The .18tm is a great engine in the Revo, I run one in mine with the Trinity pipe & an 1/8th scale buggy filter setup....Thing is fast for sure, I run my slipper really loose to stop the constant wheelies I get but it'll still flip on it's lid from time to time....
As far as break in method, I did the Heat Cycle method on mine...Everyone says it's really better and gives more power and longer life span.
I've been running Traxxas top Fuel 20% but I'm switching to O'Donnels 30% as soon as I use the last bit of Traxxas 20% I have left....Should pull some more power out of it.