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Old 04-22-2018, 07:13 PM   #1
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Default Front Coil Springs - 2015 RT210

I live "up a rutted, potholed, dirt road" - great sanctuary bordering a cove of a lake. Three times I have had problems, once with our road and another in a local gas station, and yet another time I had a real dip at some restaurant and heard the scraping. I have read other inputs on raising RT's and your comments/recommendations, and decided I would go this route, before the skirting gets ripped off or cracked or do some other damage.
I went to MOOG - they do not have Springs for this Year Model. They provided me with this info:
"Constant Rate Springs: 4.06" Inside Diameter; 1.03" Bar Diameter; 1570 lbs/in. spring rate; 5934 lbs. load; 14" Installation Height; 17.78" Free Height; End Type 1 - Tangential; End Type 2 - Tangential.
Can anyone make a recommendation on Front Springs, and this Description - is it for having some fabricated....I am not remotely knowledgeable about this, so I come to the experts.

Also, I went to AutoAnything to start the search, only to find they don't have Moog. They had TuffTruck Coil Springs - Super Coils-SSC-14 - Front H-D Stock Replacement = #403.88. It shows it fits this Year/Model.

To lift the rear, I was looking at:
Firestone Air Bag Suspension Kit (Sport Ride Rear Suspension Kit) Express 3500 Single Wheels $329.99.

Plan on changing to the Bilstein Shocks: B6-24-22-1948(Rear), 24-187435(Front).

Like I mentioned above, I would appreciate any recommendations/ guidance you can give me to start this "adventure." Due to health, we plan on using it as a daily driver, along with any trips we can get in. Thank again, Ron
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Old 04-22-2018, 08:42 PM   #2
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Wow, the application charts for the springs really go to crap after 2010, it appears.

Supersprings, Tufftruck and a few others show the same springs all the way from 2003 to the present. MOOG goes to 2006 and Husky I think went to 2010.

I looked at the part numbers for the control arms, both upper and lower, for 2010 and 2015 and they were identical, as were the knuckles, so the best guess is that everything is the same all the way up in the spring area.

The MOOG you describe that they recommended is likely the MOG-8004, which is the one that is normally recommended for the Chevies these days. They will give about 1.75" on a 190 and a bit more than that usually on a 210 which is normally a bit lighter on the front than a 190.

The Superspring SSC-14 looks to be nearly identical to the 8004 but more expensive most places.

I would put 90% confidence the 8004 or equivalent would be what you need, but there is no 100% proof of that until they go to put them in.

I like airbags in the rear, personally, others prefer bigger springs. The airbags allow some tuning and leveling, which I like. Firestone makes good bags mount to the bottom of the shackles and sit in front of the axle, rated at 3500# capacity at 100psi. Airlift bags mount above the axle and are rated at 5000# at 100 psi so they would run at less air pressure for the same lift. With Airlift you need to get the model for the boxed frame that is usually called out for passenger vans, even though ours are cargo vans. We have had both brands of bags in our van, and I would give the Airlift a small preference but not be a lot.
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Old 04-23-2018, 01:26 PM   #3
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Airlift has rear bags with an internal bumpstop. That might prove to be a helpful feature should a bag ever leak.

If getting air bags I'd suggest having it fully plumbed in to a compressor controlled from inside the coach. I skipped that step to save money and it works for me as I have a compressor and check pressure often but at some point easy and convenient is the better way to go.

I have Moog front coils, rear Airlift bags and Bilstein shocks all around on my old van and have never regretted the money spent or the effort it all took to install. The van has a sport like handling now compared to before.
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Old 04-23-2018, 02:03 PM   #4
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Here's a table with all of the Moog spring specs:
Attached Images
File Type: jpg Moog.jpg (228.6 KB, 30 views)
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Old 04-23-2018, 02:20 PM   #5
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We are set up much like Marko. He had the first of the Airlift bags with the internal bumpstops in them, and we have changed to them also. They are very nice, and you don't have to worry if you get a leak of bag failure.

