Edelbrock Performer RPM (7577) and 360 Magnum CI heads

MechEngr said
Thanks for the caution. I did check the piston to deck height and the piston is .002" below the deck. The stock pistons were setting .060 below the deck and the calculated CR was around 8.8:1. I went to the KB-107 piston to increase the CR and was aiming for a calculated CR around 9.5:1. I believe that I'm now actually more like 10.5:1, which is a lot more than was expected.

I run my 11.1 compression 360 magnum on 93 pump gas.

MechEngr said
Thanks for the caution. I did check the piston to deck height and the piston is .002" below the deck. The stock pistons were setting .060 below the deck and the calculated CR was around 8.8:1. I went to the KB-107 piston to increase the CR and was aiming for a calculated CR around 9.5:1. I believe that I'm now actually more like 10.5:1, which is a lot more than was expected.

I have a build close to your engine. Mine is as follows
2000 360 magnum
Stock bore
KB107 pistons
Stock rods with ARP rod bolts
Stock crank
Comp 555 or 550 solid lift cam
Trickflow heads
Felpro 1008 head gaskets
Indy 360 magnum single plane intake drilled for LA bolt pattern.
Compression comes out to 11.1
I run and race the engine on 93 pump gas. When my friend had the engine with EQ heads he also raced it on 93 pump gas. I think you will be surprised how good these little magnum engines can run with a little compression added to them.