Why can't I mount my EGT probe........... - Ford Powerstroke Diesel Forum
User Tag List

Reply
 
LinkBack Thread Tools Display Modes
post #1 of 24 Old 11-04-2009, 03:28 AM Thread Starter
Powerstroke.org Rookie
 
in2b8u's Avatar
 
Join Date: Dec 2006
Location: Mountains of WV
Posts: 17
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Why can't I mount my EGT probe...........

On the downpipe? If there any reason that this should not be done. I know that a lot of OTR tractors do. Any input would be appreciated. Thanks in advance, db

Excessive intake of alcohol, as we know, kills brain cells. In this way, regular consumption of beer eliminates the weaker brain cells, making the brain a faster and more efficient machine. That's why you always feel smarter after a few beers."
in2b8u is offline  
post #2 of 24 Old 11-04-2009, 03:51 PM
Compression Ignition Addict
 
layson's Avatar
 
Join Date: Sep 2007
Posts: 3,644
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 46 Post(s)
Thanks: 34
Thanked 58 Times in 56 Posts
Feedback Score: 0 reviews
You will have no idea what your temps are pre-turbo or right at the manifold. That is the temp that matters, otherwise you are just guessing.

2001 - 14" OUO 525 - 38x15.5x20 Toyo & 20x12 Weld Cheyenne's. Hybrids, 38R, BTS, Spearco, Terminators..



Quote of the Day:
Quote:
Originally Posted by Mannysouza View Post
You will get some axle wrap with a heavy trailer, I can feel it when towing my gooseneck with some heavy equipment. My Deavers will wrap enough to make the tires rub the front of the rear fender well if I give it too much throttle on aceleration.
layson is offline  
post #3 of 24 Old 11-04-2009, 04:11 PM
Powerstroke.org Fanatic
 
texasaggiesrocks's Avatar
 
Join Date: Sep 2008
Location: College Station
Posts: 91
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Your EGT's are roughly 200 degrees less after your turbo but it varies on what your doing. Mounting it on the manifold or the up-pipe before your turbo is what you need to do to get readings that will matter to you.

2013 F-350 Fx4 King Ranch





**SOLD**
00' F-350
TW 6 pos chip
4'' straight pipe exhaust



texasaggiesrocks is offline  
post #4 of 24 Old 11-04-2009, 04:26 PM
Lifetime Premium Member
 
jbeasts10's Avatar
 
Join Date: Apr 2008
Posts: 6,100
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 1 Time in 1 Post
Feedback Score: 0 reviews
Mine is mounted in the DP.That is where the bung was welded from the factory.I just keep an eye on it when towing.I try not to get over 950* if I can help it.I figure at most ,it cant be more than 300* difference.Just my opinion.


2001 F250.Custom Tuned,Ball-Buster Turbo,5"Exhaust
ITP Reg.Return,TD Billet Converter,Built Tranny,Snow Meth/Water Stage 2..plus a few more things!!She will Hunt
jbeasts10 is offline  
post #5 of 24 Old 11-04-2009, 05:06 PM
Compression Ignition Addict
 
fallendown's Avatar
 
Join Date: Oct 2007
Location: Galveston Bay
Posts: 559
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
The "Banks" egt I had with my six gun on the 7.3 was in the down pipe. When I got a hold of banks they claimed it was calibrated for this position.

I got taken out by a Hyundai...it's not funny...now I look like Stump, but taller
fallendown is offline  
post #6 of 24 Old 11-04-2009, 05:08 PM
Compression Ignition Addict
 
choupique108's Avatar
 
Join Date: Jun 2008
Location: Lake Charles, Louisiana
Posts: 3,398
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 2 Times in 2 Posts
Feedback Score: 0 reviews
the manifold give you a more accurate reading. When its in the DP is gonna be about 200-300 degrees cooler vs. the manifold.

