RV News RVBusiness 2021 Top 10 RVs of the Year, plus 56 additional debuts and must-see units → ×
 

Go Back   Thor Forums > Thor Tech Forums > Motorhome Tech Topics
Click Here to Login
Reply
 
Thread Tools Display Modes
 
Old 03-11-2018, 03:58 PM   #21
Senior Member
 
Brand: Still Looking
State: Texas
Posts: 4,819
THOR #2121
Quote:
Originally Posted by TyCreek View Post
I find it odd that this thread has many handling enhancement references but not one that actually "fixes" wag (that some call sway). ....cut....
A lot of posts seem to use terms interchangeably, but I expect most use "sway" as meaning roll, or side-to-side movement; or leaning on turns or in cross winds.

Comparing bump stops to Sumo springs is odd also since they have such different purposes. Granted, Sumos are sometimes bolted in place of bump stops for ease of installation, but the two are functionally very different by design.
__________________

__________________
Chance is online now   Reply With Quote
Old 03-11-2018, 05:42 PM   #22
Senior Member
 
TyCreek's Avatar
 
Brand: Thor Motor Coach
Model: Axis 24.2
State: Idaho
Posts: 532
THOR #1944
Sumo or Timbren provide the purpose of a bumpstop plus utilize the space to also provide increased spring rate. Not the "best" remedy for increased spring rate of course, but they're cheap!

As a side benefit ... get it "side" lol ... the more engaged a Sumo/Timbren is, the more play dampening they provide. This dampening can help tame bushing play or spring flex. Again, not the best band-aid for these conditions though they do work to help reduce those factors.
__________________

__________________
Axis 24.2 "was" tug'n a JK
TyCreek is offline   Reply With Quote
Old 03-11-2018, 06:07 PM   #23
Senior Member
 
gnach's Avatar
 
Brand: Thor Motor Coach
Model: Axis 25.4
State: California
Posts: 633
THOR #6582
Quote:
Originally Posted by TyCreek View Post
...snip...

As a side benefit ... get it "side" lol ... the more engaged a Sumo/Timbren is, the more play dampening they provide. This dampening can help tame bushing play or spring flex. Again, not the best band-aid for these conditions though they do work to help reduce those factors.
Then it's best to use the spacer provided for the rears to fully engage them? I couldn't determine if it would make the ride too stiff.
__________________
I'm wearing trifocals now but my hindsight is 20/20.
*************
Bilsteins and Sumos front and rear...HUGE! FatMat and Hoodliner...HUGE!
Hellwig sway bars F&R, 235/85 Hankook ATM, alignment...HUGE!!!
Battery watering, 260watts Solar and BigFeets to make life easier.
gnach is offline   Reply With Quote
Old 03-11-2018, 06:54 PM   #24
Senior Member
 
Miramar Owner's Avatar
 
Brand: Thor Motor Coach
Model: Miramar 34.4
State: Iowa
Posts: 668
THOR #4488
Quote:
Originally Posted by TyCreek View Post
I find it odd that this thread has many handling enhancement references but not one that actually "fixes" wag (that some call sway). Consider a track bar or panhard rod. It prevents solid axel side to side spring flex movement caused by external forces like wind, passing vehicles and toad.
I agree. The truck place I took mine to installed the Safe-T-Plus and LARGE diameter bar on the rear. Meeting or passing semis with my Miramar causes no issues at all. Tail wag and sway is all but gone. Cross winds are still there but the gusts are controlled by the Safe-T-Plus which gives me time to respond.
__________________
Miramar Owner is offline   Reply With Quote
Old 03-11-2018, 07:30 PM   #25
Senior Member
 
Brand: Thor Motor Coach
Model: 2017 Thor Vegas 25.2
State: Indiana
Posts: 297
THOR #7993
Quote:
Originally Posted by TyCreek View Post
I put the one from SuperSteer/Henderson on my Axis soon after I got it and that's all I did for a couple years. I think Blue Ox was the other one for the E-series that I was considering. FWIW ... I didn't choose based on what one I thought might be better ... it was a cheapest at the time choice.
Is there any way you could get the model number? I still can't find the right one.
__________________
jb1911 is offline   Reply With Quote
Old 03-11-2018, 10:49 PM   #26
Senior Member
 
Baddad53's Avatar
 
Brand: Thor Motor Coach
Model: Axis 25.3
State: California
Posts: 443
THOR #2526
Sumosprings Front Installation

Since I have a Bigfoot Leveling System, I took all of 10 minutes. All you need is a long 10mm socket to take off the existing bumper - the screw is recessed inside.

The size difference is 2x. I took the picture with my cell phone while I was under the RV.


The Sumosprings comes with a washer and locking nut. But you can only install it on the passenger side. The driver side the frame is enclosed on all sides. The spring screws into the existing hole so DON'T FOLLOW THE INSTRUCTIONs and screw the old bolt in and out a few times.


