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Hey Bill, it's been a while. So, in essense you should be able to negate the issue via intake and exhaust lengths. Sorta like a 2 stroke.. do we have any data to show exactly what that would be or is this more of a guess number? I remember Ed doing a trial w/ a variable length intake to solve this question but I don't remember the results. If a person could make it work it'd sure help I'm sure. Also, has anyone ever done anything like Kent Paser did w/ his Mustang II exhaust? [He wrote the book "Speed with Economy"] He put small cones in the end of the exhaust which bolted up to the block. The exhaust ran through these but because of their shape they would not allow a reflected wave to re-enter the port, this created a lower pressure exhaust which scavenged the cylinder better. He's flying w/ a 0-320 but the theory might work w/ a 13b?
The Mill is coming along very well. I took the time to add a movable console on a track, mounted on the side of the machine. This will allow me to traverse the console down the length and save walking 30+ft each time I want to touch off a part. The wiring is done, w/ the exception of the 240vac plug on the end of the power cable [I couldn't find it last night at 11pm] and the limit switchs, which have the wire run, I just need to mount the switchs and wire them into the control [12 wires to connect ttl]
I've had it running but took it down to install the console. [which took about 4 months longer than I planned.] As always, time is in short supply in the summer, I'm still working two jobs and getting ready for a new addition to the family in a month here so things just take longer than planned. Anyway I'm still working on getting a website up.. the last guy who was going to do it for me bailed so.. gotta find someone else :-) All in all.. I'm happy w/ it.. I just can't wait to start making parts w/ it.. d:-)
Best
Jarrett
Hi Jarrett,
How's the "big machine" install coming along? The key to the overlap problem is proper exhaust tuning. If the out flow of the exhaust is adaquate there will be very little cross flow. In fact the outflow can assist the intake. My "best" system would be direct injected so there wouldn't be any fuel in the intake charge.
Bill Jepson
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