Load bearing dyno numbers vs. inertia drum dyno numbers - Ford Powerstroke Diesel Forum

6.4L Performance Parts Discussion What has or has not worked for you?

Reply
 
LinkBack Thread Tools Display Modes
post #1 of 12 Old 08-12-2009, 06:40 PM Thread Starter
Compression Ignition Addict
 
AED F250's Avatar
 
Join Date: Jun 2009
Location: Sacramento
Posts: 474
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Load bearing dyno numbers vs. inertia drum dyno numbers

I was just wondering if anyone could tell me how much difference there is in power from load bearing dyno numbers vs. inertia drum dyno numbers. One would think that the load bearing dyno would help the truck build up boost for the pull, which will equal more power. I was just wondering if this is the case??????

2008 FX4

Fabtech 8 w/37's

Intake, delete pipe/exhaust, Spartan/KEM tuning

567 RWHP/1128 RWTQ

13.3 @ 103.9 MPH
AED F250 is offline  
post #2 of 12 Old 08-12-2009, 07:27 PM
Compression Ignition Addict
 
F250stroker08's Avatar
 
Join Date: Apr 2008
Location: Pennsylvania
Posts: 175
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Send a message via AIM to F250stroker08
idk but when i was out at Sheid Diesel Extravaganza they had both and it seemed like there were more trucks making bigger power on dunbars drum dyno than on scheids load bearing dyno

2008 Ford F-250 6.4l Lariat Crew Cab
35x12.50r18 Trail Grapplers on KMC Rockstar's
F250stroker08 is offline  
post #3 of 12 Old 08-12-2009, 07:37 PM
FJuanfiddy mod


 
Dave's Avatar
 
Join Date: Nov 2006
Location: Trempealeau, WI
Posts: 31,826
Thanks: 132
Thanked 186 Times in 166 Posts
Mentioned: 0 Post(s)
Quoted: 7 Post(s)
Feedback Score: 0 reviews
Send a message via Yahoo to Dave
Load dynos generally show higher power readings when operated properly.

The reason Dunbars Dyno was showing better results than Scheids is Dunbar knows what he's doing when running it.

Email: Dave@powerstroke.org
2011 F150 Ecoboost Crew cab lariat. Custom tunes from KEM and 5Star, and Unleashed
2012 F150 Crew Cab Ecoboost stock for now-Totaled March 12 2015
2006 F250 ECSB Lariat 4x4

Leveling kit, 315/70/17 Kelly TSRs on Method race wheels
ARP studs and OEM gaskets done by Renegade Diesel
ECM and Atlas 40 FICM tuned by Bill at PHP SCT tunes by Truck Source Diesel. Gearhead, Innovative, Wildman and Tyrant diesel
Flowmaster/MBRP Hybrid Exhaust
Edge Insight CTS
Coolant filter
Bulletproof diesel FICM EGR Delete, Oil Cooler and Water Pump, and Light bar.
Dually LED lights from Stealth Automotive/Xpedition Outfitters
No Limit Fab 6.0 Cold Air Intake
http://www.bulletproofdiesel.com/default.asp
http://nolimitfabrication.com/
Dave is offline  
post #4 of 12 Old 08-13-2009, 04:09 AM
Compression Ignition Addict
 
Join Date: Jul 2008
Location: Houston, TX
Posts: 1,211
Thanks: 0
Thanked 1 Time in 1 Post
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
You can make a dyno read whatever you like. So "knows what he's doing" isn't necessarily what it sounds like. "Knows how to fudge numbers" might be a better choice of words....
po-po 5.0 is offline  
post #5 of 12 Old 08-13-2009, 06:18 AM Thread Starter
Compression Ignition Addict
 
AED F250's Avatar
 
Join Date: Jun 2009
Location: Sacramento
Posts: 474
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
I own an inertia drum dyno that I use for tuning cars here are my shop. I know its not the ideal setup for tuning anything with a large, slow spooling turbo. With these trucks where the entire pull only takes 3 seconds there really isn't enough time to reach full boost. I have been seeing 35ish psi at the end of the pull.

So basically what I'm asking is are the load bearing dynos producing more power due to loading down the truck to make more boost?? Not is the guy operating the dyno fudging numbers.

2008 FX4

Fabtech 8 w/37's

Intake, delete pipe/exhaust, Spartan/KEM tuning

567 RWHP/1128 RWTQ

13.3 @ 103.9 MPH
AED F250 is offline  
post #6 of 12 Old 08-13-2009, 06:20 AM
FJuanfiddy mod


 
Dave's Avatar
 
Join Date: Nov 2006
Location: Trempealeau, WI
Posts: 31,826
Thanks: 132
Thanked 186 Times in 166 Posts
Mentioned: 0 Post(s)
Quoted: 7 Post(s)
Feedback Score: 0 reviews
Send a message via Yahoo to Dave
Quote:
Originally Posted by AED F250 View Post
I own an inertia drum dyno that I use for tuning cars here are my shop. I know its not the ideal setup for tuning anything with a large, slow spooling turbo. With these trucks where the entire pull only takes 3 seconds there really isn't enough time to reach full boost. I have been seeing 35ish psi at the end of the pull.

