Journey with Confidence RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Take a Speed Test Free 7 Day Trial ×
 


Reply
 
Thread Tools Display Modes
 
Old 09-24-2015, 05:42 AM   #1
Member
 
rebar's Avatar
 
Join Date: Mar 2013
Location: Iowa
Posts: 56
Front leaf spring arch, and resulting travel or lift?

I'm considering aftermarket progressive leaf springs for my 88 F350 D60 front axle, but I haven't removed the existing 2wd front suspension to make room to measure how much arch I want.

Can anyone comment on how much arch their front springs were, and how much travel or lift they ended up with?

I want to keep the van as low as possible on 33" tires as its main duty is interstate towing. So without knowing the arch, I was going to order 1"- 2" 2200 lb capacity F350 springs and hope its low enough or modify the frame hangers higher if its to low.

Thanks!
__________________

__________________
1995 E350 cummins 6bt/nv4500, 24' surv toyhauler, DRZ400s
rebar is offline   Reply With Quote
Old 09-24-2015, 07:44 AM   #2
Senior Member
 
Tapatio's Avatar
 
Join Date: Nov 2010
Location: California
Posts: 1,002
Garage
Re: Front leaf spring arch, and resulting travel or lift?

The SMB leaf over axle setup is almost completely flat. I haven't removed them to see if there is any arch.
__________________

__________________
2006 E350 6.0PSD 5R110, SMB 4X4, RB-50, ARB lockers front/rear, Aluminess galore, AMP steps.
Callsign KK6GIY
Tapatio is offline   Reply With Quote
Old 09-24-2015, 07:58 AM   #3
Member
 
rebar's Avatar
 
Join Date: Mar 2013
Location: Iowa
Posts: 56
Re: Front leaf spring arch, and resulting travel or lift?

Quote:
Originally Posted by Tapatio
The SMB leaf over axle setup is almost completely flat. I haven't removed them to see if there is any arch.
Thanks Tapatio.
Id like my leafs to end up flat like yours. I imagine yours looks like this..

http://octopup.org/sportsmobile/4x4
__________________
1995 E350 cummins 6bt/nv4500, 24' surv toyhauler, DRZ400s
rebar is offline   Reply With Quote
Old 09-24-2015, 08:19 AM   #4
Senior Member
 
Tapatio's Avatar
 
Join Date: Nov 2010
Location: California
Posts: 1,002
Garage
Re: Front leaf spring arch, and resulting travel or lift?

Advertised wheel travel is 22" with the sway bar disconnected.

http://www.sportsmobile.com/sportsmobile-4x4/
__________________
2006 E350 6.0PSD 5R110, SMB 4X4, RB-50, ARB lockers front/rear, Aluminess galore, AMP steps.
Callsign KK6GIY
Tapatio is offline   Reply With Quote
Old 09-24-2015, 09:37 PM   #5
Senior Member
 
UJOINT's Avatar
 
Join Date: Feb 2009
Location: AVL NC
Posts: 1,001
Re: Front leaf spring arch, and resulting travel or lift?

Would love to know how they measure to get 22" of travel from a leaf spring.
__________________
Chris Steuber
02 E350 7.3 (V4)
17 Focus RS, 90 SHO, 49 CJ2A, 89 LSC, 20 T250 AWD
ujointoffroad.com
UJOINT is offline   Reply With Quote
Old 09-24-2015, 11:50 PM   #6
Senior Member
 
Join Date: Feb 2014
Location: Santa Maria, CA
Posts: 561
Re: Front leaf spring arch, and resulting travel or lift?

Combined articulated wheel travel? In that case, my crawler would have nearly 60" of travel (which really has more like 18" of vertical travel.)

You can't simply go by free arch to determine ride height and/or travel. As an example, a spring with little arch and a high spring rate can have exactly the same ride height as a spring with a lot of free arch and a low spring rate... however, they will perform DRASTICALLY different. If I were in your shoes and insisted on making one-off hangers (is that what you're doing) I'd first have the van weighed, get some rough dimensions of where your hangers will be (even cardboard mockup brackets taped to the frame could get you semi-close), determine your desired ride height/loaded arch (and intended use) and start calling spring manufacturers.

Commercially available "kits" might start looking like a better value after that... Maybe buying production springs from U-joint (or other?) and making your brackets fit the springs would be a good option (or is that what you meant in the first place?)
TheLetterJ is offline   Reply With Quote
Old 09-25-2015, 06:37 AM   #7
Member
 
rebar's Avatar
 
Join Date: Mar 2013
Location: Iowa
Posts: 56
Re: Front leaf spring arch, and resulting travel or lift?

Quote:
Originally Posted by TheLetterJ
Commercially available "kits" might start looking like a better value after that... Maybe buying production springs from U-joint (or other?) and making your brackets fit the springs would be a good option (or is that what you meant in the first place?)
Thanks. I'm going to ask Chris. Even though his hangers wont work, Im sure his springs would.
__________________
1995 E350 cummins 6bt/nv4500, 24' surv toyhauler, DRZ400s
rebar is offline   Reply With Quote
Old 09-25-2015, 07:50 AM   #8
Senior Member
 
UJOINT's Avatar
 
Join Date: Feb 2009
Location: AVL NC
Posts: 1,001
Re: Front leaf spring arch, and resulting travel or lift?

My springs and hangers are made to work together. Length, center pin location, lift height, etc.

So yes, my kit would make the conversion MUCH simpler but you already know that
__________________
Chris Steuber
02 E350 7.3 (V4)
17 Focus RS, 90 SHO, 49 CJ2A, 89 LSC, 20 T250 AWD
ujointoffroad.com
UJOINT is offline   Reply With Quote
Old 09-25-2015, 04:43 PM   #9
Senior Member
 
Join Date: Jul 2008
Posts: 496
Re: Front leaf spring arch, and resulting travel or lift?

Quote:
Originally Posted by UJOINT
Would love to know how they measure to get 22" of travel from a leaf spring.
22 inches my *ss. No way.
j.whitbread is offline   Reply With Quote
Old 09-25-2015, 04:51 PM   #10
Senior Member
 
BajaSportsmobile's Avatar
 
Join Date: Sep 2011
Location: Rancho Nuevo (Cabo/Todos Santos) B.C.S. and San Diego, CA
Posts: 1,952
Re: Front leaf spring arch, and resulting travel or lift?

Quote:
Originally Posted by UJOINT
Would love to know how they measure to get 22" of travel from a leaf spring.
Add up all four corners?
__________________

__________________
Four time Baja 1000 winner, four time Baja 500 winner. Solo'ed the Baja 1000 to LaPaz/Cabo twice.
4-Wheeling since 1972, Desert Racing since 1989.

AgileOffRoad.com
BajaSportsmobile is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not 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 Off
Pingbacks are Off
Refbacks are Off

» Sportsmobile Registry

ClifFord

EliMakes

MoMo

skyrat
Add your Sportsmobile
Powered by vBadvanced CMPS v3.2.3
Disclaimer:

This website is not affiliated with or endorsed by Sportsmobile SIP or any of its affiliates. This is an independent, unofficial site.


All times are GMT -6. The time now is 02:56 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2022, vBulletin Solutions, Inc.
×