Mine says the same. I put mine pre turbo. He was just saying that people overanaylize this whole situation. He said he has seen people pull over just because they hit 1200*. All you have to do is let off your go pedal for a couple of seconds and ive noticed the temp drops 100*. I havent even got mine above 1000* even on my 100hp level. Havent tried the 140 yet

Yeah towing and running high egts for extended periods of time is no good. I think it was just that short term high egts that was being talked about.

I was just asking if anyone has seen a melted motor and not interperet in a different way.

btw what wire did you hook your ignition power for the pyro to? (so the gauge turns on when you turn the igniton on) thanks

 

POWERSTROKEME,

Diesel Manor has GREAT installation sheets with lots of pics . There's a black plug clipped to the top side of the fuse panel cover cross brace. Tap into the "Red with Yellow trace" wire for an "ignition on" source! If you've got a meter double check it. This is for the 7.3's, don't know 'bout 6.0's .....

 

Man this subject kills me when you guys say that post turbo readings are 300 degrees lower than pre turbo.Mine is post turbo and when at idle for extended periods my egt never go lower than about 225 before shutdown.Ive read posts here that say guys are shutting down at 300 pre turbo are you trying to tell me that my truck is at the 525 to 625 degrees at shut down.I just have a hard time believing this I think from what ive seen here on FTE that it is more like a 100 dgree difference.Can someone explain how they come up eith these numbers?

 

Yeah I looked at their site before I asked and I guess I didnt read well enough; I just remembered them saying a red wire on that harness. Well there were two red wires. I do have a tester but it wouldnt work...even changed the battery in it. thats besides the fact. Red with yellow got it! Thanks!

 

I'm with shaggy, does anyone have facts or just he said she said.

 

YES - someone on here DID HAVE both a pre- and post- turbo pyros hooked up at the same time. I forget who it was - but hopefully they will see this and post.

AND NO - it is not always a 300* difference - but at times it IS that different! That's just it - you are guessing, so to be safe, you have to go with that all the time, to make sure you aren't getting over 1250* pre-turbo!!

 

I hope the person that had both will post back but I bet if someone where to run both, and record them at all temp ranges what your going to find is not that there is a 300deg difference across the board but rather a percentage difference across the range, in other words 300 at top temp of say 1200 pre turbo will give 900 post and a 25% difference so at lower ranges say 300 pre turbo will equat to 225 post turbo. Hope that made sense but I am pretty sure that is what you will find to be pretty close to the truth in this.

 

Monsterbaby - Yea that was exactly what I was getting it - just couldn't get down it writing what I was thinking... That is a very good explanation of how I'd think it works between the 2 temps!

AND I would BET that the pre- and post- temps could even be different for different trucks, or even different mods!! That's just it - you just don't KNOW - all you have to go on is, from what someone else who actually DID run both, and what the difference was on their rig....

 

that would make great sense to me that it would be a percentage range.

 

Here's a few of the guys that have switched from post to pre have to say:

https://www.ford-trucks.com/forums/s...st#post2003228
https://www.ford-trucks.com/forums/s...st#post1758990
https://www.ford-trucks.com/forums/s...st#post1399875
https://www.ford-trucks.com/forums/s...st#post1372312

 

Your post and pre temps will vary with your exhuast, intake and turbo's. No to will run the exact same.
Shaggy, at idle your temp won't necessarly have a 300 degree drop because the turbo is not spinning fast enough. There ain't enough heat and flow in the exhuast to spin the turbo enough to use the heat. So your temp are normal, only on the highway or with a load on the engine will it there be a 300 degree difference. At idle the turbo is there, its not really doing any work.

 

Shaggy,

I had a 95 PSD with a post-turbo thermocouple and noticed that it took FOREVER for the EGT's to get low enough to want to shut down my engine. My 01 PSD with a pre-turbo mounted thermocouple takes all but a minute and a half to go from 600 to 250 degrees.

Here's my take on the subject:

1. The pre-turbo is going to react faster to temperature changes.
2. The pre-turbo is going to get hotter........quicker.
3. The pre-turbo will show a higher temperature. It won't be more accurate (degeree for degree), but it will show a better representation of combustion chamber temperature.
4. The pre-turbo will cool off faster as the exhaust gasses do not have to travel through [miles] of exhaust manifolds and up-pipes for the thermocouple to read.

5. The post-turbo will register more slowly to exhaust temperature changes.

6. The post-turbo will read in a lower range than a pre-turbo. For example, the pre-turbo will operate in the 200-1300+ range (depending on driver) while the post-turbo will read from 200-900 degrees to be safe.

7. As soon as the exhaust gasses can expand after they pass through the exhaust impeller in the turbo, they begin to cool. How much, I don't know. It will vary.

8. The post-turbo gauge reading will take longer to reach a lower temperature due to the fact that the exhaust manifolds, up-pipes, and the turbine housing remain very hot and the exhaust has to travel through all of it to reach the thermocouple.


Don't take this as gospel......just talking out of my....................

Cody