blow off valve reduce boost at speed? - Ford Powerstroke Diesel Forum
6.0L Performance Parts Discussion What has or has not worked for you?

Reply
 
LinkBack Thread Tools Display Modes
post #1 of 20 Old 05-09-2012, 01:17 PM Thread Starter
Powerstroke.org Rookie
 
Join Date: Feb 2011
Posts: 17
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
blow off valve reduce boost at speed?

ive been pondering the thought for awhile now about putting a blow off valve on the truck to see if at cruising speed ay 75mph i can lower the boost down around 4psi or even lower to help with fuel economy.

i know on my cars as long as u stay out the gas hard u can cruise with little to no boost at all.

i do realize the trucks are heavy ect.. but they still should make enough power NA to push its own *** once its up to speed without pulling......


has this been done or attempted yet ect...?
ALLIMPORT is offline  
post #2 of 20 Old 05-09-2012, 01:28 PM
Compression Ignition Addict
 
theswoleguy's Avatar
 
Join Date: Jul 2009
Posts: 471
Thanks: 3
Thanked 6 Times in 6 Posts
Mentioned: 0 Post(s)
Quoted: 6 Post(s)
Garage
Feedback Score: 0 reviews
no

first off there is no throttle body to create the vacuum you want to vent the BOV. And believe it or not the extra air is probably helping fuel as you are getting a more complete burn. Coming from someone who is huge turbo'd the truck out of boost at 75 is a dog and actually runs higher EGTs without the air.

i have tried this theory when i was stock turbo by flipping the smoke switch, which basically opens the turbo all the way up, and would drop psi as much as 6 psi cruising and had no improvement in mpg, made it harder to drive and smoked a hell of a lot unless you are going to reach up and keep flipping the switch on and off.

if you want fuel economy do the mods:
exhaust, egr delete, tunes and drive slower. these trucks start to drink fuel at 70+ sadly i drive like you as i live in atlanta and 285 means you get crushed if you do less than 70. but if i drop rpms below 2k and even around 1800 which is about 60-65 the mileage increase is surprising.

2005 F250 Fx4, Crew Cab, King Ranch
8" Procomp Lift w/ ext. reservoir shocks, Trac Bars, 22x14 Fuel Mavericks, 38x15.50 Fuel MTs, O-ringed heads w/ valve job, studded, 5" exhaust, Fass Ti w/ RR, XDP Sump, Coolant Filter, Singer 270Amp Alt, BPD 58v FICM, S&B Intake, Powermax, S&B intake Elbow, Snow WMI, ID Tunes, TSD tunes, PHP Ficm Programmer (Atlas 80 majority of the time), Mishimotor Radiator & Intercooler, BPD Water Pump, Gates HD Serp Belt, Flex-a-lite E-Fan Conversion
theswoleguy is offline  
post #3 of 20 Old 05-09-2012, 03:04 PM
Compression Ignition Addict
 
strokin6L's Avatar
 
Join Date: Apr 2011
Location: springville NY
Posts: 2,626
Thanks: 24
Thanked 54 Times in 49 Posts
Mentioned: 0 Post(s)
Quoted: 3 Post(s)
Feedback Score: 1 reviews
a BOV will only stop the surge(turbo fart) from when you suddenly let off the throttle...that's it.

2004 F-350 SC 4x4, XLT, 4" dual Magnaflow, AFE intake, No Limit piping, spearco intercooler, water injection, ARP studs, hypemax o-ringed heads, SCT tuned by Innovative Diesel, tuned FICM, Hellman's sump, FASS, Fuelab, regulated return, 190/75 injectors, KC/MTW 68 w/.72ar, suncoast trans w/billet input, edge insight CS with dakota digital gauges, amsoil by-pass, BD exhaust manifolds
strokin6L is offline  
post #4 of 20 Old 05-09-2012, 04:13 PM
Compression Ignition Addict
 
Join Date: Sep 2011
Posts: 314
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
why would you want to use less air at 75? the air from the turbo keeps you from chuggin the fuel right out your tank, i just got back from a 300 mile trip and i ran bout 8-11 psi at 75 and was running about 680-715 egts and got 18mpgs the best i have ever gotten

