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air shocks typical psi ? #105381
08/15/08 04:37 PM
08/15/08 04:37 PM
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wisconsin
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chuckpolzin Offline OP
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hey all ,

I have a 67 belvedere that has a set of air shocks on the back that i have no idea as to what model number or anything as far as i can see. They are a silver color and im assuming are pretty standard. There is a valve in the trunk to pump them up, I have noticed my ride is sagging a bit since the winter and have pumped it up with air , my question is can i over inflate these and risk blowing up a valve or do they have some kind of safety where they just blow off the excess air.

If they indeed can be overinflated , what on average would be a safe PSI i could pump these up to since i have no idea as to a model number. I have never had air shocks on a car before and I have no idea what these things range for PSI capability, any help would be awesome , thanks

Re: air shocks typical psi ? [Re: chuckpolzin] #105382
08/15/08 04:43 PM
08/15/08 04:43 PM
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dogdays Offline
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Air shocks are a crutch. You need better springs with the right arch, and real shock absorbers. Shock mounts were never intended to carry big loads.
My 2 cents worth...
R.

Re: air shocks typical psi ? [Re: chuckpolzin] #105383
08/15/08 04:44 PM
08/15/08 04:44 PM
Joined: Mar 2007
Posts: 3,285
West Coast, USA
jbc426 Offline
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You would be better served by replacing them with some high quality shocks. If you need additional ride hieght. There are better ways to get it. However, if you want to inflate them, try using 5 lbs increments until you get the desired result.


1970 Plymouth 'Cuda #'s 440-6(block in storage)currently 493" 6 pack, Shaker, 5 speed Passon, 4.10's
1968 Plymouth Barracuda Convertible 408 Magnum EFI with 4 speed automatic overdrive, 3800 stall lock-up converter and 4.30's (closest thing to an automatic 5 speed going)
Re: air shocks typical psi ? [Re: chuckpolzin] #105384
08/15/08 04:46 PM
08/15/08 04:46 PM
Joined: Jan 2003
Posts: 32,954
Grand Prairie,Texas
stumpy Offline
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About 40psi. they are not good for raising the car as they are supposed to help the springs when you load the car. Not to replace bad springs. You can put more air,as much as 80psi but you are then setting yourself up for the shocks coming through the floor depending on how strong the mounts are. If you want to get the rear higher then the best bet is to add a helper leaf to the springs or replace them.

Re: air shocks typical psi ? [Re: jbc426] #105385
08/15/08 04:48 PM
08/15/08 04:48 PM
Joined: Oct 2005
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Dexter, Michigan
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copper67440 Offline
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They most likley can and will take up to @ 125#, But that'll put the rear up pretty good. Probably higher than you want.

Re: air shocks typical psi ? [Re: stumpy] #105386
08/15/08 04:49 PM
08/15/08 04:49 PM
Joined: Apr 2008
Posts: 1,195
Snowing in the north!
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Dart 340 Offline
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Snowing in the north!
I have traction bars on mine and have air shocks not
by choice....
I will be removing them as some point but need to make sure standard shocks will be the right height.
That said, I run about 60-65 lbs. As stated above if
you put too much air in them you will be punching out the shock towers.

Re: air shocks typical psi ? [Re: Dart 340] #105387
08/15/08 06:53 PM
08/15/08 06:53 PM
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Posts: 58
wisconsin
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chuckpolzin Offline OP
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wisconsin
yeah sounds good i had the feeling i might need to freshen up the susp. on my ride, for the mean time how does this look as far as a typical belv stance goes, maybe im just too into a beefed up looking rear,

http://i233.photobucket.com/albums/ee317/3snakes1charm/DSC00232.jpg

4621786-DSC00232.JPG (474 downloads)
Last edited by chuckpolzin; 08/15/08 06:56 PM.
Re: air shocks typical psi ? [Re: chuckpolzin] #105388
08/15/08 07:03 PM
08/15/08 07:03 PM
Joined: Jan 2003
Posts: 1,359
Buzzard County, FL
IronWolf Offline
pro stock
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The thing is , the weight of the body is borne by the torsion bars and leaf springs.

Once ago, in a galaxy far, far away, somebody with a rot-box had the upper shock mounts punch through because of rampant corrosion. He posted for eons about this, and it passed into Mopar "lore" - air shocks are bad. This is called "groupthink". LMFAO

There are other myths...

Re: air shocks typical psi ? [Re: IronWolf] #105389
08/15/08 07:15 PM
08/15/08 07:15 PM
Joined: Jan 2003
Posts: 1,359
Buzzard County, FL
IronWolf Offline
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Oops - Regarding the original posting : 15 - 20 PSI in the air shocks works for me.

