What are these strange Pistons?

[Brian]

So Walt...Let me see if I've got this right- the shop took the .040 wall sleeves out to .030" oversize, meaning the walls of the steel sleeves now were .025" thick? And they didn't collapse? And that engine then ran like that?

[Walt Dupont--Me.]

Originally Posted by Brian

So Walt...Let me see if I've got this right- the shop took the .040 wall sleeves out to .030" oversize, meaning the walls of the steel sleeves now were .025" thick? And they didn't collapse? And that engine then ran like that?

Yea Brian, they honed ,030 out of the sleeves, and as far as I know the car is still running with the aluminum .030 pistons. I've removed many of the tin can sleeves and bored .045 and used Std 3-3/16 pistons it makes a good little engine with the A heads. Everdently the .025 sleeves fit tight in the thick block walls, I would never do it. Walt