OST-017: Ed Sullivan it ain't!

[oldeskewltoy]

Been a while... sorry. As I've said a few times, this is my first O/S valve head, and since I was using a cutting bit inside the bowls for the first time, I've been focusing on getting it right.....

A fond photo... now part of a 3 panel



see how things have changed even more


So, here are the four O/S exhaust ports... in order(#1 on left, 4 on right)



The obvious signs this is an O/S valve head... the thinned splitter, and the ample volume to flow past the guide, what you can't see from this perspective is the ample room on the other side of the guide as well.


So, since those don't show it all, here is a view @ a single bowl...



:eek:

Another view... this time a 3 panel of the progression of exhaust port #3


focus on the splitter and watch as it changes based on need



Now for a unique 2 panel... the top half of the photo below is above... the bottom half is the updated photo showing the bowl work complete. The lower view was mirror imaged to show port to port comparison




Finally... for those who have been following my work... I often show how the head can "bend light"... No added light to the following photo... no camera tricks... the ports take the available light and direct it out of the head




Cams are being built as I write this... The Kelfords were not available, so we went with a Web grind not known in these parts (these parts = 98% of 4AG users....)

Web
Intake - #797 Valve lift .410 (10.410 mm), Duration Adv 297°, Duration @.040 (1 mm) 259°
Exhaust - #1043 Valve lift .400 (10.160 mm), Duration Adv 300°, Duration @.040 (1 mm) 250°

Once the cams arrive, the bucket cradles will be machined for clearance. And then the head goes back to Loynings to have the seats machined, and check the valves for valve to valve interference.........

much more to come.......