Re: air shocks typical psi ? [Re: IronWolf] #105390
08/15/08 07:26 PM
08/15/08 07:26 PM
Joined: Jan 2003
Posts: 32,954
Grand Prairie,Texas
stumpy Offline
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Grand Prairie,Texas
That stance looks good. As along time mechanic who lived in the north I've seen more than one car with the shocks pushed through the floor. Yes they were rusted cars but it does happen. It's not a myth it's the truth. Using salt to clear icy roads causes a lot of rusted weak floor pans. look at all the guys having to replace trunks and floor pans. Shocks were not designed to support the weight of a car.

Last edited by stumpy; 08/15/08 07:34 PM.
Re: air shocks typical psi ? [Re: chuckpolzin] #105391
08/15/08 07:37 PM
08/15/08 07:37 PM
Joined: Jan 2004
Posts: 921
Chicago illinois
ChinooK440 Offline
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Quote:

yeah sounds good i had the feeling i might need to freshen up the susp. on my ride, for the mean time how does this look as far as a typical belv stance goes, maybe im just too into a beefed up looking rear,

http://i233.photobucket.com/albums/ee317/3snakes1charm/DSC00232.jpg





Nice car

The ride height in that picture is hard to judge since the car is on an incline
but it doesn,t look to high to me at all , i,d break out the compressor

i,ve seen my share of damaged shock mounts on SOLID cars from air shock abuse,plus they ride like a horse wagon but with low p.s.i. you sould be fine for a while .

Re: air shocks typical psi ? [Re: ChinooK440] #105392
08/15/08 08:05 PM
08/15/08 08:05 PM
Joined: Jan 2003
Posts: 11,501
delivering your oil
nutso suave Offline
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delivering your oil
i was under the impression that air shocks work very well if they are not overpressurized... so 15-20 psi (not 20-25 psi) is a normal amount?

didn't lincolns and those mark viii factory hot rods have air shock suspensions?

Re: air shocks typical psi ? [Re: nutso suave] #105393
08/15/08 08:52 PM
08/15/08 08:52 PM
Joined: Nov 2004
Posts: 25,050
Texas
GoodysGotaCuda Offline
5.7L Hemi, 6spd
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add-a-leaf would be a better method for helping old springs rather than the air shocks. As mentioned, they're not going to go through the floor if you use "AALs"


1972 Barracuda - 5.7L Hemi, T56 Magnum 6spd - https://www.facebook.com/GoodysGotaHemi
2020 RAM 1500
[img]https://i.imgur.com/v9yezP9.jpg[/img]
Re: air shocks typical psi ? [Re: nutso suave] #105394
08/15/08 10:01 PM
08/15/08 10:01 PM
Joined: Jan 2003
Posts: 32,954
Grand Prairie,Texas
stumpy Offline
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Quote:

i was under the impression that air shocks work very well if they are not overpressurized... so 15-20 psi (not 20-25 psi) is a normal amount?

didn't lincolns and those mark viii factory hot rods have air shock suspensions?




I believe they are air bags not air shocks. Much different deal. Most of those old air shocks didn't even notice 20 psi. Over pressure on air shocks is 90+ psi.

Re: air shocks typical psi ? [Re: stumpy] #105395
08/15/08 11:36 PM
08/15/08 11:36 PM
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Posts: 1,377
Houston,Tx.
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Lee446 Offline
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The Lincoln MK 8s did use an air shock type suspension on the front, air bags on the back and it worked pretty good. I have run air shocks on my cars for years and have had zero problems with them. If they beat out the mounts, you had bigger problems anyway. What is worse is topping out the shocks on a high performance car but no one on here ever claims that happened to them. I have run SS springs with drag shocks all around and then swapped them all back to stock type gas on front and the airshocks (with extensions on back to stop topping out on launch) My mid 11 second street car saw NO difference in 60 ft or anything else and I kept very good records while running the bracket program at Houston for years, and was getting about 6" of air on launch. Load up several friends and put their gear in the trunk, add 25# of air and take off on a trip without looking like a low rider. Air shocks get a bad rap from many of the experts here, but most have little or no experience with them. When they became popular in the late 60's, early 70's there were many articles in the mags about using them at the track. By running seperate air lines, you could preload your right rear tire for a better launch. They are not a panacea for a worn out rusted out car, but used properly, they are a usefull addition for many street/strip cars.

