Mods and Turbo physics - Ford Powerstroke Diesel Forum
General Diesel Discussion Discuss everything else pertaining to Diesel Pickups.

Powerstroke.org is the premier Diesel Truck Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 10-10-2007, 08:38 PM
Powerstroke.org Fanatic
 

Join Date: Sep 2007
Location: Denver, CO
Posts: 125
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Send a message via MSN to Jetmek319 Send a message via Yahoo to Jetmek319
Question Mods and Turbo physics

Greetings Fellow Kerosene Sniffers!
I am getting ready to do a couple of upgrades to my '04 F250SD 6.0 and while I was planning out a course of action a couple of question popped into mind. I am going to be installing a MBRP turbo back 4" exhaust (haven't decided on the T304 or T409 SS yet) and an SCT Livewire with the EGT module. Here's where you get to go back to high school physics...

Various fluid and thermodynamic laws state that as the pressure drops so shall the temperature. No problem so far. Using these laws/theories and LOTS of help from my physics major buddy, we calculated that an average temperature drop, through a stock power curve, taken at the pressure wall at the turbine inlet to the turbine outlet was between 2-4 degrees Celsius (35.6 -39.2 F, minimum was 1.4C, max was 13.67C). All reasonable operating condition resulted in less than a 70 degree swing.

With that in mind here's the question... Is it reasonable, and safely accurate enough, to put the EGT probe in the down pipe just downstream of the turbo outlet? I would be much more accessible for maintenance, removal, installation and seem like a much safer installation. I would much rather have the metal shavings blow out the back, instaed of getting sucked through the turbo, and if not done correctly those taps are a bear to get when you break one in the manifold. It's cheaper and less difficult if you need to replace the downpipe after making a mistake!

Just a thought.....

Jetmek319
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old 10-10-2007, 08:58 PM
Compression Ignition Addict
 
Join Date: Mar 2007
Location: Pottstown, PA
Posts: 398
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
I know it very easy to tap the manifold, and tons of ppl do it w/o problems. Don't know for a fact but I have been told its 150-400 deg. F differnt in the downpipe. But I never knew anyone that had 2 pyros to prove it, just hearsay.
Reply With Quote Quick reply to this message
  #3  
Old 10-10-2007, 09:07 PM
Banned
 

Join Date: Jan 2006
Location: central coast, california
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
pressure in the Y pipes can be as much as 60PSI....pressure in a strait pipe might be 8.....

Temp differences are too great...ur theory is great..but numbers are not right....on average its a 200-250 degree difference..and i have seen that proven....
Reply With Quote Quick reply to this message
  #4  
Old 10-10-2007, 09:08 PM
Powerstroke.org Fanatic
 

Join Date: Sep 2007
Location: Denver, CO
Posts: 125
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Send a message via MSN to Jetmek319 Send a message via Yahoo to Jetmek319
I guess that would be the most accurate way to test it. May be experiment worthy... hmmmm.
Reply With Quote Quick reply to this message
  #5  
Old 10-11-2007, 04:47 AM
I don't know nuttin....

 

Join Date: Jul 2006
Location: Tuttle, OK
Posts: 17,149
Thanks: 0
Thanked 9 Times in 9 Posts
Feedback Score: 0 reviews
your downpipe would be much harder to tap for the probe, two thin.
Theres no maintenance needed on it in the future and if for any reason you need to take it out, its very accessible if you put it in the rear corner, driver side y-pipe.
Reply With Quote Quick reply to this message
  #6  
Old 10-11-2007, 05:02 AM
Compression Ignition Addict
 

Join Date: Oct 2007
Location: Liberty,In
Posts: 767
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
If you have seen in semi's all of the probes are in the turbo down pipes and have worked for years. But if you are building some serious hp then i would recomend in manifold. I know some even run 2 one ineach bank.
Reply With Quote Quick reply to this message
  #7  
Old 10-11-2007, 01:35 PM
Compression Ignition Addict
 

Join Date: Aug 2007
Location: central pennsylvania
Posts: 313
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
the tapping is not to difficult.. just take your time..
Reply With Quote Quick reply to this message
  #8  
Old 10-11-2007, 03:47 PM
Compression Ignition Addict
 

Join Date: Jun 2007
Location: Bucks County PA
Posts: 1,344
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
i am no mechanic, believe me, i've never even tapped anything before. "maintain" helped me with my install. he told me what to do and it was actually quite simple.
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
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:
If you do not want to register, fill this field only and the name will be used as user name for your post.
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:

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
Display Modes

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 On
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -8. The time now is 04:41 AM.


Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.1
Garage Plus, Vendor Tools vBulletin Plugins by Drive Thru Online, Inc.

vB.Sponsors