Curious about stock boost ... - Ford Powerstroke Diesel Forum
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 01-31-2014, 04:07 AM
Compression Ignition Addict
 

Join Date: Oct 2010
Location: Hollister, CA
Posts: 234
Thanks: 21
Thanked 3 Times in 2 Posts
Feedback Score: 0 reviews
Curious about stock boost ...

Hey Guys,

Well the first mod was to remove the AIH element, and plug it with a RiffRaff plug with 1/8 pipe port....So I would be ready for gauges later


I found this Old Autometer 'Blower' PSI guage from one of Father-n-Laws Mopar builds that was never used ....

Still in ratty box, labeled '89 !!

So I decided to run a line. (I ran it long, with excess tied away for a future use in pillars gauges) currently mounted under dash

I noticed this guage falls back (pegs) past the "0" mark, and as you slowly drive, is raises up to "0" then maxs at about 19.5/20 psi.

So considering how much the guage is past the "0", I'm assuming its not reading right ?

I'm not sure, this is why I ask ....


Stock truck with a downpipe is all.

Wondering if the guage is FuBaR ??

Or mabey i'ts because I'm used to all the gauges featured in the Fast n Furious movies that peg to max in the Civics ???

-
-
-



-
-



-
-

Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old 01-31-2014, 04:22 AM
Premium Member
 

Join Date: Jun 2012
Posts: 3,729
Thanks: 2
Thanked 20 Times in 20 Posts
Feedback Score: 0 reviews
Is there not an adjustment screw to allow you to set "0" with the engine at idle?
Reply With Quote Quick reply to this message
  #3  
Old 01-31-2014, 05:46 AM
Compression Ignition Addict
 

Join Date: Oct 2010
Location: Hollister, CA
Posts: 234
Thanks: 21
Thanked 3 Times in 2 Posts
Feedback Score: 0 reviews
Hmmm, I dont think so,

But ill check again.
Reply With Quote Quick reply to this message
  #4  
Old 01-31-2014, 05:50 AM
Chapter Director

 

Join Date: Aug 2012
Location: Davenport, IA
Posts: 2,804
Thanks: 4
Thanked 32 Times in 27 Posts
Feedback Score: 5 reviews
I think this is one of the biggest misconceptions about boost gauges. It is perfectly normal for it go below 0. Why you ask?? Well it has to do with altitude. Most good gauge maker SHOULD calibrate the gauge to 1 atm(sea level) just for consistencies sake but id guess most dont and are calibrated at whatever altitude their factory is at.

So if they set it at 0 psi at their altitude say 1000 ft above sea level and they ship it to you and you get it and open it at say 5000 ft above sea level your going to have less ambient air pressure at your altitude so the gauge reads slightly lower than 0 psi.

Some guys say its because a diesel creates a small vacuum at idle that is true for a N/A diesel, but thats incorrect for a turbo diesel. It doesnt create a vacuum it creates pressure because the turbo pushes the air into the intake but at idle its so little that it doesnt register on the needle until the boost starts to build.

So in short no the needle should read below the 0. Sorry for the long winded response but i see this misinfo every few months or so. As for an adjustment screw i doubt it ive never seen one on a gauge but ive never seen ever gauge out there.
Reply With Quote Quick reply to this message
  #5  
Old 01-31-2014, 06:21 AM
Compression Ignition Addict
 

Join Date: Oct 2010
Location: Hollister, CA
Posts: 234
Thanks: 21
Thanked 3 Times in 2 Posts
Feedback Score: 0 reviews
Ok, thanks guys ....

But ....


Does anyone know what the stock psi is/should be ?
Reply With Quote Quick reply to this message
  #6  
Old 01-31-2014, 06:29 AM
Chapter Director

 

Join Date: Aug 2012
Location: Davenport, IA
Posts: 2,804
Thanks: 4
Thanked 32 Times in 27 Posts
Feedback Score: 5 reviews
Quote:
Originally Posted by ChiefRocka View Post
Ok, thanks guys ....

But ....


Does anyone know what the stock psi is/should be ?
Your right on it, 202 psi is about what you can push out of a stock truck
Reply With Quote Quick reply to this message
  #7  
Old 01-31-2014, 05:12 PM
Compression Ignition Addict
 

Join Date: Oct 2011
Location: Chico, California
Posts: 3,124
Thanks: 13
Thanked 72 Times in 68 Posts
Feedback Score: 0 reviews
id say about 17 psi max stock tune with 4 inch exhaust and a better intake.

a truck with generic programmer 21-24 psi.

stock tune with riffraff billet, exhaust, intake, high flow exhaust outlet and red line unplugged i can get 26 psi
Reply With Quote Quick reply to this message
  #8  
Old 01-31-2014, 05:56 PM
Chapter Director

 

Join Date: Aug 2012
Location: Davenport, IA
Posts: 2,804
Thanks: 4
Thanked 32 Times in 27 Posts
Feedback Score: 5 reviews
Quote:
Originally Posted by blue99stroker View Post
id say about 17 psi max stock tune with 4 inch exhaust and a better intake.

a truck with generic programmer 21-24 psi.

stock tune with riffraff billet, exhaust, intake, high flow exhaust outlet and red line unplugged i can get 26 psi
I have no problem reaching 20+ in my stock tune going up a moderate hill thats before i unplugged the red tube too
Reply With Quote Quick reply to this message
  #9  
Old 01-31-2014, 08:06 PM
Compression Ignition Addict
 

Join Date: Oct 2008
Location: Abbotsford
Posts: 2,198
Thanks: 16
Thanked 83 Times in 77 Posts
Feedback Score: 0 reviews
I can hit 20psi with the stock tune as well.
Reply With Quote Quick reply to this message
  #10  
Old 02-02-2014, 11:33 AM
Compression Ignition Addict
 

Join Date: Oct 2013
Posts: 218
Thanks: 0
Thanked 2 Times in 2 Posts
Feedback Score: 0 reviews
Quote:
Originally Posted by Rammstein1224 View Post
I have no problem reaching 20+ in my stock tune going up a moderate hill thats before i unplugged the red tube too

What is this red tube and where is it? I can use all the boost i can get.
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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -8. The time now is 09:44 PM.


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