Ferrea to Speedmaster exhaust valve test
A few of you guys sounded interested and I was curious so I flowed the exhaust on a ported exhaust port first with a Speedmaster valve then a Ferrea exhaust valve the customer wanted. After opening up the packaging on the Ferrea valve and compared it to the Speedmaster I got exactly what I expected, not much. Both valves are untouched. I should have started a new page as this is a little confusing. I check exhausts at every .100 not .050 because I’m most interested in airspeed and aim for 325fps in the port. I found 300-315 as I kinda expected because he didn’t want to lose compression so the chamber is totally untouched except for minor spark plug hole layback. Ok the Speedmaster valve is center page and the number at .500, .600, .700 is with a two inch pipe held up to the port exit. The far right two columns are the Ferrea exhaust valve. Not much difference but he wanted the security of a better valve.
A few of you guys sounded interested and I was curious so I flowed the exhaust on a ported exhaust port first with a Speedmaster valve then a Ferrea exhaust valve the customer wanted. After opening up the packaging on the Ferrea valve and compared it to the Speedmaster I got exactly what I expected, not much. Both valves are untouched. I should have started a new page as this is a little confusing. I check exhausts at every .100 not .050 because I’m most interested in airspeed and aim for 325fps in the port. I found 300-315 as I kinda expected because he didn’t want to lose compression so the chamber is totally untouched except for minor spark plug hole layback. Ok the Speedmaster valve is center page and the number at .500, .600, .700 is with a two inch pipe held up to the port exit. The far right two columns are the Ferrea exhaust valve. Not much difference but he wanted the security of a better valve.
