Thanks for the following comments: "BUT back then the rebuild kits came thru with FORGED pistons . Now a new rebuild kit comes with a CAST Aluminum piston and a cast piston will not transfer heat from the top to the skirt as fast as a Forged piston will and it will swell more above the top ring due to heat . The difference between the skirt and where the rings set runs about .019 -.021 smaller then the skirt , and when these engines are working the heat from this new gas burns way hotter then the old gas did thus the cast piston can and will swell over .025 -.027 . and this will lead to a seized engine and this happens above the top ring." end quote.. ------------------------------------------- I had one of the 1700 or so new 1965 Corvettes sold to the public with the highest performance 396 ever built. One big reason advertized was that it had Forged pistons when the lower rated 396 in Camero had cast as well as other lower cost parts. Mine was factory Redlined at 6,400 and most took it much higher and for long periods of time. Now I know more why my 396 was considered one of best built high HP/high RPM engines GM sold to the public back in '65 thanks to your comments of heat transfer in cast vs forged pistons. It would be interesting to hear more on other designs in that '65-'66-'67 series of Corvette highest HP engines. ag
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Today's Featured Article - Box Plow Blues - by Tom Schwarz. One of the first implements most tractor owners obtain is the box plow. For very little money, this piece of equipment promises to plow and flatten any hill or vale on your ranch road or farm. At least that's what I thought! As simple as a box plow appears, it can be rather challenging to make work correctly. In our sandy soils of Florida, traction is king. You can never have wide enough tires or heavy enough weights to get all the traction you want … unless you own a monster tractor. U
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