How does height affect MPGs? - PowerStrokeNation : Ford Powerstroke Diesel Forum
 
LinkBack Thread Tools Display Modes
post #1 of 7 (permalink) Old 01-17-2015, 05:49 AM Thread Starter
PSN Local
 
Jestes's Avatar
 
Join Date: Jun 2014
Location: missouri
Posts: 340
Question How does height affect MPGs?

I know that going taller and higher obviously equals lower MPGs. My truck came with what one may call a leveling kit.. Maybe 1.5" blocks between the axles and leafes. If I were to drop it by that much to stock height would I see much better than 18-19 hwy MPGs? What if I went even lower.. How do you go lower without affecting payload and towing capabilities?

"They make the dollar, I make the dime. That's why I poop on company time"
L99 F-250 superduty SC LB 4x4
7.3l powerstroke diesel
Swamp's 175/146 singles
Zf-6 speed gear grinder
Cooper ATP all terrains

1995 Jeep grand Cherokee swapped 5 spd
1984 Yamaha 225dx three wheeler
1983 Yamaha xt200
1979 Kawasaki KZ-650
Jestes is offline  
Sponsored Links
Advertisement
 
post #2 of 7 (permalink) Old 01-18-2015, 02:16 PM
PSN Local
 
SD26's Avatar
 
Join Date: Jul 2008
Posts: 205
Re: How does height affect MPGs?

I had a Ford bus for years. I used it to pull an enclosed trailer for years, and I had regular trips to the same locations. I put on larger tires to lower the overall gear ratio, which additionally raised the overall height (in addition to making the tires heavier). I did loose MPG even though at the same speed my RPM's were lower.

Dave Whittmer can probably answer more questions about dropping while not affecting payload, or at least reducing that affect. Might want to search some of his posts here.

Dave
2005 E350 6.0PSD
2003 Excursion Limited 4WD 7.3PSD - Sold
1996 E350SD dually 7.3PSD - Gone!

2002 VW Jetta TDI - stock
2007 Escape Hybrid
1999 Kaw KLR650 - 17/42 gearing
SD26 is offline  
post #3 of 7 (permalink) Old 01-27-2015, 04:45 PM
MPG Moderator
 
Dave Whitmer's Avatar
 
Join Date: Jul 2007
Posts: 1,076
Re: How does height affect MPGs?

Dropping my truck 4" in the front and 6" in the rear gained me 1.5 MPG with no other mods. Riding lower it corners a lot better but is still a pickup truck - not a Corvette.

Air bags in the rear.recover your load-carrying capabilities.

Lowering the truck caused no alignment issues.

I don't think a 4x4 can be "slammed" (to use sport truck parlance). My truck is a 4x2.

2000 F-350 SC 4x2 6 speed
3.08 gears Gear Vendor Overdrive
Slammed 4"
Rugged Air Dam
315,000 miles
Dave Whitmer is offline  
 
post #4 of 7 (permalink) Old 01-29-2015, 06:52 PM Thread Starter
PSN Local
 
Jestes's Avatar
 
Join Date: Jun 2014
Location: missouri
Posts: 340
Re: How does height affect MPGs?

Quote:
Originally Posted by Dave Whitmer View Post
Dropping my truck 4" in the front and 6" in the rear gained me 1.5 MPG with no other mods. Riding lower it corners a lot better but is still a pickup truck - not a Corvette.

Air bags in the rear.recover your load-carrying capabilities.

Lowering the truck caused no alignment issues.

I don't think a 4x4 can be "slammed" (to use sport truck parlance). My truck is a 4x2.
Yes just at glance lowering in the front is definitely going to be difficult. I don't think it could drop any more than an inch before stuff starts colliding. With a 1.5 mpg increase on a 4x2 dropping 4 inches I don't think my 4x4 would gain much from a drop to be worth doing. But air bags for the rear do interest me.. Does it help with ride quality loaded or not? I've got an air compressor in my truck that can do 100psi (not sure of the rate) what would a setup like that run with my own (easily upgradeable) compressor?

"They make the dollar, I make the dime. That's why I poop on company time"
L99 F-250 superduty SC LB 4x4
7.3l powerstroke diesel
Swamp's 175/146 singles
Zf-6 speed gear grinder
Cooper ATP all terrains

1995 Jeep grand Cherokee swapped 5 spd
1984 Yamaha 225dx three wheeler
1983 Yamaha xt200
1979 Kawasaki KZ-650
Jestes is offline  
post #5 of 7 (permalink) Old 01-30-2015, 12:18 AM
"Slap hands slap hands"
 
FlossyB's Avatar
 
Join Date: Sep 2013
Location: Las Vegas
Posts: 1,488
Re: How does height affect MPGs?

I have Firestone ride rite air bags in the rear of my EX love them makes a big difference in leveling while towing my boat with 7 ppl in the truck and overall ride quality. Couldn't be happier.

JB
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
FlossyB is offline  
post #6 of 7 (permalink) Old 01-30-2015, 02:32 AM Thread Starter
PSN Local
 
Jestes's Avatar
 
Join Date: Jun 2014
Location: missouri
Posts: 340
Re: How does height affect MPGs?

Quote:
Originally Posted by FlossyB View Post
I have Firestone ride rite air bags in the rear of my EX love them makes a big difference in leveling while towing my boat with 7 ppl in the truck and overall ride quality. Couldn't be happier.
7 people? Sounds like a party. I'm def looking into this considering I have the air supply figured out already

"They make the dollar, I make the dime. That's why I poop on company time"
L99 F-250 superduty SC LB 4x4
7.3l powerstroke diesel
Swamp's 175/146 singles
Zf-6 speed gear grinder
Cooper ATP all terrains

1995 Jeep grand Cherokee swapped 5 spd
1984 Yamaha 225dx three wheeler
1983 Yamaha xt200
1979 Kawasaki KZ-650
Jestes is offline  
post #7 of 7 (permalink) Old 01-30-2015, 12:45 PM
"Slap hands slap hands"
 
FlossyB's Avatar
 
Join Date: Sep 2013
Location: Las Vegas
Posts: 1,488
Re: How does height affect MPGs?

Quote:
Originally Posted by Jestes View Post
7 people? Sounds like a party. I'm def looking into this considering I have the air supply figured out already
Check on eBay that where I got mine for a reasonable price and shipped fast. Yep 7 sometimes 8 that why I went with the excursion for the lake and towing the boat and not a pick up. And it's a hell of a party

JB
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
FlossyB is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the PowerStrokeNation : 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










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