Engine Compression Atmospheric pressure at sea level is approximately 14.7 psi. A 9:1 compression ratio cylinder is compressing the air and fuel mixture to about 132 psi at sea level (9x14.7=132.3 ...

Since every cylinder head is different, learning how to improve their airflow characteristics involves a lot of trial and error, not to mention countless hours on the flow bench and dyno to ...

According to Air Flow Research, bronze guides have a longer life expectancy than OEM guides, and will work better in low-lubrication, high-rpm situations. Minimum clearance between the valve stem and ...

What's more, engines don't run very well when valves don't seat. If you've decided to go with a mechanical camshaft, valve lash is 0.022-inch cold and 0.018-inch hot. Paint It Right ...