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Looking for info(helper springs)
#11
Each airbag helper spring kit's mounting brackets are a bit different depending on vehicle.

On mine they basically replace the little rubber bump stops that prevent the axle from hitting frame rails.

While My Firestone riderite kits claimed No drill, well they use self drilling bolts. What fun that would be using a rachet. I used the drill plenty.

Airlift also sells kits for vehicles.

I usually keep 15LPSI in passenger side and 25 drivers side just to have it levelled out. 100PSI in both bags raises the rear end over 4 inches and it rides incredibly stiff.

100PSI in one bag and 0 in the other makes street parking much more level for sleeping.

I have both schrader valves inside my van, and can adjust from within with my MV-50 12v air compressor. They sell kits that one can flip switches to raise or lower airbag PSI.

The airlines use these simple push to connect fittings. Requires a clean perpindicular cutof airhose , insert hose into fitting, then pull back on hose and the little sliding collet. This last portion is not in the directions but insures a better seal, as opposed to airpressure itself once everything is plumbed.

The kit will say to always keep a minimum of 5 or 10PSI in the bags when driving.

The exhaust pipe will likely be in the vincinity of the airbags. The kits include a heatshield to protect the one airbag. Airlift on my kit attached a shield to the E pipe itself, the firestone kit used a shield on the mounting plate of the airbag. I used a Pizza tray amd rivets to enlarge this heatshield, and also had to cut my exhaust and extend its length about 1 inch for proper clearance.

Steel cans and hose clamps are still holding it together 11 years later, though I replace the cans every few years.

The kits say a certain PSI loss is to be expected. i forget the amount but mine leak a fraction of this amount..

I very much like the adjustability, and handling of my Van with these airbags.

I am glad i went this route over a new Leafspring or hellwig helper springs, although I believe that a leaf pack tuned fo r the load would likely be the best riding handling and most durable set up.

I had some cheezy gabriel shocks when i first got the airbags and they were not able to properly dampen the bouncier ride with teh airbags.

KYB Gas A Just shocks improved that dramatically. They are not user adjustable.
Bilstein shocks are said to be even stiffer and have more dampening, at 2x the price of KYB gas a just.

The handling was dramatically improved and on the highway it was very noticeable that the big rigs were not pushing me out of the way nearly as badly and it was easier to stay in the lane.

I did have issues with the first airbags from the Firestone kit, but Summitt racing sorted it out and the second pair do not leak and have been in place for 11 years.

No personal experience with the kits from Airlift.

One can find the specific kits directions for their vehicle from both companies and see how they mount the upper and lower brackets and make the better choice for themselves/ their vehicle.

Do NOT use shocks which have coilover springs or use Air to increase load carrying ability.
The shock mounting brackets and hardware of the shock were never intended to support the weight of the vehicle. A shock can only exert so much force on these points but a giant spring or airbag inside the shock itself, can easily exceed the strength of these mounting points/hardware, and mangle them.

Sure someone will come along and say they have used them and they have been 'just fine' for x amount of time. but they are ticking. And should be avoided in a modified camper van/truck, anything that will see offroad conditions.

Once one gets their new helper springs installed, and possibly adjusted, then the headlight aim will be different. Headlight aim is extremely important not only to not blind oncoming drivers with excessive glare, but so the driver can actually see what they need to see at speed. Humans are extremely bad at judging just how well they can see, or not, and any modification they make is not objectively tested, they just subectively insist it is an improvement.

There is a lot of absolute junk marketed out there regarding vehicla forward lighting, much of it illegal and dangerous. It is a different topic, but the short of it is that halogen fixtures need to have halogen bulbs in them. LEDS in halogen fixtures cannot properly focus the light, blind oncoming drivers, and make me machete swinging push you off the road rip you out of your car and smack you silly type of mad.
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  • S Cello (10-18-2018)
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#12
air shocks are bad all around

another option if it rides good as is would be longer shackles to get a couple inches lift,you can only go a couple inches before you have to start thinking about your pinion and drive shaft angles
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  • S Cello (10-18-2018)
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#13
(10-18-2018, 11:06 AM)sternwake Wrote: although I believe that a leaf pack tuned fo r the load would likely be the best riding handling and most durable set up.