Passenger side top you can see the screw coming through.


Test ride will have to wait.
__________________
2016 Thor Axis 25.3 w/ 2011 2dr Wrangler in tow
Demco tow bar with Patriot braking
Bigfoot Automatic Levelers.
Baddad53 is offline   Reply With Quote
Old 03-12-2018, 02:08 AM   #27
Senior Member
 
TyCreek's Avatar
 
Brand: Thor Motor Coach
Model: Axis 24.2
State: Idaho
Posts: 532
THOR #1944
Quote:
Originally Posted by jb1911 View Post
Is there any way you could get the model number? I still can't find the right one.
SS402 SuperSteer Trac Bar E350 was my early '15 order.
__________________
Axis 24.2 "was" tug'n a JK
TyCreek is offline   Reply With Quote
Old 03-12-2018, 02:56 AM   #28
Senior Member
 
TyCreek's Avatar
 
Brand: Thor Motor Coach
Model: Axis 24.2
State: Idaho
Posts: 532
THOR #1944
Quote:
Originally Posted by Miramar Owner View Post
... but the gusts are controlled by the Safe-T-Plus which gives me time to respond.
Consider the opposite ... Since STP is a heavily dampened shock on your link arm (with center bias), it isolates what is felt in the steering wheel. So what it really does, is keep the driver from over reacting to what is felt. However, dampening (road isolation) actually contributes to "less" response time.
__________________
Axis 24.2 "was" tug'n a JK
TyCreek is offline   Reply With Quote
Old 03-12-2018, 04:55 AM   #29
Senior Member
 
Brand: Thor Motor Coach
Model: 2017 Thor Vegas 25.2
State: Indiana
Posts: 297
THOR #7993
Quote:
Originally Posted by TyCreek View Post
SS402 SuperSteer Trac Bar E350 was my early '15 order.
Really appreciate it, thanks.
__________________
jb1911 is offline   Reply With Quote
Old 03-12-2018, 05:43 AM   #30
Senior Member
 
Brand: Thor Motor Coach
State: California
Posts: 271
THOR #10354
Quote:
Originally Posted by Lagrandd View Post
I’m looking for input. On our 2017 Vegas (E450) we have added Safetplus and front and rear sway bars. We have had the alignment adjusted to the recommended positive tow-in settings.

All this resulted in a much improved driving experience with noticeable improvement in reduced “push” from passing semis and less sway during turns or on uneven roads. Driving in wind conditions less than 15 mph is no problem.

So, my question is; is there further improvement available that would help in 20 - 25 mph cross winds? Would the sumo springs, front / rear or both provide further improvement? Anything else that would be recommended?

Thanks in advance for any input!
The SSF-106-40 SumoSprings are listed for 500lbs and Ford E350 (vans I assume). These may work for awile but do not appear to be rated for the chassis we are talking about here. The load on each front axle is 2000lbs. Please educate me if I am wrong...I know these will work in conjunction with the E450's standard springs.
__________________
Thehobe1 is offline   Reply With Quote
Old 03-12-2018, 01:07 PM   #31
Senior Member
 
Miramar Owner's Avatar
 
Brand: Thor Motor Coach
Model: Miramar 34.4
State: Iowa
Posts: 668
THOR #4488
Quote:
Originally Posted by TyCreek View Post
Consider the opposite ... Since STP is a heavily dampened shock on your link arm (with center bias), it isolates what is felt in the steering wheel. So what it really does, is keep the driver from over reacting to what is felt. However, dampening (road isolation) actually contributes to "less" response time.
Hmmm...having driven 12,000 miles with it installed I can tell you it doesn't feel that way. By keeping equal pressure pushing against both wheels it keeps the wheels going straight. I feel the gusts hit the side of the RV but it doesn't force me to counter steer abruptly just to stay in my lane. I feel the wind and steer in to it but no more with a sense of panic. Not to mention the advantage in the event of a blow out.
__________________
Miramar Owner is offline   Reply With Quote
Old 03-12-2018, 02:39 PM   #32
Kev
Senior Member
 
Kev's Avatar
 
Brand: Thor Motor Coach
Model: Windsport
State: Florida
Posts: 740
THOR #3918
I have had them installed in two coaches and don't find any reduction in response time at all.
__________________
Kev is offline   Reply With Quote
Old 03-12-2018, 02:46 PM   #33
Senior Member
 
Miramar Owner's Avatar
 
Brand: Thor Motor Coach
Model: Miramar 34.4
State: Iowa
Posts: 668
THOR #4488
Quote:
Originally Posted by Kev View Post
I have had them installed in two coaches and don't find any reduction in response time at all.
If you felt no improvement on the first coach, why install on the second?
__________________
Miramar Owner is offline   Reply With Quote
Old 03-12-2018, 06:25 PM   #34
Senior Member
 
