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Thread: BMW e23, e24, e28 DIY Air Suspension Solutions

  1. #26

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    nah, about the same diameter. the issue is the UAS bag didnt collapse as much as I needed at the desired position. Airlift's bag is 3" collapsed, including the mount length.

  2. #27
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    Quote Originally Posted by NegativeCamber View Post
    nah, about the same diameter. the issue is the UAS bag didnt collapse as much as I needed at the desired position. Airlift's bag is 3" collapsed, including the mount length.
    ahhh, i see.

    3 " collapsed is awesome, cant wait to see where you take it man

  3. #28

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    i texted you when it was first dumped, but you never responded. im guessing it never went through.

  4. #29
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    Quote Originally Posted by NegativeCamber View Post
    i texted you when it was first dumped, but you never responded. im guessing it never went through.
    i didn't receive it to my knowledge, text that shit again!

  5. #30

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    someone has been looking through your phone and deleting texts! jk. a couple of pics are now in the build thread. i'll keep you updated on the latest dude.

  6. #31
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    More!

    - www.bagriders.com - Email us at: sales@bagriders.com -

    - Did you find a lower price? We Price Match! -

  7. #32

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    do the koni g60 inserts fit the e28?
    and lets see some pics

  8. #33

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    Quote Originally Posted by Rali@BagRiders View Post
    More!
    working on it!

    Quote Originally Posted by pfcrayb View Post
    do the koni g60 inserts fit the e28?
    and lets see some pics
    the g60 body is 44mm in diameter. if e28s use inserts that are the same size or a bit less, then you can use them.
    Quote Originally Posted by Kielan View Post
    I've had a lot more fun in my Dad's Prius than I care to admit.




    BMW e23 build Thread

  9. #34
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    This idea would also work on the E30 as its also MacPherson struts, but the rear setup is different. I have a pair of complete, brand new air front struts and am looking here at how to attach the bottom assembly of the OEM BMW strut to the bottom of my air strut.Thanks for the photo of that in your thread.
    What I need to know now is how did you calc what you wanted your final ride heights to be?
    I figure the normal air pressure in the bags for normal driving would be similar to the poundage of a normal OEM BMW front spring - give or take - say 180lbs. Then I need to inflate my bag to this poundage on the garage floor so I can compare the strut length to the OEM BMW strut and work out my desired height. Mine's a daily driver so I need to be practical. 4 inches of clearance under the car was always considered MINIMUM clearance on lowered cars for practical daily drivers.
    I've been lowering cars since the seventies but this is the first time with air.
    Loving your car though, can I see a picture with the suspension pumped up to maximum?

  10. #35

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    NegativeCamber,

    Do you own a shop I could take my car to for us local Bay Area peeps? How much did you spend on parts? How much would you charge for install? Please send me a PM if you don't want to post a price.

    D

  11. #36

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    I dont own a shop or have any affiliation with any that could do the install, so I am not sure of a good place to go in the bay. A driveway is where I do all my work. Sorry, I am not doing any sidework for anyone at the moment. Contact Rali @ bagriders to get a quote on the universal air suspension struts. I got these a while back before there was a small price increase in the airlift products.
    Honestly, you can do this yourself by measuring your desired maximum drop and working backwards to measure the needed stroke length of the strut. Measure for clearance, then prefab the brackets and bring them to any competent welder, if you cant weld.
    Quote Originally Posted by Kielan View Post
    I've had a lot more fun in my Dad's Prius than I care to admit.




    BMW e23 build Thread

  12. #37
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    Quote Originally Posted by NegativeCamber View Post
    car looks great man. were you able to lay out with your design?
    Sorry for responding so late. My control arms are bottoming out on the pavement when I air out, so yes.
    IG:uvebeenrobd
    --------------------------------------------------------------------

  13. #38
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    Mar 2011
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    so how much did everything cost including the tank, compressors, bags, etc, basically everything??

  14. #39

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    Quote Originally Posted by Mike E30 UNT View Post
    This idea would also work on the E30 as its also MacPherson struts, but the rear setup is different. I have a pair of complete, brand new air front struts and am looking here at how to attach the bottom assembly of the OEM BMW strut to the bottom of my air strut.Thanks for the photo of that in your thread.
    What I need to know now is how did you calc what you wanted your final ride heights to be?
    I figure the normal air pressure in the bags for normal driving would be similar to the poundage of a normal OEM BMW front spring - give or take - say 180lbs. Then I need to inflate my bag to this poundage on the garage floor so I can compare the strut length to the OEM BMW strut and work out my desired height. Mine's a daily driver so I need to be practical. 4 inches of clearance under the car was always considered MINIMUM clearance on lowered cars for practical daily drivers.
    I've been lowering cars since the seventies but this is the first time with air.
    Loving your car though, can I see a picture with the suspension pumped up to maximum?
    sorry, i missed this. my final ride height would be whatever came about from the length needed to lay the front out. the strut bags have a good amount of stroke, so i wasn't worried too much about where the ride height would be.
    granted, this method is not for "proper" air suspension installs, as they suggest to leave clearance under the car when fully aired out...but we know there is no fun in that.

