Maximum4x4,,what are differences between readings at the same time with pre & post turbo temps,,? Is there a big difference ?

 

thank you so much and merry x mas. mike

 

thanks for the help

 

Post-turbo EGT can vary from 200-600 degrees lower than Pre-turbo EGT and the temp difference is not linear or fixed. Many factors effect the Post-turbo EGT.

Hope this helps

 

thank you and it does help

 

With monitoring the EGT's you are trying to protect the pistons! Pre turbo is where they are. The pistons and heads are going to be damaged before the turbo at these temps.

 

Thanks so much I"m trying to work my way throught figuring out how to communicate on the forum I am new at it and don't spend alot of time on the computer. I got 3 gauge pod from diesel manor and will be putting it in in a coulple of weeks when I get the time. I will send a picture of the truck with the new tires, lift and gauges when I figure out how to do that. LMAO!


Thank you!

 

Where do i need to connect my wires behind the lightswitch on my truck so my guages are only lit when the automatic lites kick on, now they only turn on when i turn the know all the way to the right, they wont run unless its in that position , i need help!

 

I used a wire on my dash to the left of the steering wheel. Mine has a blank cap on it for the adjustable pedals. My truck is an '06 so it might be different than yours though. If that doesn't work your going to have to either spend some time with a test light or, even easier, get a wiring diagram.

 

Read posts #5 and #9: https://www.ford-trucks.com/forums/5...rmocouple.html

I just installed my post turbo thermocouple yesterday. My pre turbo EGT and Boost guages have been functional for a couple years.

-Steve

 

We have some installation instructions on our site. They are very specific and detailed. Click on our Installation Sheets page.

You always want to put the pyro thermocouple pre-turbo. I did a little writeup on another site. Here it is:

Think of the turbocharger as a big heat sink. It's this large mass of thick metal. As hot gasses enter it, they cool because the turbo charger is cooler. If the gasses were for example 900 degrees in the exhaust manifold (pre-turbo) they would hit the turbo and cool because the turbo was cooler than 900 degrees. The gasses would exit the turbo anywhere between 850 and 600 degrees, depending on the temp of the turbo. Conversely, let’s say you were pulling a load up an incline on the highway for a long period of time. Your EGTs (Exhaust Gas Temperatures) in the manifold were at 1200 degrees. Over time this high temp would heat up the turbo. The metal of the turbo heats up to, lets say 900 degrees for example. You pull the truck over in a rest area to get a bite. With the truck idling your EGT’s are at 250-300 coming out of the cylinders in the exh. Manifold. These cool gasses go through that 900 degree turbo and come out hotter, say 500 degrees. If your pyrometer were monitoring Post-turbo temperatures (after the turbo in the down pipe) the pyro would read 500 whereas if it were pre-turbo it would read 300. Eventually these cool gasses will cool off the turbo, but it will take a while. The only reason to monitor temps post turbo is to give you a good idea when to shut off the truck. Ideally you want the turbo to be cool enough so that the oil around the turbo bearing will be able to protect it once the oil stops flowing. 350 is fine for most of today’s modern diesel motor oils. Monitoring your EGT's post turbo will do noting with regards to preventing a scortched piston. For that reason 98 percent of our customers choose a gauge kit where they will monitor temps pre-turbo.

As for the tap and bit. We started to carry them because so many of our customers had a difficult time finding them at their local hardware store. Most thermocouples and all boost gauge fittings are 1/8:NPT and require a size R drill bit (0.339"). A 21/64" bit is the closest fractional size to it.
If you have any

 

Your writeup is exactly why I installed both the pre and post turbo EGT guages/thermocouples.

I am quite surprised that more people don't do this. But so many seem to be more worried about transmission temperature. Ultimately they install the Boost, pre Turbo EGT, and Trans temp in a three guage pod.

Doesn't make sense to me.

-Steve

 

so if you are only going to do one pyro gauge, then do it pre turbo, but one that is post turbo is also good to do? what about if you aren't running a tuner or chip?
i am not doing a boost just because the factory one on the truck is accurate enough for me, but i do plan on the EGT pre turbo, transtemp, voltmeter. a fourth one could be a post turbo EGT someday.

 

Does anyone know if tapping the intake elbow will get rid of the needle flutter on a boost gauge? I had a set of autometer gauges installed today and they tapped into the map line and the needle flutters like crazy at anything over 10 psi. And if so, any recommendations on where to tap the Banks High-Ram intake for a 2004?

 

yes it will. this is where i put mine. check my gallery for a pic