EGT - Before or after the turbo?

[99Smokin73Stroker]

Well I wasn't really concerned about the shavings as I would go out of my way to make sure I got as much as I could out. But it was just the fact that a friend told me someone recommended he went after the turbo. I would like to go before the turbo on mine for the accuracy and that's likely what i'll end up doing, especially since the chip i'm running produces a lot of smoke when I crank it up for playtime....
Oh and about the pic it's no biggie, but if you can get one with enough light it might help me see where I should go with mine. Thanks!

[Fis Teck]

It's just as acccurate but is cooler by 200 to 250 drg. of cylender temp. It has one adantage over putting in the exhaust manifold if you have a problem on the other side you will never know. With it behind the turbo you get all the cylenders temp not just one bank.

[99Smokin73Stroker]

Well i'll defintely be buying guages in about 10 days at the Indy Jamboree so i'll ask the experts around there and see what they say!

[purduefarmboy460]

Anyone get anymore ideas supporting which place to put the probe. Gauges should be on the door step tomorrow, I'd hate to have to wait to install them I read on another site that there could possibly be a difference of over 300 degrees during WOT.....

[Oreo]

The most accurate placement is pre-turbo aka exhaust manifold. I did the A piller set of three. Boost, EGT and Trans. Installation wasn't hard just took quite a bit of time to get everything right and factory looking.

When you drill the exhaust manifold make sure you use sharp drill bits. TAKE YOUR TIME and start with a small bit. Once you get a pilot hole with the small bit step up to the next size. Yeah this takes longer to do but it helps to cut down on the shaving size and helps to cut a perfect hole for tapping. Once you have the hole ready for taping use a flexible magnet to clear any shavings from inside the manifold. Once you have cleared the shavings use a shop vac to pull any other shavings from in the manifold. (I did this several times).

Now tap the manifold and again clean the tapped hole with the magnet and vac. All is good from here.

If you have a truck with an automatic you can route the wires through the hole where the clutch cable would have been run. There is a large plug covering the hole (you can pull it off with out use of tools via the engine compartment) and you can drill the center and cut to the lower edge allowing easy threading of the wires plus you can pick up some wire loom from Radio Shack to protect then and seal the hole from the elements.

[purduefarmboy460]

I installed this weekend. I ended up putting the probe in the pipe, just after the manifold. It seems to work real well, but I'm not sure if there is a temp difference in that foot of space or not. It was much more relaxing to drill into a pipe then the manifold. just held a shop vac up to the drill as we went, and it caught all or most of the shavings.

[Andy]

So, the next question is, what is the max temp you want to it get to? Pre and Post Turbo.

[Ramsmoker]

Hope its not to late to throw my hat in the ring. I've been in heavy trucking all my life and my Cat and Cumapart engines havn't had the thermocouples in the exhaust manifolds since the mid sixties let alone has there been a gauge made since then with the warning colors marked for preturbo intallation. Maybe there is some new thinking that says its better. I don't remember exactly why, but there was a new way of thinking then that changed it from the manifold. It's all what you get used too. I have driven many miles in heavyhaul trucks that run at 90% to 100% all day long. You don't stare at any of the gauges all the time but rather scan them for abnormal changes. So lets say your pulling pretty hard and the temps are up there a bit, you don't want to look the gauge or gauges and have to add or subtract to be accurate while changing lanes looking for an exit or what have you. I can't think of anything that would out weigh one or the other. I've heard people say that with the thermcouple after the turbo you won't be able to tell if you blew an air charge hose off. I don't know anybody with a pyro and no boost gauge or the other way. In the large engines the turbos move so much air that they would have to blow a hose to raise the temp. noticably. And then you would have heard the loud noise and should have pulled over. On my powerstroke I don't even have a wastegate. I would think on our trucks you would notice lower boost and a strange noise from the engine bay. Bottom line, GET GAUGES, get familiar with them and what is normal. Keep your ears in tune when your work'n it. You can't go wrong.

[strokin' fool]

Hey Smokin', I just had my EGT installed pre turbo in the manifold. I had heard the same concerns from people about the metal left over getting into the turbo, but if you are careful, you will not have a problem. I called Banks and they said to put it pre-turbo. I got it installed about 2 months ago and have had no problems and it works great. It is nice to have, especially when towing.

[lilredpowerstroke]

So what should the max temp be before backin off the go-pedal? Pre and post turbo temps would be great.