I have noticed a lot of HP claims are made at 5000 feet of elevation - Ford Powerstroke Diesel Forum
6.0L Performance Parts Discussion What has or has not worked for you?

User Tag List

LinkBack Thread Tools Display Modes
post #1 of 3 Old 01-19-2009, 12:46 PM Thread Starter
Compression Ignition Addict
14mins's Avatar
Join Date: Dec 2008
Location: aledo
Posts: 255
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
I have noticed a lot of HP claims are made at 5000 feet of elevation

I was thumbing thru a few diesel mags and a lot of the claims made by programmers are made at high elevations. Some are over 5000 feet. I was told that the best HP is always made at or close to sea level, in fact a lot of dyno will self correct to sea level. What is the deal with these claims? Do turbo;s make more power at higher elevations or is it just the companies that are making these products located in higher elevations?

A few years back my partner and i did extensive dyno testing for the owner of MBRP when he was working on building his line of ATV exhaust. We were dynoing at 800 feet elevation. The owner of MBRP made me some one of a kind atv stuff, it was a shame i did not have a diesel truck at the time.

2005 YELLOW f250, REMOVED PROGRAMMER, yellow guage cluster background, JL 5 channel amp, Infinity speakers, JL sub in custom box, aftermarket seat heaters, cab lights, 3 inch Lift. idle mod, 35 inch tires. 1979 YELLOW Corvette, 2005 YELLOW Dodge SRT 4 TURBO Neon, 2005 YELLOW Monte Carlo SS and a 1987 Buick Grand National for when the NEED FOR SPEED hits. I have dreams of painting this car YELLOW!!!!!!!!!!!!!!!!!!!!!!
14mins is offline  
Sponsored Links
post #2 of 3 Old 01-19-2009, 10:35 PM
Premium Member
AFBLUE's Avatar
Join Date: Nov 2007
Location: Buffalo, NY
Posts: 1,824
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
I think its becuase Turbo engines loose less performance with altitude. Yes an engine will make the most amount of Hp at sea level. But if its a parts comparison they can say, oh look we added 120hp, when becuase of the altitude the hp was down 10% to start, which at sea level would only add 108hp.

06 CCSB Lariat 102K
Factory 20s w/ Nitto Trail Grappler 35X12.5X20
Vegistroke 75,000 miles
2.5" Readylift Level
ARP Head Studs
EGR delete
Swamps 58V FICM
Isspro Gauges, EGT, Boost, Trans.
20ft of 4" straight pipe!!
SCT X3 BAMF Innovative Xtreme Race

AFBLUE is offline  
post #3 of 3 Old 01-19-2009, 10:46 PM
lost in space
wingnut's Avatar
Join Date: May 2007
Location: wa state
Posts: 1,366
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 4
Thanked 1 Time in 1 Post
Feedback Score: 0 reviews
the only way a turbo will make more at altitude vs. a gasser is if you can turn the boost up as you go up.

in other words, the losses will be the same percentage-wise turbo to non-turbo as altitude increases with a non-adjustable turbo setup.

id say its just because of where their shop is...

past trucks...
72 F350 2wd 390/auto
85 C10 4x4 (first & last chevy)
86 F150 2wd 300/4 spd
75 F100 4x4 460/auto & 38" Hawgs
77 F250 highboy 4x4 400/4 speed
76 F350 4x4 390/4 speed 6" lift 38" Hawgs
89 Eddie Bauer Bronco
79 Bronco 460/auto 35" Swampers
93 Lightning with KB 2.2
01 supercrew 2wd 5.4 liter
01 F250 Platinum 7.3 diesel 6" icon 35" procomps
...and currently a 75 F100, waiting for a 6.0 heart
wingnut is offline  
Sponsored Links

Quick Reply

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:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


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