Effects of overspeeding engines???

[unrealman]

what could eventually or suddenly happen to an engine that is oversped?? were taqlking gasoline engines here. THANX

[unrealman]

So you wouldn't reccomment stepping up the engine speed on my governor for my 6.5hp engine?

can quick increases be sufficeint? like revving it or maby periods of time sich at a min or so be okay?

[mousepotato]

hummm...CPU's = Hamsters (sometimes Rats)...
...Engines = ????.......("We can make him stronger, faster...")
Lol....more Fuel (air/gas/voltage)
...Cooling (shave it/add fans ect...)
...Traction (shoes/tires/RAM...)
...= More power (sometimes at the
cost of usefull life)

...nuttin worse than ridding along in your Hamtel & it stroking out on you & leave you stranded...that's why my other,older & only slightly tweeked Hamtel MMX 233 bored out to
266 CI (256RAM...I mean HP) ...
...anyone want to explain how to build a better Hamster???...hehehe...couldn't resist http://www.sysopt.com/forum/smile.gif http://www.sysopt.com/forum/smile.gif http://www.sysopt.com/forum/wink.gif http://www.sysopt.com/forum/smile.gif http://www.sysopt.com/forum/wink.gif ....lol

[Marty]

It depends on how fast you want to turn it. Most small engines can take some increase in govenor speed for extended periods. Most are set slower than need be in my opinion,especially lawnmowers,they are trying to keep blade speeds down I guess.
I have a 12 horse Kohler that I turned up and it seems like it has twice the power. As any engine goes if you run it too fast the rods big end will squeese together at the parting line and the resulting sharp edge of the bearing will scrape the oil off and the bearing will sieze and spin inside the rod. Also centrifical force increases at a square of rpm so that will limit rpm to weight and strength of rod and piston.

[Barney]

Engines, my favorite subject after computers. http://www.sysopt.com/forum/biggrin.gif

I have Puch Maxi moped (a model produced from around 1980~1990). It originally does 45kph (30mph) with a 12mm carb and 49.8cc cylinder. Mine does 90kph (about 55mph) with a 15mm carb and 70cc cylinder. The centrifugal clutch (sp?) has been made lighter to make more rpm. I have a Leo Vinci circuit exhaust for more compression. But I guess that information isn't very important, except that at runs @ 200% of the original speed. http://www.sysopt.com/forum/biggrin.gif

It needs a lot of maintenance and a bit more oil http://www.sysopt.com/forum/smile.gif . Every six months it needs a new piston ring, gearwheels, chain and some other stuff. If I wouldn't do that, well it could get dangerous. http://www.sysopt.com/forum/biggrin.gif http://www.sysopt.com/forum/wink.gif

But to get your lawnmower to run twice as fast, I doubt you will get there by just doing some serious mods, you'll need a bigger cylinder.

[plucky duck]

Now that's what I call overclockin/overcookin' eh Barney http://www.sysopt.com/forum/wink.gif hehe

Plucky

[Barney]

Overcookin', yep http://www.sysopt.com/forum/smile.gif . The engine is hot enough to cook an egg on after 100 meter. Suprisingly, it doesn't get any hotter than that. <IMG SRC="http://server2044.virtualave.net/r0nald/ubb/biggrin.gif" border=0>