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Old Jul 15, 2004, 06:11 AM
Bo Gundersen
Guest
n/a Posts
Tuning Kyosho GX21R motor

Hiya

On our local off-road track the cars are almost exclusivly electric, but
me and a couple of guys decided to try something different and bought a
Kyosho Inferno 7.5 which comes with the (as I understand it) relative
new Kyosho GX21R engien.

And as you might expect, the three of us with very little experience in
tuning and ajusting nitro engies are having hell with these things...

So I was hoping that a more experienced person could try to describe in
a human readable and understandable way how to adjust and fine tune
these engiens? Something that I think the Kyosho manual fails to do.
I know that this is a fairly general question, but I hope you guys can help.

Thanks in advance!

--
Bo Gundersen
Old Jul 15, 2004, 08:11 AM
Bobby Shaftoe
Guest
n/a Posts
Re: Tuning Kyosho GX21R motor


"Bo Gundersen" <bg@nospam.dk> wrote in message
news:cd5ktg$1ko$1@news.net.uni-c.dk...
> On our local off-road track the cars are almost exclusivly electric, but
> me and a couple of guys decided to try something different and bought a
> Kyosho Inferno 7.5 which comes with the (as I understand it) relative
> new Kyosho GX21R engien.
>
> And as you might expect, the three of us with very little experience in
> tuning and ajusting nitro engies are having hell with these things...
>
> So I was hoping that a more experienced person could try to describe in
> a human readable and understandable way how to adjust and fine tune
> these engiens? Something that I think the Kyosho manual fails to do.
> I know that this is a fairly general question, but I hope you guys can

help.

http://www.rchobbies.org/cars_eng-tuning.htm is very good but in summary:

Get your engine running healthily and reliably blowing lots of lovely blue
smoke out of the exhaust. The top of the engine should be well below
boiling point so spit on the head and check bubbles don't form in the
liquid. Once it's running reliably like this start to tune the engine by
leaning the mixture out. Usually you turn the needles clockwise to lean the
mixture but check your engine documentation to be sure. Always tune the
high end needle first, once you're happy tune the low end. If you change
your high end you'll have to retune the low end.

Now, golden rules:

Never ever run your engine too lean for the conditions. This is BAD. The
engine may overheat, may starve of fuel and will not be lubricated properly.

If you can't see blue smoke coming out of the exhaust (when accelerating)
then the engine is running too lean. Enrichen the mixture according to your
documentation.

The carbs on nitro engines are very sensitive. 1/16th of a turn of the carb
needle can make the difference between a blown engine and optimum
performance. Be gentle and be careful

In my searching on the net I also came up with this URL:
http://www.radiocontrolzone.com/foru...play.php?f=310

It appears to be a bunch of forums dedicated to the various Kyosho vehicles.
Handy

HTH,
Bobby


 


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