1997 Single Cab Dually, S366 w/ Irate mount and plenums, EFuel, Intercooler, P.I.S 175/80s, Corbeau seats w 08 console, 19.5s, 6637, Black Interior with swede headliner and visors, Custom badges, Flight Fab Traction Bars.
choupique108 is offline  
post #7 of 24 Old 11-05-2009, 06:32 AM
Compression Ignition Addict
 
superduty4x4's Avatar
 
Join Date: Nov 2007
Posts: 2,355
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 1 Time in 1 Post
Feedback Score: 0 reviews
Temps can be as much as 500 different between the manifold and down pipe... RubberDuck (not sure if he's a member here) did some testing in his OBS while running a gauge in both spots.

97 F350 CCLB 4x4 PSD
superduty4x4 is offline  
post #8 of 24 Old 11-05-2009, 08:10 AM
Compression Ignition Addict
 
Join Date: Sep 2009
Posts: 480
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 1 Time in 1 Post
Feedback Score: 0 reviews
If you know the temperature difference between the location of the sensor and the manifold, wouldn't it be a matter of simple math to know what temperature it is at the manifold?
It would be a lot less risky to drill and tap at the down pipe for a DIY person doing it the first time.
mas360 is offline  
post #9 of 24 Old 11-05-2009, 10:00 AM
Serving Our Country!
 
scraph's Avatar
 
Join Date: Nov 2007
Location: Hernando, FL
Posts: 200
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 1 Time in 1 Post
Feedback Score: 0 reviews
The temperate difference between the downpipe and the pre-turbo location are not going to simply be a number that you "know". Not to go too deep into it ... but the temperature difference between the two locations is a dependent on both the differences in pressure and in heat content (enthalpy). Basically, the temperature difference between these locations is going to be a function of how much work the exhaust is doing on the turbine-end of the turbo ... as well as conductive heat losses through the plumbing on the way.

If the purpose of watching EGTs is to protect the turbo... then monitor upstream of the turbo. The amount of uncertainty of the relationship between EGTs upstream and downstream of the turbo is so large that monitoring it downstream would be unnecessarily limiting.

You might just end up ignoring the parameter in the end ... if you decide a "safe" number is 500 degrees difference but the truck isn't fast enough for you or can't tow long enough then you might just decide this week that 400 degrees is probably safe enough ... or 300 ... or you'll just drive it until it performs like you like and set the limit there.

2002 F-250 Lariat Extended Cab Long Bed, 7.3L, Auto, 4x4
- 6" BDS Suspension lift (All spring)
- 315/75R16 BFG A/Ts
- DP-Tuner F6
- DIESELSITE CPR Fuel System
- Turbo-Master Wastegate Controller
- Donaldson AIS Intake w/ "Zoodad" and AIH Delete
- MBRP 4" T304 Exhaust
- Coolant filter, Evans NPG+ Coolant, 203* Thermostat and Billet Housing
- Factory Tech Valve Body
- ISSPRO Gauges (Boost, Pyro, Trans)
scraph is offline  
post #10 of 24 Old 11-05-2009, 10:12 AM
Compression Ignition Addict
 
layson's Avatar
 
Join Date: Sep 2007
Posts: 3,644
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 46 Post(s)
Thanks: 34
Thanked 58 Times in 56 Posts
Feedback Score: 0 reviews
Quote:
Originally Posted by mas360 View Post
If you know the temperature difference between the location of the sensor and the manifold, wouldn't it be a matter of simple math to know what temperature it is at the manifold?
It would be a lot less risky to drill and tap at the down pipe for a DIY person doing it the first time.

I think it is pretty much worthless in the down pipe. It is easy to drill the manifold or up-pipes. How do you know the temperature difference between the two locations? Each truck is different. That is something I wouldn't guess on.

2001 - 14" OUO 525 - 38x15.5x20 Toyo & 20x12 Weld Cheyenne's. Hybrids, 38R, BTS, Spearco, Terminators..



Quote of the Day:
Quote:
Originally Posted by Mannysouza View Post
You will get some axle wrap with a heavy trailer, I can feel it when towing my gooseneck with some heavy equipment. My Deavers will wrap enough to make the tires rub the front of the rear fender well if I give it too much throttle on aceleration.
layson is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Ford Powerstroke Diesel Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome