Where To Install Egt Probe On Rb25det?

[Stronzo]

Hello,

What variants of EGT probe installation are possible for RB25DET? Those who have EGT gauges -- what readings do you have and what is location of EGT probe in your cars?

I just recieved my Greddy gauges and installed everything except EGT probe, i`m planning to do it this weekend. I know few loactions that EGT probe can be installed:

Before th turbocharger:

- Exhaust manifold runners junction (recommended by Greddy in the manual and also recommended by some tuners on the net for good accuracy)

- Exhaust manifold 5 or 6 cylinder runners as they must be the hottest as they are most far from the pump (am i right in this thinking?)

- Turbo housing, right after the junction with the exhaust manifold (also recommended by Greddy and some tuners)

After the turbo -- in the downpipe somewhere near O2 sensor. This way is not good as the temperature readings will be much (100-200 C) lower and also the gauge reaction will be slow.

The problem with the installation before the turbo is the sensor durability -- sometimes it burns out right into the turbo -- sure it will damage it.

So what location do recommend? What EGT readings do you have? What EGT is critical for RB25DET?

[TriniGT]

Was searching and came up on this, anyone have answers to this as I want to install my Defi EXT Sensor this weekend. How long will it last on the turbo housing?

[drpheel]

Some people tap into the exhaust manifold and monitor the temp from a specific cylinder and some people just tap it in the downpipe after the turbo. Im running it on my downpipe but the good way to do it is on the manifold. If you guys want a cheap solution for a nice 1/32 din EGT monitor check this out

http://auberins.com/index.php?main_page=in...a1772e1c1835f38

[Mr. Untouchable]

just looking into the best way to go about this myself.

I've seen a few mounted close to the 02 sensor in the dump, but nissan mounts it just before the turbo flange on the rear side of the merging area. so its measuring numbers 4,5 & 6 mostly.

I'm thinking I should mount it in my merge collector but dont really know.

would like to hear some ideas from people who know more about it... please help tuners and guru's ha

cheers

[PM-R33]

Got mine after the dump, no way in hell im risking a long piece of metal snapping and going through the turbo. Most likely will never happen, but i personally didn't want to take the risk. Temps seem to still be fairly accurate.

[STATUS]

HAS to be pre turbo for accurate results, most stable position is about 1cm above turbo flange in exh housing. As you have only one DONT assume 5 and 6 are going to run hotest as it is not always the case.

[Mr. Untouchable]

arrrh rightio thanks for that Trent. i have a 25, pfc, 3540r etc on a xtr manifold 300 odd kw setup. i'm leaning towards mounting it in the merge collector, but how i'mportant is it? i know some cars run them in in the runners around a inch after the head flange in every runner. like the GT autosound s15 off the top of my head, thats with a motec m800 though.

does the pfc even measure it?

cheers