Thread: Discussion norvel .074 break in
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Old Oct 04, 2012, 07:01 AM
surfer_kris is offline
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The .074 might be mild compared to the .061, but compared to other engines it is not. The Norvel .074 needs to do above 17000rpm to be happy, that's my felling at least. The engine comes with three head shims and it will run fine like that on 10% nitro. There are many ways to run in an engine but I prefer to do it on the bench where everything is easily accessible. They can take some time to run in, but they are screamers from day one, in my experience.
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