-----Original Message-----
From: Peters, Jon C
Sent: Tuesday, April 16, 2002 5:15 PM
To: 'James Collins'
Subject: RE: [oletrucks] Pistons
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 "valve cutouts" are to
eliminate potential interference between the valves and the piston when the
valves are open and the piston is up (for high-lift/high duration cam
profiles). Flat top pistons increase the compression ratio because they
"fill up" some of the volume in the combustion chamber.
Jon C. Peters
-----Original Message-----
From: James Collins [mailto:jxc7@psu.edu]
<mailto:[mailto:jxc7@psu.edu]>
Sent: Monday, April 15, 2002 10:23 PM
To: oletrucks@autox.team.net
<mailto:oletrucks@autox.team.net>
Subject: [oletrucks] Pistons
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
with no valve reliefs. 3/32, 3/32, 3/16 ring grooves."
Shamus
1950 3100
oletrucks is devoted to Chevy and GM trucks built between
1941 and 1959
oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
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