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Old 02-13-2013, 07:52 AM
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Lets talk egt

Hello all,
I'm new to the forum and just bought my first powerstroke. It's a 2002 f250 cc sb and it has 147k miles on it. It's completely bone stock and I want to add a mild tune to it. I have riffraffs 6637 intake coming and I'm about to put an Mbrp 5" exhaust system on it with a 4" downpipe. I'm gonna be going with a dp infinity tuner with mild tunes as I know my truck has pmr's. so my question why can't I put the egt probe in the downpipe? I don't want to drill into my manifold and get shavings in my turbo when I can drill and tap the downpipe when it's off the truck an I can clean it out real good after.

The point of an egt probe is to give warning signs that there's something going on and the engine is running too hot. So couldn't I read for example 700* in the downpipe all the time and then if it ever goes up to 800-900* be enough warning that something's wrong? I don't plan on beating the crap out of my truck and ill only be pulling a 28ft enclosed snowmobile trailer. A guy I work has a ts chip with tw tunes and a 4" Mbrp turbo back and doesn't run an egt and he horses his truck pretty good and is fine (2003 7.3) so as long as I have some sort of detection won't I be fine? My snowmobile has it's egt in the muffler after the y-pipe and the expansion chamber and it's always been fine. Just curious as to why I shouldn't run the egt in the downpipe.

Thanks for any input
Tom
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Old 02-13-2013, 08:58 AM
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You are wanting the most accurate reading possible (so as to quickly prevent damage in an instant if needed). Never assume your EGTs are like your friends at work (even though I personally think its irresponsible to run a tune without monitoring the essentials) or anybody elses. Every truck is different and there are too many variables to account for. EGTs will be more accurate on the manifold vs after the turbo (where heat has had the chance to dissipate however slightly).

If youre worried about metal shavings, you can use a telescoping magnet although when drilling, the shavings will fall (on your face so wear eye protection).

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Old 02-13-2013, 10:15 AM
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Re: Lets talk egt

700 in dp could be 1300 or more in manifold

I made my Samsung SGH-I997 send this.
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Old 02-13-2013, 11:04 AM
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The shavings thing is way overrated. Just tap it vacuum it and call it good.
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Old 02-13-2013, 12:09 PM
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But if I'm not trying to make a ton of horse power or racing with my truck and just using it as a daily driver and occasional trips wouldn't the downpipe be fine? I guess I hear people saying the reason to have an egt gauge is because they're pushing thier trucks or towing heavy loads. I will put it in manifold if its a must but I'd rather do it in the downpipe.


Thanks-Tom
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Old 02-13-2013, 12:11 PM
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You want it in the manifold because you are trying to read cylinder temperature, not post turbo temperature. There can be anywhere from 200-400 degrees difference between the two.

Do not worry about shavings. It will be a very minimal amount, if any at all. If you are worried about it, you can vacuum the hole out after you drill it.

Let me know if you have any other questions about the Infinity. I am sure you will be exceptionally happy with it.
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Old 02-13-2013, 01:17 PM
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Re: Lets talk egt

Do what you want, risk what you will

I made my Samsung SGH-I997 send this.
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Old 02-14-2013, 09:29 AM
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Quote:
Originally Posted by 7.3Lariat View Post
The shavings thing is way overrated. Just tap it vacuum it and call it good.
That is A1 quotable material!
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Old 02-14-2013, 09:56 AM
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Best way I herd it put was....unless you live in reverse gravity the shaving wont fall up... manifold is lower than turbo drill-tap-use oil/magnet done...also tell your buddy he's not to smart running with no guages...

On a side note get a trans temp too if its auto
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Old 02-14-2013, 10:54 AM
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Quote:
Originally Posted by dannanw View Post
Best way I herd it put was....unless you live in reverse gravity the shaving wont fall up... manifold is lower than turbo drill-tap-use oil/magnet done...also tell your buddy he's not to smart running with no guages...

On a side note get a trans temp too if its auto
Our Infinity comes with that feature
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