No 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 12-16-2007, 10:12 AM
Compression Ignition Addict
 

Join Date: Oct 2007
Location: Birchwood, TN
Posts: 854
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Send a message via AIM to Tikal
No boost?

Hey guys I just installed my boost & pyro guage this weekend. I took'r for a test drive and noticed I'm not building ANY boost until around 1.5-2k/rpm. At 3k/rpm I'm only boosting around 8-10psi.

My exhaust is cutoff about 12in. past the downpipe. Could the lack of back pressure have any effects?

I hear a ticking around the driver's side when I put the engine under a load. Could the exhaust leak effect my boost this much?

Neither of the intake boots appear to be dry-rotted but I haven't ruled them out.

Anyone clue me in as to what is normal and when I should be boosting x/psi @ y/rpm's?


Thanks guys!
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old 12-17-2007, 04:06 PM
Compression Ignition Addict
 

Join Date: Oct 2007
Location: Birchwood, TN
Posts: 854
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Send a message via AIM to Tikal

Reply With Quote Quick reply to this message
  #3  
Old 12-17-2007, 04:27 PM
Compression Ignition Addict
 

Join Date: Jul 2007
Posts: 407
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Send a message via AIM to tonypagnano
my guess is you pinched the boost line? i would start by tracing from the gauge to the fitting where its connected. if its pinched u can get a whole new line with fittings for about 6$ at a napa or autozone or store like that, or u can buy compression fittings for about a buck. This happend to my truck and my buddys cummins. so check the line and hopefully thats what it is.
Reply With Quote Quick reply to this message
  #4  
Old 12-17-2007, 05:46 PM
BIG TRUCK, SMALL DRIVER
 

Join Date: Oct 2006
Location: Iva, SC
Posts: 5,877
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
You will only see boost at higher rpm and under load. The RPM you stated seems right. If you can hit between 10 and 15 psi when you hammer on it, you should be good. You will not see much more than that until you add a chip or programmer.

The lack of backpressure, in my experiences, causes the turbo to take longer to spool. The OBS trucks are so under powered and have such a large turbine housing, the backpressure actually helps on the bottom end. When you add a chip, the extra fuel will overcome the need for backpressure. I saw a 200 RPM decrease in spool up on my truck by when I went to straight pipe.

Last edited by pipelayerjdh; 12-17-2007 at 05:52 PM.
Reply With Quote Quick reply to this message
  #5  
Old 12-18-2007, 11:18 AM
Compression Ignition Addict
 

Join Date: Oct 2007
Location: Birchwood, TN
Posts: 854
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Send a message via AIM to Tikal
Thanks for the help guys! ;D
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 11:04 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