Notices
6.4L Power Stroke Diesel Engine fitted to 2008 - 2010 F250, F350 and F450 pickup trucks and F350 + Cab Chassis

Boost numbers

Thread Tools
 
Search this Thread
 
Old Jun 28, 2007 | 08:20 PM
  #1  
powerstroked162's Avatar
powerstroked162
Thread Starter
|
Postmaster
Joined: Apr 2004
Posts: 3,658
Likes: 0
From: Ellensburg, Washington
Boost numbers

Does anybody know if the boost numbers seen in the cluster are total engine boost or are they the larger turbo's boost numbers? Where do they tap into for the gauge? Do these turbo's run wastegates? Im tryin to squeeze some more boost outta the turbinators before I use a tuner. Any input is appreciated

Cowboy Steve
 
Reply
Old Jun 28, 2007 | 08:31 PM
  #2  
blackhat620's Avatar
blackhat620
Postmaster
Joined: Dec 2003
Posts: 4,196
Likes: 10
From: Arizona
Those are actual boost numbers in the CAC tubes, and no there is no waste gate, with the VGT turbo a waste gate is not used. Only way to get more boost is to reprogram the PCM or replace the turbos.
 
Reply
Old Jun 28, 2007 | 08:39 PM
  #3  
powerstroked162's Avatar
powerstroked162
Thread Starter
|
Postmaster
Joined: Apr 2004
Posts: 3,658
Likes: 0
From: Ellensburg, Washington
I guess i didnt know that they were both VGT turbo's. Learn somethin new everyday. Thanks Blackhat!

Cowboy Steve
 
Reply
Old Jun 28, 2007 | 08:45 PM
  #4  
blackhat620's Avatar
blackhat620
Postmaster
Joined: Dec 2003
Posts: 4,196
Likes: 10
From: Arizona
Originally Posted by powerstroked162
I guess i didnt know that they were both VGT turbo's. Learn somethin new everyday. Thanks Blackhat!

Cowboy Steve
No the first turbo is a small fixed turbo and helps reduce turbo lag off the line, it is sequential with the larger VGT trubo, at low speed the VGT turbo is basically open and does not contribute any boost (this is an oversimplified statement) and as the speed and load increase the VGT vanes change the size and output of the VGT turbo increasing boost. As the engine slows when you lift off the throttle the VGT turbo vanes move effectively changing the size of the VGT turbo and reducing boost pressure. Because there is a VGT turbo in the system, a waste gate is not need to control and overboost situation.

Since a VGT turbo is controlled by the PCM, the only way to increase the boost output is to re-program the PCM. Also more boost is not beneficial unless you can also increase the fuel delivered to each cylinder.
 
Reply
Old Jun 28, 2007 | 08:55 PM
  #5  
powerstroked162's Avatar
powerstroked162
Thread Starter
|
Postmaster
Joined: Apr 2004
Posts: 3,658
Likes: 0
From: Ellensburg, Washington
Well I already have the fuel situation figured out. I know the "more air needs more fuel" situation but I didnt know what turbo situation i was workin with.

Theoretically I could mod the smaller turbine wheel and maybe housing to produce more air.= at lower boost. All things I will toy with in the near future. I am debating wether or not to go with the SCT or Superchips tuner.....Such a hard life, lol


Cowboy Steve
 
Reply




All times are GMT -5. The time now is 03:07 AM.

story-0
Top 10 Ford Truck Tragedies

Slideshow: Top 10 Ford truck tragedies.

By Joe Kucinski | 2026-05-18 19:34:33


VIEW MORE
story-1
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make

And it might be even better than that.

By Brett Foote | 2026-05-18 19:26:42


VIEW MORE
story-2
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!

Slideshow: Does lowering an F-150 Lobo RUIN the ride quality?

By Michael S. Palmer | 2026-05-18 19:20:37


VIEW MORE
story-3
Ford's 2001 Explorer Sportsman Concept Looks For a New Home

Slideshow: Ford's bizarre fishing-themed Explorer concept has resurfaced after spending decades largely forgotten.

By Verdad Gallardo | 2026-05-12 18:07:46


VIEW MORE
story-4
10 Best Ford Truck Engines We Miss the Most!

Slideshow: The 10 best Ford truck engines we miss the most.

By Joe Kucinski | 2026-05-12 13:09:47


VIEW MORE
story-5
2026 Shelby F-150 Off-Road: Better Than a Raptor R?

Slideshow: first look at the 810 hp 2026 Shelby F-150 Off-Road!

By Brett Foote | 2026-05-12 12:50:07


VIEW MORE
story-6
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!

Slideshow: Everything You Need to Know about the 2027 Super Duty Carhartt Package!

By Michael S. Palmer | 2026-05-07 17:51:06


VIEW MORE
story-7
10 Most Surprising 2026 Ford Truck Features!

Slideshow: 10 most surprising Ford truck options/features in 2026.

By Joe Kucinski | 2026-05-05 11:17:22


VIEW MORE
story-8
Top 10 Ford Trucks Coming to Mecum Indy 2026

Slideshow: Here are the top 10 Fords coming to Mecum Indy 2026.

By Brett Foote | 2026-05-04 13:49:49


VIEW MORE
story-9
5 Best / 5 Worst Ford Truck Wheels of All Time

Slideshow: The 5 best and 5 worst Ford truck wheels of all time

By Joe Kucinski | 2026-04-29 16:49:01


VIEW MORE