The differences we do have are that we do have a compressor onboard, but didin't run the controls to the coach. We use the manual controls mounted inside the side storage pod. We have never seen the need to adjust while driving. Having the compressor onboard is nice as you can also get some leveling when camped.

If you do use the Airlift bags with the bumpstops, you also have the possibility of removing or rearching, the overload leaf on the rear springs to prevent "slapping" of it on the rest of the springs on big bumps. We did that a couple of years ago (removed the overload leaf) and have been very happy with the results.
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Old 04-23-2018, 02:21 PM   #6
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If this info on eTrailer is correct:

https://www.etrailer.com/question-127430.html

Quote:
The free hanging length of the spring is 17-3/4 inches, the width of the springs is approximately 5-13/16 inches, the wire diameter is 1-1/16 inches, the spring rate is 2,026 pounds, and there are 8.8 turns in the spring.
Then the Supersprings Super Coil wire is 1/32" greater diameter than the Moog 81004 so it will be stiffer. The spring rate is listed as 2,026 lbs in that etrailer answer so it is greater than the Moog 81004 at 1,570 lbs.

I'd be more inclined to try the Moog 81004 as I'd be concerned that the SSC-14's could be too stiff. The 81004 and SSC-14 coils are almost exactly the same height.
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Old 04-23-2018, 06:33 PM   #7
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As always, thank you for your help. After reading your recommendations, I plan on going with the Moog Coils, I don't need a stiffer ride, and Booster said that the equipment match up was the same. I plan also to get the Bilsteins. I had originally said about using Firestone Air Bags, but see they will require drilling, and now, after your inputs, I will opt for AirLift. Can I ask for any particular Model recommendation, i see they advertise a 5K Rear Leveling Kit, a 5K Ultimate, and a LoadLifter 7500XL. Marko mentioned the onboard compressor, any recommendations there would be appreciated; I like that idea of making leveling up easier. FWIW, I do carry a small 110V compressor, and in my situation, it might be the quickest. As I mentioned, we don't do a lot of camping, but we have been finding it better for travel......ideal! Thanks again, Ron
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Old 04-23-2018, 07:21 PM   #8
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This looks to be the Airlift kit you would need. 5000# capacity and with the internal bump stop.

https://www.airliftcompany.com/shop/88205/

If you are already carrying a portable, you likely could pass on the built in compressor. They are expensive.

When you have the bags put in, it is a good idea to have them use two fill valves so you can use them for side to side leveling, as the Chevies usually need some.
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Old 04-23-2018, 07:56 PM   #9
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I don't know much about the onboad compressor systems - sorry. I'd likely go with an Airlift compressor. As Booster pointed out - being able to set different pressure for each bag is the way to go for more precise leveling. I know one bag gets a bit more pressure on my van to make the wheel well heights the same.

Airlift often has mail in rebates: https://www.airliftcompany.com/support/rebates/

It's worth checking that page. The current rebates look to be for purchases from a professional installer but that's not always the case. I got some money back via mail in rebate from my purchase of Airlift bags off Amazon.
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Old 04-23-2018, 10:10 PM   #10
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Just an update. Since I can't do the install anymore, I checked around for an Air Lift Retailer/Installer. I found an Off Road Outfit; called some friends in the area and they give them good remarks - been at the same location for 40+years. They also show Bilstein Shocks and in my e-mail I said I wanted to install the Moog Coils, and if they could and would, I could order and have them available. If they can't do the springs, there are a load of outfits nearby. When they call, I want to drive up for a face-to-face, and if they have the Air Lift available, and their compressor hook-up, I would like to see it....just so I am aware of what it is and visualize where things would go. I am going for the dual valves, but like to see the options. I will let you know the outcome of the call....I really want to get this done....I can see that front/rear end getting busted up (it is a whole lot thinner than I had on the '05). Again, thanks for everything. Ron
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