So basically what I'm asking is are the load bearing dynos producing more power due to loading down the truck to make more boost?? Not is the guy operating the dyno fudging numbers.
The answer is yes. However you can simulate that a little by riding the brake on the truck a little in the beginning of the run

Email: Dave@powerstroke.org
2011 F150 Ecoboost Crew cab lariat. Custom tunes from KEM and 5Star, and Unleashed
2012 F150 Crew Cab Ecoboost stock for now-Totaled March 12 2015
2006 F250 ECSB Lariat 4x4

Leveling kit, 315/70/17 Kelly TSRs on Method race wheels
ARP studs and OEM gaskets done by Renegade Diesel
ECM and Atlas 40 FICM tuned by Bill at PHP SCT tunes by Truck Source Diesel. Gearhead, Innovative, Wildman and Tyrant diesel
Flowmaster/MBRP Hybrid Exhaust
Edge Insight CTS
Coolant filter
Bulletproof diesel FICM EGR Delete, Oil Cooler and Water Pump, and Light bar.
Dually LED lights from Stealth Automotive/Xpedition Outfitters
No Limit Fab 6.0 Cold Air Intake
http://www.bulletproofdiesel.com/default.asp
http://nolimitfabrication.com/
Dave is offline  
post #7 of 12 Old 08-13-2009, 06:29 AM Thread Starter
Compression Ignition Addict
 
AED F250's Avatar
 
Join Date: Jun 2009
Location: Sacramento
Posts: 474
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Quote:
Originally Posted by Dave View Post
The answer is yes. However you can simulate that a little by riding the brake on the truck a little in the beginning of the run
Yeah I have tried that a couple of times, but I believe that when you touch the brake it unlocks the converter which makes the numbers lower and not accurate. I could be wrong.

2008 FX4

Fabtech 8 w/37's

Intake, delete pipe/exhaust, Spartan/KEM tuning

567 RWHP/1128 RWTQ

13.3 @ 103.9 MPH
AED F250 is offline  
post #8 of 12 Old 08-13-2009, 06:31 AM
FJuanfiddy mod


 
Dave's Avatar
 
Join Date: Nov 2006
Location: Trempealeau, WI
Posts: 31,826
Thanks: 132
Thanked 186 Times in 166 Posts
Mentioned: 0 Post(s)
Quoted: 7 Post(s)
Feedback Score: 0 reviews
Send a message via Yahoo to Dave
Quote:
Originally Posted by AED F250 View Post
Yeah I have tried that a couple of times, but I believe that when you touch the brake it unlocks the converter which makes the numbers lower and not accurate. I could be wrong.
Thats why you only do it initially. You dont ride the brake the entire time. Just long enough to get it to start to spool

Email: Dave@powerstroke.org
2011 F150 Ecoboost Crew cab lariat. Custom tunes from KEM and 5Star, and Unleashed
2012 F150 Crew Cab Ecoboost stock for now-Totaled March 12 2015
2006 F250 ECSB Lariat 4x4

Leveling kit, 315/70/17 Kelly TSRs on Method race wheels
ARP studs and OEM gaskets done by Renegade Diesel
ECM and Atlas 40 FICM tuned by Bill at PHP SCT tunes by Truck Source Diesel. Gearhead, Innovative, Wildman and Tyrant diesel
Flowmaster/MBRP Hybrid Exhaust
Edge Insight CTS
Coolant filter
Bulletproof diesel FICM EGR Delete, Oil Cooler and Water Pump, and Light bar.
Dually LED lights from Stealth Automotive/Xpedition Outfitters
No Limit Fab 6.0 Cold Air Intake
http://www.bulletproofdiesel.com/default.asp
http://nolimitfabrication.com/
Dave is offline  
post #9 of 12 Old 08-13-2009, 06:52 AM Thread Starter
Compression Ignition Addict
 
AED F250's Avatar
 
Join Date: Jun 2009
Location: Sacramento
Posts: 474
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
I'll give that a shot next time I strap the truck on the roller. Thanks.

2008 FX4

Fabtech 8 w/37's

Intake, delete pipe/exhaust, Spartan/KEM tuning

567 RWHP/1128 RWTQ

13.3 @ 103.9 MPH
AED F250 is offline  
post #10 of 12 Old 08-13-2009, 06:57 AM
Compression Ignition Addict


 
08stroker250's Avatar
 
Join Date: Dec 2008
Location: Georgia
Posts: 8,819
Thanks: 5
Thanked 16 Times in 15 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Quote:
Originally Posted by po-po 5.0 View Post
You can make a dyno read whatever you like. So "knows what he's doing" isn't necessarily what it sounds like. "Knows how to fudge numbers" might be a better choice of words....
Dunbar uses a 1.02 correction factor, which on my dyno run was a 10.01 difference in uncorrected. He showed me the computer and pulled up my results. My 1.02 correction factor numbers were 560/1110 and my uncorrected number was 549.98/109X. Then he showed me standard correction, which is what a lot of dyno operators use. That was 571/1133. I guess it just depends on the operator and what correction factor they use and what load they use....

Jeff Dodd
spartan_jeff12@yahoo.com

2012 Ford F-250 Lariat CC/SB

Mods - Spartan tuned via laptop, 4" AFE stainless exhaust system, 2.5" PMF BMC leveling spacers, 3" PMF lift blocks, Fox Racing 2.0 shocks, Recon smoked mirror & cab lights
08stroker250 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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On

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