I've successfully broken in two engines with steel barrels. The shop that rebuilt my engine test ran it for about 15 minutes on a stand to ensure everything stayed together and temperatures and pressures were proper. The trick after that is to keep as high a manifold pressure as possible for the few hours needed for break-in. That means low altitude full throttle operation - in a coupe, it also means use a cruise prop so you can run full throttle. I basically stayed over flat territory near airports, just in case something let go. Even approaches should be made flat with power.
Ten hours and change the mineral oil and filter to single weight ashless dispersant oil - continue with the hard running for at least another ten hours. Don't be surprised if there is some metal in the oil with the first change, but only someone who's seen it before can really tell you if what you see is too much. After about twenty hours, you can return to normal operation. With O-470s I got 10 hours per quart consumption and long life using the above procedure, which was what was recommended by both the rebuilder and my mechanic. David N6359V Glen Ward wrote: > > Hi, Well I am supposed to be getting my new ECI Classic Cast cylinder this > week. The ones I am getting are the all-new steel-barrel ones with new > pistons and rings. Everything that I ever read says to avoid ground running > one for more than a few minutes when breaking new or rebuilt cylinders in. Is > this true? I am a little nervous about heading right up into the wild blue > yonder with an engine with this much work done on it with only a few minutes > of running on there! I was thinking maybe 3-5 hours would be a good enough > ground run. Anybody have any experience with this? Glen Ward > > ____________________________________________________________________ > Get free email and a permanent address at http://www.netaddress.com/?N=1 > __________________________________________________________________________ ______ > To unsubscribe from this list please send mailto:[EMAIL PROTECTED] > _____________________________________________________________ > Want to find the best email lists? Check out the Topica 20! > http://www.topica.com/topica20 __________________________________________________________________________ ______ To unsubscribe from this list please send mailto:[EMAIL PROTECTED] _____________________________________________________________ Want to find the best email lists? Check out the Topica 20! http://www.topica.com/topica20
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