PROBLEM Bagged B5

[Oh Damn, it's Sam]

That seems... weird to me, but I'm sure they know what they're talking about. Keep us posted.

[clumsy me]

Max PSI on those bags is 125. At 90, their lifting capability is only about 1100 lbs each, and with the motion ratio of the suspension, they need to be able to lift at least 1000, which doesn't even take into account the angle of the suspension arm. I'd be tempted to throw another 10-20 psi in them and see where the car settles.

After about 100 psi the car doesnt go up much it looks like the bag just goes out instead of up.

I talked to airlift again and sent a bunch of pictures they think something is wrong in the valving of the shock that it is keeping it so low. They might be sending me a new set of rears.

[Oh Damn, it's Sam]

Max PSI on those bags is 125. At 90, their lifting capability is only about 1100 lbs each, and with the motion ratio of the suspension, they need to be able to lift at least 1000, which doesn't even take into account the angle of the suspension arm. I'd be tempted to throw another 10-20 psi in them and see where the car settles.

[clumsy me]

Weird, I didn't know they mounted the bags upside down on the B5! Interesting.

It's not surprising that raising the corner first allows the corner to go higher, but that does tell us you have some additional upward range you could get out of the bag. The problem is, you don't want to drive fully-inflated, as it's extremely hard on the bags, so we're probably going to want to figure out a better solution than just "cram a shitload of air into them."

If you inflate from zero, what pressure is each rear bag sitting at when full?

Yea they mount them upside down because of the way the shock mount is. I dont wanna ride around at full pressure. :/

Inflating from 0 while on the ground I get to about 90 psi then the bag goes more out then up. and that gets me to between 24 - 24.5 ftg. I am aiming for more like 26 area for driving

[Oh Damn, it's Sam]

Weird, I didn't know they mounted the bags upside down on the B5! Interesting.

It's not surprising that raising the corner first allows the corner to go higher, but that does tell us you have some additional upward range you could get out of the bag. The problem is, you don't want to drive fully-inflated, as it's extremely hard on the bags, so we're probably going to want to figure out a better solution than just "cram a shitload of air into them."

If you inflate from zero, what pressure is each rear bag sitting at when full?

[clumsy me]

You have sleeve-style bags in the rear, correct? You should be able to see the full lower lobe / piston if the bag is inflated all the way. But, a picture never hurts either.

EDIT: The bags shown in the B5 kit on Air Lift's website look like they're fully-extended. If that's what your bags look like at ride height, they're all the way up.

yes they are a sleeve style bag.

This is what the bag looks like aired up.


I messing around trying to figure it out and I noticed that if I air the car up with the wheel on the ground I can get up to 24 1/4 ftg BUT if I jack one of the wheels off the ground and air it up with the wheel in the air and then let it down off the jack it settles at 26 ftg.

[Oh Damn, it's Sam]

You have sleeve-style bags in the rear, correct? You should be able to see the full lower lobe / piston if the bag is inflated all the way. But, a picture never hurts either.

EDIT: The bags shown in the B5 kit on Air Lift's website look like they're fully-extended. If that's what your bags look like at ride height, they're all the way up.

[clumsy me]

Is the bag fully extended at maximum pressure?

Its hard to tell, this is my first time with bags. I can take a pic and post if you can tell that way

[Oh Damn, it's Sam]

Is the bag fully extended at maximum pressure?

[clumsy me]

I just finished installing an airlift kit with accuair switchspeed. I am having an issue similar to the other guy with the E90. My problem is I cant get the rears to get high enough. They move up and down with air pressure but they are too low for driving even at full pressure. I have the threads on the shock topped out and I still cant get the tire to clear the fender. The fronts work great but I cant the rear up.

I am planning to call airlift in the morning and see whats up but I figured I would also ask here to see if anyone has any insight.