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

Go Back   iRV2 Forums > THE OWNER'S CORNER FORUMS > National RV Owner's Forum
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Thread Tools Search this Thread Display Modes
Old 09-07-2021, 02:43 PM   #1
Tiffin Owners Club
Join Date: Apr 2017
Posts: 33
2005 Dolphin 5342 ride quality

Rides on a w-22 chasie, upgraded to sumo yellow bump stop/spring, Koni shocks. But still get jolted on the freeway over rough roads. Any type of front air spings or suspension suggestions?
jeff357 is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free! RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 09-10-2021, 08:52 AM   #2
Senior Member
CamJam1's Avatar
Join Date: Mar 2019
Location: Arizona
Posts: 1,911
My 2004 Dolphin W-22 has Sumos and isn't bad at all. Only difference is that I have Bilstein shocks on mine.

What air pressure do you run? I start out in the morning at 85 psi front and 90 rear. I have Toyo tires in front now, which seem to ride a little softer than the Sumitomos they replaced. i do notice the ride gets a little harsher as the tires heat up and the pressures rise. On hot days I'll end up at 96-98 psi front and 100-102 rear according to my TPMS.

I think large potholes or expansion joints are going to cause a suspension crash no matter what, but my W-22 rides much better than my last P-30 motorhome. The Sumo Springs do really seem to help in that regard.
2004 National Dolphin LX 6320, W-22, 8.1, Allison 1000, Front/rear "Trac" Bars & Anti-sway Bars, Sumo Springs, Roadmaster Reflex Steering Stabilizer, 2005 PT Cruiser Toad
CamJam1 is offline   Reply With Quote
Old 09-10-2021, 02:37 PM   #3
Senior Member
Belgian's Avatar
National RV Owners Club
Join Date: Jun 2006
Location: Manhattan Beach, CA
Posts: 695
Tire PSI, Tire PSI, Tire PSI

Remember this is not a car or even a pick up, it's a 20,000# box driving down the road. Also, you and your wife are sitting right over the front axle and the impacts are sent right up your spine. Just the nature of the beast.

Wouldn't trade my Beast for anything (and I've looked)

I have the Koni shocks also. great shocks. I run slightly different tire PSI than CamJam, Front 90 rear 85.

Best of luck and safe travels. Enjoy
Steve & Jeri
2004 Dolphin 5342
2000 Jeep Cherokee 4X4
Belgian is offline   Reply With Quote
Old 09-10-2021, 07:05 PM   #4
Senior Member
National RV Owners Club
Join Date: Jul 2018
Location: Melbourne, FL
Posts: 252
I have a 2006 SeaBreeze LX. I run Koni's on the front, Toyo tires, and 75psi front, 80 psi rear based on out actual weight fully loaded. Still can be jarring at times.

SeaBreeze LX 8321
FLRosebud is offline   Reply With Quote
Old 09-11-2021, 07:47 AM   #5
Tiffin Owners Club
Join Date: Apr 2017
Posts: 33
Thanks for the replies

Running 82 psi all the way around. Front 2 have been replaced with Toyos vs the over priced michelins. Konis much better than the the bissteins. tru track & steering stabalizer have imprved the wandering steering. Love the turninging radius over my last f-53.
jeff357 is offline   Reply With Quote
Old 09-14-2021, 05:22 PM   #6
Junior Member
charlespierc's Avatar
Ford Super Duty Owner
Retired Fire Service RVer's
Join Date: Jul 2015
Location: Puyallup WA/Florence AZ
Posts: 12
air bags

I installed Air Ride air bags and keep them inflated to 35p.s.i. Got them from e trailer.
charlespierc is offline   Reply With Quote
Old 09-15-2021, 07:04 PM   #7
Tiffin Owners Club
Join Date: Apr 2017
Posts: 33
Thanks, found them
jeff357 is offline   Reply With Quote

dolphin, quality, ride

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools Search this Thread
Search this Thread:

Advanced Search
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

Similar Threads
Thread Thread Starter Forum Replies Last Post
National Dolphin :: 2004 National Dolphin 5342 gvette85 iRV2 Owners Registry 0 09-30-2018 06:47 PM
Dolphin :: 2005 National Dolphin 5342 Goyotamon iRV2 Owners Registry 0 08-01-2018 10:47 AM
Start Topic 2005 Dolphin 5342 (W-22 Chassis) Steers Poorly ralphl Workhorse and Chevrolet Chassis Motorhome Forum 25 12-19-2010 06:11 PM

» Featured Campgrounds

Reviews provided by

All times are GMT -6. The time now is 01:51 AM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2022, vBulletin Solutions, Inc.