    the issue with inflating the bags off the car is that they will not be the same length as they would be with the weight of the car on them. 30psi off the car will probably have them fully extended, while 30psi with the weight of the car may have them half compressed. the manufacturer of your bags should tell you what the length of the bag should be at ride height...more or less the mid stroke range.

    in your case, you will want to measure the length of the strut assembly (coil spring) with the weight of the car on them. if you design your strut bag to be that length at midstroke, thats how high the car will sit, at whatever pressure it takes to get there. subtract the length of the strut bag fully collapsed and thats how much lower the car will be when aired out.

    hope that makes sense and helps you get started...
    Quote Originally Posted by Kielan View Post
    I've had a lot more fun in my Dad's Prius than I care to admit.




    BMW e23 build Thread

  15. #40

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    Quote Originally Posted by righteousrags88 View Post
    so how much did everything cost including the tank, compressors, bags, etc, basically everything??
    a bit over 1100 for the Airlift strut bags, and i went with the autopilot V1 air management kit from BagRiders. i dont remember the exact price but right now the V2 is 1150.

    if you dont want to spend that much on management, you can get the manual kit. so to bag the car with everything you need is around 1700 with the manual kit. a good set of coilovers is near that, so its not far off.
    Quote Originally Posted by Kielan View Post
    I've had a lot more fun in my Dad's Prius than I care to admit.




    BMW e23 build Thread

  16. #41
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    Dec 2011
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    Very cool build!

  17. #42

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    This thread makes everything look really easy. Great work! Do you have any idea if the suspension on these BMWs are the same as a W126?

  18. #43
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    Quote Originally Posted by NegativeCamber View Post
    a bit over 1100 for the Airlift strut bags, and i went with the autopilot V1 air management kit from BagRiders. i dont remember the exact price but right now the V2 is 1150.

    if you dont want to spend that much on management, you can get the manual kit. so to bag the car with everything you need is around 1700 with the manual kit. a good set of coilovers is near that, so its not far off.
    Yup I went the manual route.
    Should be on the ground soon
    <3
    I dislike Byron.

  19. #44
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    Quote Originally Posted by Clark View Post
    This thread makes everything look really easy. Great work! Do you have any idea if the suspension on these BMWs are the same as a W126?

    Its not the same!

    Read this thread, and youll see that the front suspension on w126 is gay, but doable
    http://forums.vwvortex.com/showthread.php?4863646-W126
    teamdb

  20. #45
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    wow you make it look so easy, thinking about doing this to my 323 e21. just need to work out the basics and go from there. thanks for all this info.

  21. #46
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    Does anyone know if E28 and E23 struts are the same? I need to produce some coilovers for my E28 here in the UK, and knowing exactly what strut inserts are much shorter, but the right diameter would be a huge bonus!

  22. #47

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    Quote Originally Posted by papercutout View Post
    Does anyone know if E28 and E23 struts are the same? I need to produce some coilovers for my E28 here in the UK, and knowing exactly what strut inserts are much shorter, but the right diameter would be a huge bonus!
    they arent. e23 inserts are 44mm and the e28 are 36mm. any shorter koni or bilstein insert will work. take a look at their catalogs for the dimensions. you will just need it re-valved for the e28.
    Last edited by NegativeCamber; 03-21-2012 at 03:47 PM.
    Quote Originally Posted by Kielan View Post
    I've had a lot more fun in my Dad's Prius than I care to admit.




    BMW e23 build Thread

  23. #48
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    36mm? Really? Wow, didn't expect them to be that skinny - the OD of the strut leg is 52mm! Thanks though.

  24. #49

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    Quote Originally Posted by papercutout View Post
    36mm? Really? Wow, didn't expect them to be that skinny - the OD of the strut leg is 52mm! Thanks though.
    That is what the catalog says. I measured my insert with a caliper and it was 44mm just as stated in catalog, so I'm sure its the same deal with the e28.
    Quote Originally Posted by Kielan View Post
    I've had a lot more fun in my Dad's Prius than I care to admit.




    BMW e23 build Thread

  25. #50
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    Sorry if my questions are a bit nieve very new to this air suspension thing.

    What are the benifits of the shorter shocks? are they only needed if you shorten your housing? looks like they are also only needed with the UAS bags not the airlift is that correct?

    Looks like the UAS bags are around 400 a pair while the airlift are around 900 a pair. For this reason I'm more inclined to go with the UAS bags. That said I want to be sure I understood correctly. The UAS bags did clear the tires where you welded and mounted them but was not giving the desired drop. To achive that drop you would need to weld them lower and no longer clear your tires with out huge spacers. Is that correct?

    Would it be possible to use the UAS bags in the rear? Are there any other options besides the airlift sleeve bags?

    Working with a e12 based e24 - 82 633csi BMW

    Thank you in advance. All sugestions welcome.

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