bombebomb

I currently have these installed in a running lt1, however the domes were milled off before they were installed. I'm having trouble reassuring myself how to calculate piston cc now since the 3cc dome is gone. I don't even know if you can calculate it with the information I have on hand...

So, anyone have an idea on the current cc's since the dome is gone? I looked at other similar pistons and they were 5cc with two valve reliefs and flat tops however, again I have no idea if you can even compare them that way.

Hope someone can help, with the little information I have on hand.

Thanks!

http://www.summitracing.com/parts/je...09-8/overview/

Injuneer

If the piston started with a 3cc dome, and you milled them flat (no valve reliefs), the cc's would be "0". If they have valve reliefs, you have to cc them to determine the volume.

A dome is minus cc's, a valve relief or dish is plus cc's and a flat top is 0.

bombebomb

Thank you, I called the manufacturer, and had another opinion. It came to out to 5cc's after the valve reliefs (relatively large).

Thank you again

Injuneer

I don't know why the manufacturer would have a different opinion. I clearly stated that if they were truly flat and had no valve reliefs they would be 0. If you cut valve reliefs after removing the dome, I don't know how the manufacturer would know they are 5cc.

bombebomb

No difference in opinion, just different information. You stated that if it was a true flat top, then it would be 0 (which is true). The piston I have (in link) is a domed piston with two valve reliefs.

Again, thank you for chiming in