To all who responded to my question: Thanks!
Shaun
A207
----- Original Message -----
From: "Fred Fillinger" <fillinger@ameritech.net>
Subject: Re: What Engine Instruments do you need/use on aRotax
914?
> Fully agree on 4 probes, as one tells ya' absolutely nuthin. However,
> on the Rotax where you can't adjust mixture, all EGT tells you is
> impending upper cylinder problems and importantly who's the culprit.
> Arguably nice to know, but the Rotax service record is excellent.
>
> Switching 4 EGT probes can degrade accuracy a lot, and 4-probe
> displays are very pricey. If one is handy with electronics, all you
> need are 4 little LCD 0-200mv display modules ($10-$25 a pop). Plus,
> they now sell high-temp thermocouple probes (c. $25) for digital
> multimeters that, with aid of a torch, you can calibrate and thus
> equalize the 4 modules. The absolute accuracy of any one cyl's
> reading is not as important as comparative temps.
>
> Regards,
> Fred F., A063
>
>
> Graham Singleton wrote:
> >
> > >CHT ( looks like 1 sensor on the standard installation. Anyone do
all 4?)
> > >EGT ( looks like 1 sensor/side. Aren't 4 needed?)
> >
> > I would strongly recommend 4 EGTs. They don't half dance about with
changes
> > in throttle setting. Probably due to the manifold/butterfly interaction.
It
> > may be less of a problem with the 914 because the inlet air temp will be
> > higher and help to evaporate the fuel droplets and distribut the fuel to
> > the cylinders in a less random manner.
> >
> > Graham.
>
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