I want to build a new CFC using slightly larger 1/2" OD tubing for the inner copper coil vs. the 3/8" OD the current one has. The reason for the change is that I would like to be able to pump at a higher flow rate when doing the recirculation Jamil method for crash cooling. The 3/8" is too restrictive IMO. It works, but could be faster. I do have some brewing buddies that have abandoned their CFC's in favor of IC's so opinions differ widely on which is the preferred method. I'm seeking the best of both designs in my next one.[/QUOTE]
Agreed. I guess going to 1/2" in the CFC would help your flow rate. I think this will be the way I go. I've read about wrapping the exterior of the pipe with solid copper wire to create turbulance. Not sure if it is worth the extra time. I'm about functionality, not over killing the build. I guess a CFC works well if your free of trub and can wirlpool well, or will it pass through the pump? Anyway, thanks for your input.