|02-04-2013 04:25 AM|
|02-03-2013 08:44 PM|
|02-03-2013 07:11 PM|
|firebird7980||The 60 is under the the rest of the number . What do you mean ch of 1.56|
|02-03-2013 01:33 PM|
I'd tend to agree w/BigEd36- Silvolite Pistons, bottom of the page. Two possibilities are shown, one has a 0.070" deep dish, the other a 0.080" dish. Both are available 0.060" over. The numbers shows up under "O.E. Casting No."
If these are original pistons, they should have a CH of 1.56". But if they're aftermarket replacements, they're prollably going to be the shorter rebuilder type.
|02-03-2013 12:26 PM|
|BigEd36||From searching online I can't find much about that casting number, but Silvolite shows a piston replacing that part number, it's either 11 or 13 cc dish piston, Silvolite's version is 1.54 compression height instead of the factory 1.56 so they would be considered "rebuilder" pistons that will give you .020" more "in the hole" or piston deck height than standard pistons. The 60 at the end of the number probably means they're .060" overbore sized.|
|02-03-2013 09:13 AM|
|vinniekq2||contact fbird88 I think he has used these pistons|
|02-03-2013 05:54 AM|
Gm piston number what does it mean
I have a gm piston. just try to figure out what the numbers on the bottom of the piston means 3991476 60 thanks.