36 could see from this....
Thoughts? Insight? I'm interested in this stuff, fill me in on what I missed and correct anything I have wrong!