Tearstone's Avatar
 
Brand: Thor Motor Coach
Model: 2017 Miramar 34.4
State: Florida
Posts: 295
THOR #9721
When you all are purchasing Sumo springs, are you doing the front AND/OR rear?
__________________
Russ Sanderlin
USMC Veteran
2017 Miramar 34.4
RV Travel Bug
Tearstone is offline   Reply With Quote
Old 03-12-2018, 10:26 PM   #35
Member
 
Lagrandd's Avatar
 
Brand: Thor Motor Coach
Model: Vegas 24.1
State: Missouri
Posts: 58
THOR #5711
I did front and rear. Very pleased so far.
__________________
2017 Thor Vegas 24.1
Safe T Plus, SumoSprings Front and Rear
Hellwig Sway Bars Front and Rear
Lagrandd is offline   Reply With Quote
Old 04-10-2018, 02:51 AM   #36
Senior Member
 
Baddad53's Avatar
 
Brand: Thor Motor Coach
Model: Axis 25.3
State: California
Posts: 443
THOR #2526
Sumosprings front test drive

Finally drove on a short trip with the newly installed front sumosprings. Driving over the Ventura River on the 101 caused my Axis to porpoise with a series of bumps. With the new springs, it stops bouncing after the initial travel. Never had any problem with fishtailing in rear so didn't do the rear springs even with jeep in tow. On turns, I see no difference but I don't corner like I'm in a sports car. Steering with semi passing no difference I can tell but it's not a problem. Ran into gushing winds and don't see any difference. So they worked great for bouncing problem period.
__________________
2016 Thor Axis 25.3 w/ 2011 2dr Wrangler in tow
Demco tow bar with Patriot braking
Bigfoot Automatic Levelers.
Baddad53 is offline   Reply With Quote
Old 04-10-2018, 03:12 AM   #37
Senior Member
 
Whirnot's Avatar
 
Brand: Thor Motor Coach
Model: Vegas 25.2
State: Oregon
Posts: 271
THOR #6934
Quote:
Originally Posted by Tearstone View Post
When you all are purchasing Sumo springs, are you doing the front AND/OR rear?
I did front only, I am very happy, no reason to do the rear. Even though I tow a 5000 Trailer
__________________
Whirnot is offline   Reply With Quote
Old 04-10-2018, 03:46 AM   #38
Senior Member
 
Mr Sunshine's Avatar
 
Brand: Thor Motor Coach
Model: 2016 Vegas 25.2
State: Florida
Posts: 2,220
THOR #1589
Quote:
Originally Posted by Tearstone View Post
When you all are purchasing Sumo springs, are you doing the front AND/OR rear?

Just installed Sumos on the front. Will be testing them on the way to Brooksville this weekend. Already installed Bilstein shocks all around, and the larger bar in the rear and rear Sumos will be next if the expense seems justified.
__________________
I think we need to stop calling it "working from home" and start calling it "living at work!"
Mr Sunshine is offline   Reply With Quote
Old 04-10-2018, 03:00 PM   #39
Senior Member
 
Brand: Thor Motor Coach
State: California
Posts: 271
THOR #10354
Quote:
Originally Posted by Baddad53 View Post
Finally drove on a short trip with the newly installed front sumosprings. Driving over the Ventura River on the 101 caused my Axis to porpoise with a series of bumps. With the new springs, it stops bouncing after the initial travel. Never had any problem with fishtailing in rear so didn't do the rear springs even with jeep in tow. On turns, I see no difference but I don't corner like I'm in a sports car. Steering with semi passing no difference I can tell but it's not a problem. Ran into gushing winds and don't see any difference. So they worked great for bouncing problem period.
Finally a report that makes sense regarding theses "springs". They should only have an effect for larger suspension swings where they would be compressed, otherwise, theyare not in contact with the suspension members. I have seen a lot of testimonials making these units seem like perfect shock absorbers but they are just springs. Thanks for your report.
__________________
Thehobe1 is offline   Reply With Quote
Old 04-10-2018, 03:32 PM   #40
Senior Member
 
Brand: Thor Motor Coach
Model: 2017 Thor Vegas 25.2
State: Indiana
Posts: 297
THOR #7993
Quote:
Originally Posted by Thehobe1 View Post
Finally a report that makes sense regarding theses "springs". They should only have an effect for larger suspension swings where they would be compressed, otherwise, theyare not in contact with the suspension members. I have seen a lot of testimonials making these units seem like perfect shock absorbers but they are just springs. Thanks for your report.
But they ARE in constant contact with the suspension members. There is no space between the suspension and the SS, they are in constant contact.

My experience is that they make a huge difference when cornering, the lean is much less severe.
__________________

__________________
jb1911 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 09:01 PM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2021, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0 PL2
×