Boss: Critical speed in this case is mach .40 about 300 mph where the gas speed slows through drag/friction and heats the charge.
In 2.5 pipe this happens at around the 900 cfm mark and there aren't many 7M's flowing this.
Dave: Who's that?
Saw your post on SF.....
Velocity is King as it reduces "perceived lag"
2.5" has very good gas speed at the volumes the average 7M uses and isn't anywhere near reaching critical flow speeds.
Micky: I can machine the Rear Main Seal housing so the lip of the seal sits 1mm further back I did this on mine this time as the crank has the same groove.
I looked at a bunch of VMC's but couldn't justify 3 ton and 70K for a home machine ;)
No one in Australia brings my size machine in as a CNC so I had to build it myself and it's been a nice machine!
It will cut to 4 decimals but I don't really have any need to go that fine so keep to 3...
Allan: LOL My CNC thread was almost as big as my build thread here while I was doing the retrofit ;)!
I bought a brand new Bridgeport Clone and all the gear I needed then used my old manual Mill to convert the new one!
Mine Thermo Siphons after it's shut off through the Turbo water jackets you can hear the water moving around!
I guess if I shut it down and watched the temp gauge it'd rise.
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