Calguns.net  

Home My iTrader Join the NRA Donate to CGSSA Sponsors CGN Google Search
CA Semiauto Ban(AW)ID Flowchart CA Handgun Ban ID Flowchart CA Shotgun Ban ID Flowchart
Go Back   Calguns.net > OUTDOORS, HUNTING AND SURVIVAL > Camping, Hiking and Outdoor Activities
Register FAQ Members List Calendar Mark Forums Read

Camping, Hiking and Outdoor Activities Camping, hiking, and other outdoor activities within.

Reply
 
Thread Tools Display Modes
  #1  
Old 06-20-2018, 9:18 AM
BigFatGuy's Avatar
BigFatGuy BigFatGuy is offline
Veteran Member
 
Join Date: Oct 2010
Location: Compton, CA
Posts: 2,627
iTrader: 5 / 100%
Default Sumo "springs" in a Class B Sprinter van?

My RV is a class b in a Sprinter van. the back end of the vehicle is very prone to an oscillating sway if I, for instance, hit a moderate size speed bump at anything other than 90 degrees... or if I nick the non-ramp edge of a driveway while turning onto the street. The entire rear of the vehicle swings side-to-side for several seconds.

This doesn't really hurt handling, I can drive straight while it's swaying, but it feels damned scary, and messes up the beer bottles in my fridge.

I figure it's a symptom of the vehicle being under-loaded. When returning from my hunting trip, with the rear of the van holding about 500 lbs of meat, coolers, and ice, the RV drove like a dream. It was immune to speed bumps, the suspension felt a lot less stiff, and the RV slowly "porpoised" after hitting a bump in the road in a very comfortable and non-beer-bottle-jarring way. I've noticed similar improvements when putting some serious weight in the back of my Bronco.

I was thinking about trying Sumo Springs (basically stiff closed-cell-foam "springs"), as I can add them to all 4 corners for less than $500, and they use stock mounting locations for rubber bump-stops.

I'm thinking, though, if the issue is that the RV is over-sprung and under-loaded, will adding "helper" springs really make the issue better? or will it make the issue worse?

Anyone have any experience?
Reply With Quote
  #2  
Old 06-21-2018, 6:37 AM
luckylogger6 luckylogger6 is offline
Member
 
Join Date: Dec 2007
Location: Northern CA
Posts: 368
iTrader: 1 / 100%
Default

sumo springs seem to just be an alternative to the more common air bag helpers. I think you problem is in the shocks. their job is to dampen the "bounce" of the suspension. look into RV specific shocks. Koni, Bilstine and others make specialized RV shocks to handle just what I think your describing.
Reply With Quote
  #3  
Old 06-21-2018, 8:32 AM
BigFatGuy's Avatar
BigFatGuy BigFatGuy is offline
Veteran Member
 
Join Date: Oct 2010
Location: Compton, CA
Posts: 2,627
iTrader: 5 / 100%
Default

Quote:
Originally Posted by luckylogger6 View Post
sumo springs seem to just be an alternative to the more common air bag helpers. I think you problem is in the shocks. their job is to dampen the "bounce" of the suspension. look into RV specific shocks. Koni, Bilstine and others make specialized RV shocks to handle just what I think your describing.
I figure that to be the case... but a new set of shocks is a lot more expensive than some rubber inserts for the suspension. :-)
Reply With Quote
  #4  
Old 06-21-2018, 2:41 PM
gorn5150's Avatar
gorn5150 gorn5150 is offline
Senior Member
 
Join Date: Aug 2007
Posts: 1,217
iTrader: 0 / 0%
Default

I have a sprinter with a class C setup. I've never experienced the sway so it could be the lack of load weight you are talking about. I've had air bags on a couple of class A motorhomes and they made a huge difference in handling and sway.
Reply With Quote
  #5  
Old 06-21-2018, 4:09 PM
sonofeugene's Avatar
sonofeugene sonofeugene is offline
Senior Member
 
Join Date: Oct 2013
Posts: 1,878
iTrader: 0 / 0%
Default

Springs support the load and shocks control the bounce and movement of the suspension.

If the springs are sufficiently stiff to support the loads you carry, then the problem is shocks, not springs. You might also look into some rear anti sway bars.
__________________
Let us not pray to be sheltered from dangers but to be fearless when facing them. - Rabindranath Tagore

A mind all logic is like a knife all blade. It makes the hand bleed that uses it. - Rabindranath Tagore
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

Forum Jump



All times are GMT -8. The time now is 9:10 PM.




Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Proudly hosted by GeoVario the Premier 2A host.
Calguns.net, the 'Calguns' name and all associated variants and logos are ® Trademark and © Copyright 2002-2018, Calguns.net an Incorporated Company All Rights Reserved.
Calguns.net and The Calguns Foundation have no affiliation and are in no way related to each other.
All opinions, statements and remarks made by Calguns.net on this web site and elsewhere are solely attributable to Calguns.net.