Does any one know what the stock 90-92 5.7L pistons weigh? with or w/o pin.

And while I'm pushing it, how about connecting rod weight info.

Hopefully someone has weighed these / has spec sheets/ or has their balancing info sheet.

 

I've measured a few sets of stock (cast) pistons and assemblies. 350 cast pistons are typically in the range of 545-555g, pins usually run around 140-145g, standard cast ring sets are about 53g, Rod bolt nut sets usually go about 75g for both pairs (all four pieces), stock (untouched) rods have been about 330-350g without caps, and rod caps are often between 137-145g.

That varies widely between engines, and flat versus domed pistons. I don't have any data directly from a 90-92 L98, but just a handful of other stock 350s.

 

I have a set in my bedroom right now, but I don't have a scale.

 

I don't have a set from 90-92 but I weighed an earlier set from 1987.... 1408g for the whole shootin' match (minus rod bearings). That the piston, pin, rings, rod, rod bolts and nuts.

Stock pistons are in the 525g range, wrist pis around 135-140g, stock rods will come in around 625g. The rest is the rings (about 50g) and rod bolts and nuts (no idea).

By my estimates that's 1335g plus whatever the weight of the rod bolts is, so 1408g actual measured weight squares up about right.