If the vehicle has a constant sag, and load, I'd follow this suggestion.

I know we've had several vehicles re-arched and a leaf added. I don't recall it being all that expensive.
I'd guess you'd need to be near a fairly large city to have a choice of spring shops.
You can also purchase an entire new spring assembly.

Then you never have to worry about a leak, or something being near the exhaust, etc. or drilling holes, or overloading mounts.

Durable is good.
Sometimes dweller in 237k miles '07 Grand C-van w/ a solar powered fridge and not much else
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  • S Cello (10-18-2018)
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#14
Thanks for all this info, friends.

I been looking at the Firestone air bags.

https://www.amazon.com/dp/B000CMD23S/ref...B001TNHFN2

It sounds like they might be the ticket.

I'm not gonna be changing the angle of the driveshaft, I think, as I am just looking to get the rear back to a slightly raised position. Maybe just get the van back to level or maybe 1 or 2 inches higher than the front, which is how the van rode before I added all that weight.

I really appreciate the first hand input, it is so helpful.

SW, interesting that you put the air fill schraeders on the inside of the van, it could make life easier for sure. I have a good Viair 300P

https://www.amazon.com/gp/product/B000X9...UTF8&psc=1

in the van that should be good for airing up those bags as well as the tires.
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#15
If you are going do do the airbag install yourself I believe these are the instructions for your kit:

https://riderite.com/-/media/www/riderit...0730920239


Does not appear to have any heatshield.

What appealed to me was the ability to do it myself, the adjustability for different loads, and not having to deal with any outfit or taking it somewhere.
I knew my driver's side had more weight than my passenger side, without my 212Lb ass, and now handling wise, I can't tell. I did one tire scrubbing descent of the sierras NW of Kings Canyon that wold have had any passenger screaming for dear life and only got passed once by a corvette. Fun road!

Do check out the air lift kits too, and get underneath and inspect the area they will be going. and see if there are obstacles to a clean easy install.

Note that when maxing out the bags to 100PSI, i can pump one bag from 25 to 100, then the other bag from 15 to 100, then go back to the first bag and find it at 90psi. Basically two stages to get to the max PSI and max lift.

It comes in handy having that much lift when crawling underneath. I limit how much i drive with that much lift, but if urban camping will pump both upto 100PSI in two stages, before finding my spot, then once parked and in 'stealth' mode I let the street side bag deflate to zero, as opposed to parking and then pumping the curbside bag to 100.

https://www.airliftcompany.com/

In 2011 I rebuilt my front ssuspension with thicker coil springs, which certainly helps handling, and KYB Gas a Justs are on all 4 corners. They are not soft shocks like monroe sensa tracs. Quite firm. I am sure some would prefer less dampening and a softer ride, but i prefer tighter mroe responsive handling, even if it has the aerodynamics of a top heavy brick.
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  • S Cello (10-19-2018)
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#16
I tried Timbren Jounce Bumpers on my Express 2500 cargo van and am mostly satisfied. At around $200 they are pricey for a pair of pads but made a noticeable improvements and are a simpler option to air bags. However on my short bus I’ll go all the way and install air bags.
On my cargo van I noticed the original bumpers were gone missing. The axle had partially crushed the exhaust pipe too because the bumpers were missing. Thanks Chevy! Crumbling rubber and peeling paint were major flaws but forgiveable. Being in a place without much tools I opted for the Timbren bumpers. They leveled the van under load and increased stability. Scrap of 2x4 lumber can be used to seat the bumper. Just lower the vehicle down with a block between the axle and bumper and it will be forced into the seat. A little silicon spray helps it to slide into the seat. Or soapy water or whatever you have. Except corrosive brake fluid lol.
The cargo van needs shocks so I’ll try KYB gas adjust and see what that does.
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