Help me decipher my AE results on manifold/exhaust pressures. Don't think their good - Ford Powerstroke Diesel Forum
User Tag List

 
LinkBack Thread Tools Display Modes
post #1 of 3 Old 10-21-2013, 02:39 PM Thread Starter
Member
 
Join Date: Oct 2013
Location: Northglenn
Posts: 84
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Help me decipher my AE results on manifold/exhaust pressures. Don't think their good

So I have ran through multiple tests on my pickup using my new to me AE and the one that is throwing me for a loop on interpretation is the trifecta of Manifold absolute pressure/Exhaust back pressure and Barometric pressure volts especially in relation to my altitude here in Denver. At idle of 683 rpm my Manifold absolute prissure is 12.10 and Exhaust back pressure is 12.94 with barometric volts of 3.74.

At 1823 rpm
MAP is 15.50
EBP is 18.41
BPV is 3.75

At 2952 rpm (not floored but heavy acceleration up a hill)
MAP is 29.90
EBP is 43.46
BPV is 3.73

A second blip on the pedal at 2976 gave me
MAP is 30.40
EBP is 44.33
BPV is 3.74

Is this too much of a spread between map and ebp?
I am at 5280 feet and have no muffler/CAT and just straight pipes. I am having a hard time figuring these. I took a recording of this session and don't know if I need to post it or if the above numbers are enough.
Tdog77 is offline  
post #2 of 3 Old 10-22-2013, 11:50 AM
Compression Ignition Addict
 
timmyboy76's Avatar
 
Join Date: Aug 2010
Posts: 1,891
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Thanks: 0
Thanked 20 Times in 20 Posts
Feedback Score: 0 reviews
mind you, if im not mistaking, MAP see's 14.7 value, at idle/not running....so, doingthe math, your boost is right. And also, i'm thinking, the backpressure should be 1-1 as well...

99.5 x-cab 7.3l, 6spd, 161k miles.....
timmyboy76 is offline  
post #3 of 3 Old 10-29-2013, 04:48 PM
Winning DUHHH


 
Young-SC-Owner's Avatar
 
Join Date: Sep 2010
Location: Sunrise Beach, MO
Posts: 2,389
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 8 Post(s)
Thanks: 0
Thanked 12 Times in 12 Posts
Feedback Score: 0 reviews
Should be close to 1-1 but wont be exactly

99.5 F-350 SRW Short Bed, Ex Cab.
6637
Wicked Wheel'd,
Southbend
Autometer - Boost, Pyro
TW 6 Pos Chip
Water/Meth Inj
Diamond Eye 4" TB

7 year Veteran with SBFD
Airframe and Powerplant Mechanic
Head Marine Technician

Dont Tread on Me
Young-SC-Owner 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