RV.Net Open Roads Forum: Towing: Timbrem or Sumos on F150

RV Blog

  |  

RV Sales

  |  

Campgrounds

  |  

RV Parks

  |  

RV Club

  |  

RV Buyers Guide

  |  

Roadside Assistance

  |  

Extended Service Plan

  |  

RV Travel Assistance

  |  

RV Credit Card

  |  

RV Loans

Open Roads Forum Already a member? Login here.   If not, Register Today!  |  Help

Newest  |  Active  |  Popular  |  RVing FAQ Forum Rules  |  Forum Posting Help and Support  |  Contact  

Search:   Advanced Search

Search only in Towing

Open Roads Forum  >  Towing

 > Timbrem or Sumos on F150

Reply to Topic  |  Subscribe  |  Print Topic  |  Post New Topic  | 
Page of 2  
Prev
Sponsored By:
Super_Dave

Harrisville, UT

Senior Member

Joined: 01/19/2007

View Profile


Offline
Posted: 08/18/21 11:48am Link  |  Quote  |  Print  |  Notify Moderator

valhalla360 wrote:

Super_Dave wrote:

IMO, leaving the gap creates the SLAM effect. When I used something similar with my cabover camper, I had the block just barely engaged with the spring.


When fully loaded, the gap goes away before you hit the road, so it's already carrying some weight and generally not slamming with either option.

When running empty, they engage only when you hit a bump (ie: the gap is used up):
- Timbrens apply full resistance as soon as they touch. X lbs/inch of compression.
- Sumo gradually increases resistance after they touch Y lbs/inch/inch

So all else being equal, the sumo will apply far less for the first inch of compression but will quickly ramp up as compression increases creating a smoother feel as they engage.

If you take away the gap with Timbrens while running empty, it will give a rough (but not slamming) ride as the resistance is enough in that they lift the empty bed rather than compress the springs & timbrens.

Airbags get around this by adjusting the pressure to the load but they are more complex and prone to failure.

Yes, no gap when loaded should be the idea, not running empty.


Truck: 2006 Dodge 3500 Dually
Rig: 2018 Big Country 3155 RLK
Boat: 21' North River Seahawk


mooky stinks

Cicero,NY

Senior Member

Joined: 07/26/2008

View Profile



Good Sam RV Club Member

Offline
Posted: 08/18/21 11:50am Link  |  Quote  |  Print  |  Notify Moderator

I have the black Sumos on my F150 with a 1” gap. It rides like stock when unloaded and drops 2” when towing the 5th wheel. Would definitely buy again.


2020 F150 XL Screw 4x4 6.5”box
3.5 ecoboost Max tow HDPP
7850 GVW. 4800 RAWR
2565 payload

2020 Cougar 29RKS 5th wheel

bikendan

Camano Island, Wash.

Senior Member

Joined: 11/21/2005

View Profile



Good Sam RV Club Member

Offline
Posted: 08/18/21 12:02pm Link  |  Quote  |  Print  |  Notify Moderator

speediq99 wrote:

Hi Dan, did you go with the blues (1000lbs) or black Sumos (1500)?

We are towing 7500 lbs. It sounds like the blues are softer and may be easier over bumps.

BTW, the gap doesn't create the slam effect when towing as the rubber is in full contact and compress. I think it is the hardness of the rubber in the Timbren that causes the jarring effect.

MC


I went with the blue ones since I have plenty of payload capacity but wanted to help with the small amount of rear sag.


Dan- Firefighter, Retired">, Shawn- Musician/Entrepreneur">, Zoe- Faithful Golden Retriever(RIP">), 2014 Ford F150 3.5 EcoboostMax Tow pkg, 2016 PrimeTime TracerAIR 255 w/4pt Equalizer and 5 Mtn. bikes and 2 Road bikes

Reply to Topic  |  Subscribe  |  Print Topic  |  Post New Topic  | 
Page of 2  
Prev

Open Roads Forum  >  Towing

 > Timbrem or Sumos on F150
Search:   Advanced Search

Search only in Towing


New posts No new posts
Closed, new posts Closed, no new posts
Moved, new posts Moved, no new posts

Adjust text size:




© 2021 CWI, Inc. © 2021 Good Sam Enterprises, LLC. All Rights Reserved.