'These are Russ's Racetec pistons with a 9.4CR ......'
Thanks for the pic. I am wondering on the 9.4 CR. I think that is what mine is setup for. I had Russ set mine up for pump gas and a CI head, he ported. I think your has an Eddelbrock aluminum head. I would have expected a higher CR. I'll have to order one of the Summit piston ring compressors. I hear the solid type reduce the chance of the rings scoring the cylinder bores.
Thanks for the pic. I am wondering on the 9.4 CR. I think that is what mine is setup for. I had Russ set mine up for pump gas and a CI head, he ported. I think your has an Eddelbrock aluminum head. I would have expected a higher CR. I'll have to order one of the Summit piston ring compressors. I hear the solid type reduce the chance of the rings scoring the cylinder bores.