Piston identification
08-01-2008, 09:28 PM
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Piston identification Hello fellas,
I am having some issues trying to identify some small block Chevy pistons. Heres what I know. They measured 4.013" on the biggest area of the skirt, they are high dome (pretty sure 11:1) The problem is the dimention from the top of the flat area on the top of the piston to the centerline of the wrist pin measured 1.850" (with dial calipers.)
I bought these and was told that they are for a 327 with a 5.7 rod.
If this is so, the piston to pin dimension should be 1.675" and a 350 would be 1.550". So the pistons I have should not be either one of those. Even 6" rod pistons would have a smaller dimension yet.
My question to this is if my pistons have a 1.850" dimention, then what the heck kind of engine are these for?
I was told that they are Manley brand. Very little skirt area and quite a bit of milling inside and around the skirt. They are also gas ported (.050" holes drilled on the top of the piston over the compression ring.) Maybe a 302?
Any input would be appreciated.
Thanks
I am having some issues trying to identify some small block Chevy pistons. Heres what I know. They measured 4.013" on the biggest area of the skirt, they are high dome (pretty sure 11:1) The problem is the dimention from the top of the flat area on the top of the piston to the centerline of the wrist pin measured 1.850" (with dial calipers.)
I bought these and was told that they are for a 327 with a 5.7 rod.
If this is so, the piston to pin dimension should be 1.675" and a 350 would be 1.550". So the pistons I have should not be either one of those. Even 6" rod pistons would have a smaller dimension yet.
My question to this is if my pistons have a 1.850" dimention, then what the heck kind of engine are these for?
I was told that they are Manley brand. Very little skirt area and quite a bit of milling inside and around the skirt. They are also gas ported (.050" holes drilled on the top of the piston over the compression ring.) Maybe a 302? Any input would be appreciated.
Thanks
08-02-2008, 04:06 PM
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I did talk to one guy and his thoughts were that these would fit a 302 with a slight offset ground in the crank and the rod length was not mentioned. Has anyone came across anything like this??? Check out the photos.
Thanks!
Thanks!
Last edited by tjello327; 08-09-2008 at 08:27 PM.
08-04-2008, 12:47 AM
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Well by the pics I would have to say those are bigger than 11:1 pistons. Also that seems like a pretty big compression height unless it was a 302 with some pretty short rods. Unfortunately it is pretty late and I am not at my shop but I have a factory DZ stamped 302. It had 13:1 domes and 6 inch Mickey Thompson aluminum rods. I will post some pics tomorrow of the rods and pistons so you can compare the domes and compression heights of the pistons and see the rods they were on.
Chris
Chris
