Go Back   Thor Forums > Thor Brands and Products > Thor Motor Coach | Class A, Class B+ & Class C Motorhomes
Click Here to Login
Reply
 
Thread Tools Display Modes
 
Old 10-31-2016, 07:50 PM   #1
Senior Member
 
Brand: Thor Motor Coach
Model: Hurricane 27K
State: California
Posts: 488
THOR #2544
Air Bag Upgrade

Does anyone know if it is possible to upgrade an F53 chassis with leaf springs to Airbags and what the cost might be?
Thank you and God Bless!
__________________

__________________
This post is opinion based on experience.
2015 Hurricane 27K
2013 Sea Ray 220SD
brucev is offline   Reply With Quote
Old 11-01-2016, 02:56 AM   #2
Senior Member
 
Hudsoner's Avatar
 
Brand: Thor Motor Coach
Model: Hurricane 29D
State: Florida
Posts: 248
THOR #5756
One can come close to it with a Klederman suspension system

https://kelderman.com/news/does-your...er-ride-rough/
__________________

__________________
Hudsoner is offline   Reply With Quote
Old 11-01-2016, 09:35 AM   #3
Senior Member
 
dstankov's Avatar
 
Brand: Entegra
Model: Entegra Accolade 37TS
State: Virginia
Posts: 3,363
THOR #1469
Firestone make the Ride Rite Air Helpers for the F53. They say they are not compatible with Thor. You would need to look at the body mounts on your coach and make sure they are not in the location where the air helpers would need to be installed. The kit runs about 325.00 per axle. I had them on my prior class c and they worked very well.
__________________
Dave
US Army (Ret)
Chester, VA
2020 Entegra Accolade 37TS
FMCA - F432054
dstankov is offline   Reply With Quote
Old 11-01-2016, 01:35 PM   #4
Senior Member
 
Hudsoner's Avatar
 
Brand: Thor Motor Coach
Model: Hurricane 29D
State: Florida
Posts: 248
THOR #5756
The Firestone airbags, or any airbags are like helper springs, and the Sumo Maxime springs (I have them installed) are similar in their action. They do nothing (or hardly anything) to soften the ride, because they are in addition to the original springs.
There are pretty detailed discussions about air bags as helper springs over on iRV2, and some engineering people explain why air bags can't improve the ride by any measurable margin.

If one would want to get any benefit from those airbags in relation to a softer ride, one would have to change the original leaf springs for softer ones (Kelderman is doing this), and I am looking into this to do this in combination with my Sumo springs.

I found that all Ford F series springs would fit the F53 chassis, and that the spring ratings step down by 600 lb each. That means, the springs of the F450 carry 600 lb less than the springs of the F550/F53, and the ones of the F350 carry 1200 lb less, etc.

In my case, I probably would need to install the F450 springs to get a softer ride and have the Sumo springs handle part of the job.

Another way to soften the ride is to find out he exact weight of the rig at the front axle, and subtract that weight from the load for the springs. Once one knows the difference, one can load down the front to get to the weight of the spring rating (I guesstimate that my front needs about 400 lb more weight). To test this out, I plan to add steel plates to the front (ahead of the front wheels), after I found the exact required weight by going to a truck scale.
Once weighted down to the proper weight, I will take my motorhome on a long trip and see how this does. That experience I will use to change the springs in the front to compliment my Sumo springs, and hopefully achieve a ride quality that is similar to an air ride.
__________________
Hudsoner is offline   Reply With Quote
Old 11-02-2016, 07:22 PM   #5
Senior Member
 
Brand: Thor Motor Coach
Model: Hurricane 27K
State: California
Posts: 488
THOR #2544
Thanks for the respone. I will look into the Firestone but the Kelderman, although pricey, includes lighter leaf springs. I could do the front first since that is where most of the harshness seems to come from. Time to start saving I guess.

The Kelderman Ford F-53 2-Stage Front Air Suspension System includes a lighter leaf spring pack, upper and lower air bag mounting plates, Monroe shocks, track bar (2006 & newer), air line, fittings,
__________________
This post is opinion based on experience.
2015 Hurricane 27K
2013 Sea Ray 220SD
brucev 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


» Featured Campgrounds

Reviews provided by

Disclaimer:

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




All times are GMT. The time now is 07:30 AM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0 PL2
×