OST-026: "My White Hatch"

[oldeskewltoy]

from another forum Wrote:Looks great, thanks for the pictures and the nice explanations!

I try... besides, I enjoy doing it

pack Wrote:Amazing work....

You make me blush...

Ivan141 Wrote:

Quote:Besides the bowl work... can anyone tell me what else I did that isn't inside the bowls?

I spot a deburred/smoothed edge to the sparkplug hole.

correct! You can see it again in chamber 4 below


And here are the short radius's of intake 4, as above... before on top





Besides the short radius's, I'm also working the intake ports themselves. intake port 4 in mid "excavation"






and after roughing to size... a bit more work left....







another OST 2 panel... 2 down... 2 to go





One of the problems with the 16V 4AGE design is the ports are horizontal. Being horizontal, the air/fuel charge must make a pretty significant turn to reach the back of the valve. In the diagram below you can see what I'm talking about



Both the newer 4AF/7AF port, and the Formula One port are NOT horizontal, this allows for more cylinder filling, and therefore more power potential.

I borrowed the 4AG part of that diagram, enlarged it, and in typical OST fashion I've created a 2 panel that hopefully will show why I work the port roof.... In essence, I've adjusted the port roof a few degrees, this will assist the air/fuel charge to have an easier time making the bend, because adjusting the port roof the way I have is allowing the air/fuel charge to have a shallower angle to get to the valve... only a few degrees... but it all helps!




Now, away from diagrams and to real life....








More to come......