Help with identifying pistons, 7025p

I've looked for information on identifying these pistons but came up empty handed.
They are stamped 7025p, have a 2.050" compression height not including the dome, the dome is another .025".
I've tried Speed Pro and TRW websites and couldn't find anything.
I'd like to find the compression ratio of them if possible. Can anyone help or lead me to a website for information?
Thanks,
Dave

Top.

Speed pro?

Definitely speed-pro about 20 yrs. old, crossover to L2295F. If the dome is at 0.025" it's been cut down.

Randy

Thanks for the help. I don't think the dome has been cut down since the 7025p is still visible on top. I know they are at least from the mid '80's according to a previous owner of the car.

.025 dome or a .250 dome? looks kinda tall for .025.

Looking at the pics again, I think you're right. I can see the 060 in the carbon in pic #2 and according to the specs. page in my catalog it should have a 0.125" dome which looks about right.(comparing dome ht. to ring groove thickness)

Randy

You're right, my fault. I said .025" dome but it is a .125" dome.

2.050" compression height plus .125" dome.
Does this seem to be 12.5 to 1 like the previous owner said? Sounds like we're getting closer to identifying them.

Book says 11.9 with 85cc head. 0.022" gasket and 0.020" deck clearance. Piston also weighs 815gr. without the pin.

Randy