It can be done either way.
Obviously the pre-turbo is going to be reading the actual temp of the
exhaust as it comes out of the exhaust ports ..and
gives  a faster more immediate reading in my experience.
Post turbo ..
perhaps 5 inches downstream ..
like it might read a couple hundred degrees F lower  there..
and it's sort of a 'softer' or more spread out reading ..

I saw egt specs for an AAZ engine somewhere once..
official vw specs..
it was so many degrees C measured so many millimeters after the turbo. fwiw.

either way works ..
just as long as you know how to make good use of the information you're
seeing.

----- Original Message -----
From: "David Beierl" <dbeierl@ATTGLOBAL.NET>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Sunday, July 10, 2011 11:38 AM
Subject: Re: Exhaust gas Temp gauge

> At 09:52 PM 7/9/2011, BenT Syncro wrote:
>>Curious if you installed your EGT probe pre or post turbo. It
>>appears from their website that Greaseworks installs theirs post turbo.
>
> From a non-expert standpoint that makes no sense to me as the temp
> would be reduced by a variable amount depending how hard the turbo is
> working.
>
> Yrs,
> d