Ist n bischn OT aber egal...
1 stunde damit bis 3/4 gas durch die gegend zu fahren
mal zu dem ewigen thema einfahren : quelle:
in kurz, entgraten und dann feuer frei! fliegt er dir bei vollgas um die ohren wäre er es auch nach 500km beim ersten mal vollgas...
für die, die der englischen sprache mächtig sind
:
what's the best way to break-in a new engine ??
the short answer: run it hard !
why ??
nowadays, the piston ring seal is really what the break in process is all about.
contrary to popular belief, piston rings don't seal the combustion
pressure by spring tension. ring tension is necessary only to
"scrape" the oil to prevent it from entering the combustion
chamber.
if you think about it, the ring exerts maybe 5-10 lbs of spring tension
against the cylinder wall ...
how can such a small amount of spring tension seal against thousands
of psi (pounds per square inch) of combustion pressure ??
of course it can't.
how do rings seal against tremendous combustion pressure ??
from the actual gas pressure itself
!! it passes over the top of
the ring, and gets behind it to force it outward against the cylinder wall.
the problem is that new rings are far from perfect and they must be worn
in quite a bit in order to completely seal all the way around the bore. if
the gas pressure is strong enough during the engine's first miles of
operation (open that throttle !!!), then the
entire ring will wear into the cylinder surface, to seal the combustion pressure as well as possible.
the problem with "easy break
in" ...
the honed crosshatch pattern in the cylinder bore acts
like a file to allow the rings to wear. the rings quickly wear down the
"peaks" of this roughness, regardless of how hard the engine is run.
there's a very small window of opportunity to
get the rings to seal really well ... the first 20 miles !!
if the rings aren't forced against the walls soon enough, they'll use up the roughness
before they fully seat. once that happens there is no solution but to re
hone the cylinders, install new rings and start over again.