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1. [oletrucks] Pistons (score: 1): Author: James Collins <jxc7@psu.edu>; Date: Mon, 15 Apr 2002 22:23:13 -0400; Can anyone explain what the discription "Flat top with no valve reliefs" means in reference to pistons. This was from a sale of a "Set of 6 Chevy 235 +.030 TRW Powerforged pistons with pins. Flat top; /html/oletrucks/2002-04/msg00383.html (6,788 bytes)
2. RE: [oletrucks] Pistons (score: 1): Author: "Mike Baggese" <passnb4u@earthlink.net>; Date: Tue, 16 Apr 2002 13:36:49 -0700; Means that as you look at the top of the piston, there are no little "1/2 moons" cut into them, but are a flat surface. Some need valve reliefs for high-lift/high duration cam profiles and/or high co; /html/oletrucks/2002-04/msg00384.html (7,833 bytes)
3. RE: [oletrucks] Pistons (score: 1): Author: "Peters, Jon C" <jpeters@sikorsky.com>; Date: Tue, 16 Apr 2002 17:17:32 -0400; Flat top = the top surface of the piston ( combustion surface) is well, flat. As opposed to most stock pistons which are "dished" or the center of the top surface is cut out somewhat. Usually the "va; /html/oletrucks/2002-04/msg00388.html (8,248 bytes)
4. Re: [oletrucks] Pistons (score: 1): Author: Thomas Allen <thallen@nwlink.com>; Date: Tue, 16 Apr 2002 14:43:48 -0700; Flat-top pistons are flat on top as the name implies. Valve reliefs are indentations fly-cut or cast into the piston crown so the valve won't hit the piston crown. If you're planning on running a lon; /html/oletrucks/2002-04/msg00392.html (7,859 bytes)

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