I'm hopping up a 292 Y Block and have some questions. Stock Iron Heads. Ported.

2.02 Intake and 1.60 Exhaust. I'm looking at static compression ratio,

and dynamic compression ratio's and these are the numbers that I've calculated.

Let me know what you think:



Engine Bore Size: 3.830

Piston Stroke Length: 3.610

Head Gasket Bore Diameter: 3.937

Gasket Compressed Thickness: .047

Combustion Chamber CC's: 65

Piston Dome: 0 (I'd like to run the domed pistons, but I can't!) Piston Deck Clearance: 0

Intake valve closes at ABDC: 70 degrees

Altitude: 4500ft



Static Compression Ratio : 10.167

Dynamic Compression Ratio: 7.826



Obviously there are still a lot of things that I can do to tweak those numbers however I need to. But my concern is

that I'd like to get the dynamic compression ratio up a little bit

from that number. I know that detonation is a big concern. But, from

what I've read, detonation won't really come into play unless your

DCR is closer to 8.5:1 on iron heads. My target would be close to an 8.25:1 DCR. So, that being said, what are your thoughts on where I'm at.



I also am leaning more towards decreasing the squish area- just to enhance the detonation resistance of the motor. But, I'm still a novice and appreciate any of your insights.

Heber City, UT (15 mins outside of Park City- basically it's in the mountains)

55 Effie