2007 lariat outlaw
ARP studs
egr delete
4inch mbrp
tunes from gearhead
atlas 40 ficm tune
zoodad mod
ccv reroute mod
strokedoutlaw is offline  
post #5 of 20 Old 05-09-2012, 04:33 PM
Compression Ignition Addict
 
pizza pig's Avatar
 
Join Date: Apr 2010
Posts: 2,044
Thanks: 0
Thanked 7 Times in 6 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Quote:
Originally Posted by ALLIMPORT View Post
ive been pondering the thought for awhile now about putting a blow off valve on the truck to see if at cruising speed ay 75mph i can lower the boost down around 4psi or even lower to help with fuel economy.

i know on my cars as long as u stay out the gas hard u can cruise with little to no boost at all.

i do realize the trucks are heavy ect.. but they still should make enough power NA to push its own *** once its up to speed without pulling......


has this been done or attempted yet ect...?
this is a diesel
pizza pig is offline  
post #6 of 20 Old 05-09-2012, 05:40 PM
Compression Ignition Addict
 
06powerstroke06's Avatar
 
Join Date: Apr 2009
Posts: 2,175
Thanks: 0
Thanked 2 Times in 2 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
diesel= more boost is better
06powerstroke06 is offline  
post #7 of 20 Old 05-09-2012, 06:33 PM
Compression Ignition Addict
 
F250SixOH's Avatar
 
Join Date: Nov 2011
Location: Concord, NC
Posts: 1,035
Thanks: 0
Thanked 15 Times in 13 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
BOOOOOSSSSSSSSTTTTTTTTT
F250SixOH is offline  
post #8 of 20 Old 05-10-2012, 04:06 AM Thread Starter
Powerstroke.org Rookie
 
Join Date: Feb 2011
Posts: 17
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
actually i always run at 80 mph.... as i drive about 1.5-3 hours a day sometimes the turnpike ..
i guess it could possibly work with a actual tuner on the truck so u can lower the fuel as the boost goes down .. but not so sure..

seems to get ok mileage.
i still get 4-5 days out of one tank & that includes city driving, just trying to squeeze little more out.

thx
ALLIMPORT is offline  
post #9 of 20 Old 05-10-2012, 05:48 AM
Compression Ignition Addict
 
strokin6L's Avatar
 
Join Date: Apr 2011
Location: springville NY
Posts: 2,626
Thanks: 24
Thanked 54 Times in 49 Posts
Mentioned: 0 Post(s)
Quoted: 3 Post(s)
Feedback Score: 1 reviews
Quote:
Originally Posted by ALLIMPORT View Post
actually i always run at 80 mph.... as i drive about 1.5-3 hours a day sometimes the turnpike ..
i guess it could possibly work with a actual tuner on the truck so u can lower the fuel as the boost goes down .. but not so sure..
seems to get ok mileage.
i still get 4-5 days out of one tank & that includes city driving, just trying to squeeze little more out.

thx
LOL...what? Please dont tell everyone that you actually think that a BOV works as a tuner. Do you have any clue what a BOV does or is suppose to do?

2004 F-350 SC 4x4, XLT, 4" dual Magnaflow, AFE intake, No Limit piping, spearco intercooler, water injection, ARP studs, hypemax o-ringed heads, SCT tuned by Innovative Diesel, tuned FICM, Hellman's sump, FASS, Fuelab, regulated return, 190/75 injectors, KC/MTW 68 w/.72ar, suncoast trans w/billet input, edge insight CS with dakota digital gauges, amsoil by-pass, BD exhaust manifolds
strokin6L is offline  
post #10 of 20 Old 05-10-2012, 06:28 AM
Compression Ignition Addict
 
06powerstroke06's Avatar
 
Join Date: Apr 2009
Posts: 2,175
Thanks: 0
Thanked 2 Times in 2 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Quote:
Originally Posted by ALLIMPORT View Post
actually i always run at 80 mph.... as i drive about 1.5-3 hours a day sometimes the turnpike ..
i guess it could possibly work with a actual tuner on the truck so u can lower the fuel as the boost goes down .. but not so sure..

seems to get ok mileage.
i still get 4-5 days out of one tank & that includes city driving, just trying to squeeze little more out.

thx


The more boost you have at speed means the harder the truck is working reducing the about of boost it sees will make the truck run with less air meaning it wont work as efficient. So the amount of boost is the effect not the cause. wanting to reduce the boost is not what you should be doing.

Also you will get the best mileage in your hottest tune. your truck will have more power so it works less to maintain your speed. It will also have lower boost (while at speed not WOT) in your hottest tune because it is working less.
06powerstroke06 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 On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome