The positioning of the EGT probes is fairly critical if you want accurate
readings but ultimately it probably dosent matter as they are normally used
for comparative purposes (ie: left side vs right side). I believe the
measurements are given in the Rotax manual.
If you do fit them either fit both on front manifolds or both on rear (not
one on the front and one on the rear), otherwise you will get different
readings.
I think from memory the front cylinders run hotter than the rear ones but
you might check on this. Its best to fit to the hottest ones.
Mine are secured with jubilee clips (sensors poking inside the holes in the
manifolds).
My engine is a basic 912, not a 912 S.
Hope this helps.
Carl Pattinson
G-LABS
----- Original Message -----
From: "Martin Tuck" <MJKTuck@cs.com>
Sent: Saturday, January 05, 2008 4:35 PM
Subject: Europa-List: Grand Rapids EIS 2004 (Rotax)
>
> Hi Folks,
>
> On the advice of some of you on this forum, I went with the Grand Rapids
> EIS for the Rotax 912 as part of my panel upgrade.
>
> A few questions though to those who have already fitted it.
>
> 1) Any problems I should look out for. Any gotchas?
>
> 2) It came with two EGT probes but nothing to say where they should be
> fitted. I assume you drill a hole in the exhaust manifold but where. Is it
> wise to drill holes in situ as swarf may end up in the exhaust valves.
> I've gone all this time with no EGT indication so I'm inclined not to fit
> these. What have others done?
>
> 3) It looks like you have to use GRT CHT probes (not supplied, Grrr). I
> thought the GRT website said the unit used the Rotax senders or maybe
> that's just oil temp and pressure senders?
>
> Any help would be appreciated.
>
> Regards,
> Martin Tuck
> Wichita, Kansas
>
>
>
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