Well they are large piston engines, with what could be low tension rings. Ring flutter could be a limiting factor too.
Of course, if you're making more power, you need more cooling. I wonder how much power the heads can handle before they run out of cooling capacity. On Tue, May 7, 2013 at 9:32 AM, <brian.kraut at eamanufacturing.com> wrote: > That I what I understand also. I did a lot of research when I got my M1 > prop repitched to see what I wanted my RPM at. I don't remember all the > numbers exactly but I found that 3,200 RPM was safe with a wood prop with > no mods to the engine at all (with the corresponding increased wear as > Larry mentioned from more revs). Again, not sure if these numbers are > correct, but I remember that engines with modified valve trains were being > raced at something like 4,600 RPM and unmodified engines were being run up > to somewhere around 3,600 or 3,800. There is a lot of good information out > on the net on the O-200s if you look for it. > > -------- Original Message -------- > Subject: KR> 0=200 rpm limit > From: Larry&Sallie Flesner <flesner at frontier.com> > Date: Mon, May 06, 2013 3:14 pm > To: KRnet <krnet at list.krnet.org> > > At 01:49 PM 5/6/2013, you wrote: > >For the 0-200 what IS the limiting factor for rpm? With most road engines > >it's valve float. > >Thoughts? > ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ > > I've always heard it was valve float. Crank them up till you can't > get any more rpm and they race them all season like that. If you > have a need for that much more speed, simply set an earlier departure > time. :-) > > Larry Flesner > > > > _______________________________________________ > Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. > To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org > please see other KRnet info at http://www.krnet.org/info.html > see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change > options > > > _______________________________________________ > Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. > To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org > please see other KRnet info at http://www.krnet.org/info.html > see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change > options > >
