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olds97_lss said:The WOT method isn't what you'd think unless I'm mistaken. I watched a airplane video when I was at a LHS as a guy was breaking in a OS 2 stroke plane engine. On a stand, with a prop (load) and running rich, it was running at WOT, but wasn't hitting "peak" RPM's due to the richness and the load the prop was putting on it. The engine got up to around 210 within the first tank with all the air the prop was pushing over the engine. Then he'd shut it down, put the piston at BDC and let it cool. He did this about 10 times, each time tuning it for performance a bit, then installed it in a plane.
I'm not saying I'd ever do it, but it was interesting to see it work.
rbmaxxbasher said:everyone just cool down a second an read.
heat cycle is the method suggested by almost every engine manufaturer I've seen.
There is no way you are going to convince me that breaking in at wide open throttle is the way to do it. Not when I spend my $250 on an engine.
Secondly, When an Engine is broken in the actual process that is taking place is that the moving parts are being worn-in. Meaning that the piston is not exact, the sleeve is not exact, and the crankshaft is not exact. Running in at low load makes up for the minute lacks in precision.
Consequently, during a break in, while seating seals and making things exact (or as close as possible.) it is not a good idea to wide open the thing, especially under no load. Some engines can take it. High Dollar engines. When your talking about a regular engine $200 or so, if you break in an engine like that, it will almost certainly break the con-rod. Then if you send it to, well O.S. in this case, they will tell you that it was the break in procedure and it wasn't their fault.
The fact is: all engines wear. If you take good care of it, clean it, keep it a little rich, and break it in properly, it will deliver good performance for a given period of time.
Bouzouki said:I take back what I said before, the heat cycle method is good but WOT from the begging for 3 straight tanks is the best way to go.
Bouzouki said:I did it on a $350 engine
RatzoRC said:I must apologize.
I thought you were giving fake instructions on how to kill the engine as a joke.
I honestly didn't read it as serious.
olds97_lss said:Have you done it on a $100-$200 engine? Not provoking, just curious if you have to see what the end results were like. Good power, long life...