Re: air shocks typical psi ? [Re: Lee446] #105396
08/16/08 12:46 AM
08/16/08 12:46 AM
Joined: Apr 2007
Posts: 2,327
Glendale, AZ
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69L78Nova Offline
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My Satellite already had them installed by one of the previous owners when I got it, but I keep mine at 50psi. I would never actually spend money and buy them myself.


1969 Nova
454/M21/3.31
Mild mid-11 second weekend cruiser

1994 F150 XLT Super Cab 2WD
5.0/4R70W/3.55
(Daily driver)
Re: air shocks typical psi ? [Re: Lee446] #105397
08/16/08 08:16 AM
08/16/08 08:16 AM
Joined: Nov 2004
Posts: 25,050
Texas
GoodysGotaCuda Offline
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Quote:

The Lincoln MK 8s did use an air shock type suspension on the front, air bags on the back and it worked pretty good. I have run air shocks on my cars for years and have had zero problems with them. If they beat out the mounts, you had bigger problems anyway. What is worse is topping out the shocks on a high performance car but no one on here ever claims that happened to them. I have run SS springs with drag shocks all around and then swapped them all back to stock type gas on front and the airshocks (with extensions on back to stop topping out on launch) My mid 11 second street car saw NO difference in 60 ft or anything else and I kept very good records while running the bracket program at Houston for years, and was getting about 6" of air on launch. Load up several friends and put their gear in the trunk, add 25# of air and take off on a trip without looking like a low rider. Air shocks get a bad rap from many of the experts here, but most have little or no experience with them. When they became popular in the late 60's, early 70's there were many articles in the mags about using them at the track. By running seperate air lines, you could preload your right rear tire for a better launch. They are not a panacea for a worn out rusted out car, but used properly, they are a usefull addition for many street/strip cars.




You do know that the Lincoln was designed to run air-struts and not just tossed onto a now 30 year old car. Right? Mercedes Benz ran them for awhile as well. I dont think the concern is for 60' in a drag car, but more of the increased load on the upper shock mounts in the rear of the car. Pictures have been posted by 'non-experts' running air-shocks on some not-so-new mopars, they show clearly going through the back of the trunk. Cars were just not plain designed to carry the load there (unlike the Lincoln you mentioned), it was meant for the springs.

While thats great your drag car doesn't mind the air shocks. The concern of the thread is most street Mopars get beat-up in inadequate stregnth places. I've run them on my car, there is no way that severe of a ride when 'jacked up' was anything but bad for my car. They were on a very breif time, and swapped for the proper leaf springs to be used on the street. Your drag car isn't hitting speed bumps, rail road tracks, dips, pot holes, driveways, etc, etc.

-Mike
"Non-Expert at Air Shocks"


1972 Barracuda - 5.7L Hemi, T56 Magnum 6spd - https://www.facebook.com/GoodysGotaHemi
2020 RAM 1500
[img]https://i.imgur.com/v9yezP9.jpg[/img]
Re: air shocks typical psi ? [Re: GoodysGotaCuda] #105398
08/16/08 11:09 AM
08/16/08 11:09 AM
Joined: Jan 2003
Posts: 32,954
Grand Prairie,Texas
stumpy Offline
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I used to use them in the 60s and I do know what they are like on a street car on rough roads. Which is an entirely different situation then a drag car on a very smooth surface.. Yes they can be a good addition to a drag car when use correctly.

Re: air shocks typical psi ? [Re: stumpy] #105399
08/16/08 12:55 PM
08/16/08 12:55 PM
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Houston,Tx.
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Lee446 Offline
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Sorry, you misunderstood. My streetcar is bracket raced. When I say street car, I mean driven in the 98 and 99 Hot Rod Power tour, driven from Houston to the Woodward Dream Cruise and back and driven for the last 20 years with airshocks on it. They serve the purpose they were designed for and were factory optional on some cars, Ford station wagons being one of them. Just because you have had bad experiences with them, or known people who misused them, does not mean they are not a viable shock for a street car.

Re: air shocks typical psi ? [Re: Lee446] #105400
08/16/08 01:29 PM
08/16/08 01:29 PM
Joined: Jan 2003
Posts: 32,954
Grand Prairie,Texas
stumpy Offline
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I'm not against air shocks when used correctly as a suppliment to the suspension as a overload helper. Or as a suspension tuning tool. I am speaking more about the guys that use them to jack the car up in the air instead of using the correct springs. These are the ones that beat the shock mounts out. The ones that run way too much pressure and look like a Kangaroo going down the street.

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