On board compressor used for 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 12-13-2012, 03:35 AM
Member
 

Join Date: Oct 2012
Posts: 53
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
On board compressor used for boost?

I am probably daydreaming about this idea but I would still like to share it. I have an early 99 manual 7.3 with a ts chip, 4" straight pipe, and k&n cai. The turbo lag is unbelievable and I can barely hit 23 psi.

Would it be possible to use an on board engine driven (or electric) compressor to fill a tank and route a line to the engine?

I know it would be impossible for it to keep up and feed the engine constantly, but if a regulator could be set for 10-15 psi during the times of no boost and assist in spooling up the turbo it could give more power at low rpm.

There would be obvious times where you wouldn't want the extra boost (idle or cruise) so it would be activated somehow by the waste gate position. (I dont know exactly how the 7.3 waste gate works but i work on aircraft and some use a throttle linkage to control the waste gate position, so maybe activate the compressed air by throttle position)

I'm probably missing a big flaw or two but I still wanted to throw it out there.
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old 12-13-2012, 04:12 AM
Member
 

Join Date: Oct 2012
Posts: 53
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
I think I answered my own question by finding the flaw.
If air is injected into the intake pre-turbo the air will just come out of the airfilter and escape into the atmosphere and have no effect.
If the air is injected after the turbo such as the intercooler, the air will not only go into the engine but also overcome the turbo and go backwards thru the system. Thus causing a compressor stall and causing the power (exhaust) impeller to also stall, creating massive back pressure in the exhaust and blowing the engine.

Does this sound correct?
Reply With Quote Quick reply to this message
  #3  
Old 12-13-2012, 08:15 AM
Compression Ignition Addict
 

Join Date: Feb 2010
Location: Somewhere unknown, even to me
Posts: 749
Thanks: 2
Thanked 4 Times in 4 Posts
Feedback Score: 0 reviews
Your pressure, say 100 psi in a 3/4 in pipe/hose won't give desired boost pressure on a 3 inch intake. You kinda need to think about the cfm part of it.
Reply With Quote Quick reply to this message
  #4  
Old 12-13-2012, 10:44 AM
Powerstroke.org Rookie
 

Join Date: Oct 2012
Posts: 3
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
The CFM produced by turbo is dramaticlly higher than most compressor. For that kind of idea you would want a Blower run off a belt. This gets rid of turbo lag but is very un effecient in fuel usage compared to a turbo.
Now a dual turbo has been tried which gets rid of turbo lag. I think they run this on the new acert cat engines.
Also there is a aftermarket gadget you can get on ebay, which fools the computer, keeping the wastegate open slightly and gets rid of turbo lag.
Reply With Quote Quick reply to this message
  #5  
Old 12-13-2012, 11:34 PM
Compression Ignition Addict
 

Join Date: Sep 2011
Location: Denton, tx
Posts: 1,368
Thanks: 0
Thanked 15 Times in 12 Posts
Feedback Score: 1 reviews
Boost is a measure of restriction. The psi part of boost isn't what actually matters in making power, it's the cfm. You pack 1200cfm into the space where 600cfm was before the boost is going to be higher. A compressor would in no way flow enough cfm to make any difference.

And most of the stuff mentioned about getting rid of lag makes no sense at all. You can run a procharger feeding the turbo which gets rid of lag, you can also run compounds which can help reduce lag if everything is sized properly. On our trucks tho you need billet rods to run compounds.

Last edited by dentexpowerstroke; 12-13-2012 at 11:37 PM.
Reply With Quote Quick reply to this message
  #6  
Old 12-15-2012, 04:10 AM
Member
 

Join Date: Jan 2010
Posts: 82
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 1 reviews
It would be a lot more effective to figure out what is wrong with your turbo then to try and dump compressed air into it to help it spool.
Reply With Quote Quick reply to this message
  #7  
Old 12-15-2012, 07:42 AM
Compression Ignition Addict
 

Join Date: Jul 2009
Location: Pipestone, Mn
Posts: 479
Thanks: 1
Thanked 4 Times in 4 Posts
Feedback Score: 0 reviews
On the other hand it is too bad the we don't have more boost pressures. One could tee into, say, the map line and fill an air tank with a check valve inline to run train horns and such....
Reply With Quote Quick reply to this message
  #8  
Old 12-15-2012, 07:52 AM
Compression Ignition Addict
 

Join Date: Feb 2008
Posts: 7,606
Thanks: 56
Thanked 127 Times in 121 Posts
Feedback Score: 0 reviews
need a supercharger that switches to turbo like Gale Banks has set up for the Military it's for marine use and had terrible out of the hole issues so He added the switchable supercharger ..


Last edited by ZMANN; 12-15-2012 at 07:56 AM.
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 09:28 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