![]() ![]() The issue is that the pistons extend past the deck. Let’s walk through the process of what happened. Jeff Smith: This is always the risk when assembling an engine with used or unknown components but I don’t think this is a grenade as long as you pay attention to the assembly. Do you think this build will be okay or is it going to be a grenade ready to explode? Thanks. I’m doing all of this on a very limited budget. Some pistons are 0.014-inch out of block so I was figuring I had about 0.036-inch piston-to-head clearance. The class rules dictate the engine cannot run over 6,800 rpm that is set with a chip. I bought a set of Fel-Pro 1144 gaskets set at 0.051-inch thickness. I’m very concerned about the piston-to-head clearance. I discovered that the crank is a 3.50-inch stroke instead of 3.48-inches because some of the pistons now stick out of the block. I also bought a used forged crank and new H-beam rods and forged 11:1 floater forged pistons. ![]() I started out with a 0.040-over block that I think has been severely decked but I’m not sure how much. I’m building a Chevy 350 engine for my son’s circle track race car. In this photo, the piston is almost exactly even with the block deck height. Then bring the piston up to the TDC and read the amount on the dial indicator with the indicator above the wrist pin centerline. ![]() Place the dial indicator in the bridge and and zero the dial indicator on the deck of the block. The easiest way to measure deck height is with a custom tool like this deck height bridge. ![]()
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