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Those air bag/coilover doohickeys?

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Old 08-16-10, 03:38 AM
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Those air bag/coilover doohickeys?

I've noticed quite a few vip cars have this system integrated into their coilovers. When the bags are deflated, they run off the spring/damper and when you need to get over **** like speedbumps or drive daily in **** areas you can press a button and inflate the bags for more ride height.

What about putting this **** on a seven?

http://www.lxforums.com/board/showthread.php?t=218118

I see this but with the bag deflated, you could be dumped and make full use of the spring. Either a short spring or a short bag to compensate.....



I've been thinking about this since i've busted up my aero twice now and i aint raisin my ******* car. Back on stock bumpers until i find a practical solution that doesn't involve adding rim-to-body gap.
Old 08-16-10, 04:01 AM
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D2 DOES make a set for our cars for $3700 but those of us who already have coils, i'm SURE there are cheaper options out there. Not all of us are ballin THAT hard. Show of hands. How many of you are on dg5 or ohlins coilovers? Ok then....
Old 08-16-10, 10:51 AM
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There is a shop in Washington www.umbrellaautodesign.com they make these kits. The owner Ravi is looking to do work on a FD if mine was running i would get it done. also his NSX was on the cover of PAS a little while back
Old 08-16-10, 01:13 PM
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Welcome to the drift section and thanks for the link. I'm curious if anyone is running such a setup. If you wanted to go air jack on your car, you could run a separate manifold and solenoid specifically for it. I'm surprised more people haven't thought of it or posted about it on this forum, zilvia, ziptied, vrt....etc.....

If i have to, i might look into double o ringing some machined plates in a tight tollerance cup made out of t6 or 7000 series AL and buying an fbss air compressor.

I did find one kit that fits various coilovers for $3,100 for full front and back kit. If we could archive the damper rod widths down to the hundreth thousanth for coils, technically any copetent machinist could make such a kit. Although i'm not sure if the price would be "cheaper than" what's already out there. Those of you pbm/stance guys, idk about. The "i'm a poor, cheap ******" in me says "just get bags and chop springs down half way and deal with potentially **** ride quality....." However, 90 percent of your typical forum ******* will call me a retard and say "save money and quit being gay". I'm sure there's people out there that DO drift on bags or some kind of ghetto as **** setup because they couldn't afford a cup kit. I can always talk to my machinist though. He's a fellow seven owner.

http://www.autofashionstore.com/vrhsucki.html

Same system, different manufacturer perhaps?

The d2 system is 600 more and comes with coilovers.





Pretty much, that's what i see it looking like. A double o-ringed load-bearing flange inside a thick cnc'd cup

I'm going to blow my wheel budget to **** for next year and probably end up on stang reps as yet another set of "i dont care if i screw these up wheels"
Old 08-16-10, 01:19 PM
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I wonder how long they would last with the abuse a drifter puts on them and of the adverse affects of "Slack" in the suspension when the bag is deflated.
Old 08-16-10, 01:46 PM
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something like this ? on top of the coilover spring.

(for the ghetto cheap version)

Isaac
Old 08-16-10, 02:29 PM
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nopistons i can talk to the owner at autofashion for you if you want. I actually see him every now and then at my friends house and know a bunch of the autofashion VIP crew. what kinda questions did you have in mind
Old 08-16-10, 08:23 PM
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I would appreciate it. Ask him if air bags would ALSO be a viable alternative to cups.

I dont plan on KNOCKING any parts off at all. If i did make a set of cups, they'd be a one off set for me only. My buddy who's into mini trucking says he'll sell me his compressor, controller, manifold, solenoids and 1/4" lines for like $450. Which isn't bad.

I was wondering how the cups themselves are constructed. Like i said, i believe they are 1/4" 6000 or 7000 series billet aluminum for the cups and plates and the plates that go inside the cups are double o-ringed to a very tight tolerance. Much like a high psi bicycle pump.

I was also wondering if they would offer the cups by themselves, if so for how much? I think i could stomach dishing out $900-1100 for them.


Digitech: I'm used to not running any preload on my springs as it is. The thing is, i'm worried how the bag would hold up to being fully deflated with the weight of the car from above and the pressure from the spring below on it. Unless there is a spacer of sorts there to eliminate load on the bag UNLESS it's filled with air, i foresee a loud BANG followed by alot of loud "*****". Kicking, screaming, punching myself in the face....whatever else i do when i screw up doing something dumb thinking i'm smart and get angry.

So in a way, i kinda answered my own question. After a good day followed by alot of stress followed by some landshark and hennesy (i know) i'm in creative mode. If you run a spacer between the spring and top mount that allows zero load/compression on the bag at desired static hight, you should be good to go. With my current ONE way adjustable coilovers, this is impossible as i'd run out of travel and **** **** up very quickly BUT i plan on stepping up to three way soon, maybe a used set of jic fla2's, which aren't bad coils and i've had them thrown at me for $400-500. You guys who wont settle than anything less than the latest and greatest, enjoy your dg5's, ohlins, stance..... I'm not on that competitive level YET i know what i want out of my suspension/car.

I like the cups more. Durability. Replacing a 50 cent o ring is cheaper than replacing a $50-100 bag.
Old 08-18-10, 11:37 AM
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I wouldn't do a bag set-up for the fronts, due to the twisting/sheering forces that will be induced to it from the suspension design on a FC
Old 02-05-11, 04:18 AM
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The convo stopped there.

http://www.youtube.com/watch?v=4SjNgVH_HN0


http://www.youtube.com/watch?v=48NRRnIdQAE

Revisited.

I did not write this idea off, ladies and gentlemen. I'm going to try and do something with this idea. I LOVE being low. I just hate not being able to go certain places in my fc because my bumper and skirts sit less than an inch from the ground. I can't afford 19's and **** wheel gap.

My buddy sold his bags, tank, manifold and gear already b/c he lost his job and you know how it is but i'll figure something out!

Haters are going to hate. That's their nature but i'd really like to give this a go. Not like i cant switch back to springs only if the bags dont work out and replacement bags are cheap at $50 a pop.....if and when they tear/wear/pop.

A torrington bearing could help with said twisting forces but even so, the entire spring rotates with the shock body because the rotational point on MOST if not ALL coilovers is the pillow ball. That's what's taking the vertical load. I need to get a damn lathe. I'm sick of not being able to build and rnd my own ****. I want one so bad. Water cooled cutting via washer bottle/pump from a junk car and i'm good to go. Manually checking my work with a dial indicator/digital calipers between turn/bore sessions. I dont think a bag will work well with a spring. Obviously i'm shooting for a piston/bore cup kit.


Does anyone care about this or do you love having a low street car that's somewhat bothersome at times to drive on the street? Especially when you're just going out to chill somewhere and relax? Some input/help on this idea would be very nice. I'm not blowing smoke up anyones ***. I'm also not trying to make any money off of this. I just want a car i can enjoy fully no matter what but on a lo-cost resourceful diy hobbyist budget.

Good, fast, cheap. Pick two. I want good and cheap. I have time. Been messing around with solidworks but it keeps crashing my computer so i'm not getting any progress with it.
Old 02-05-11, 12:38 PM
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Just remember, if you're important enough, people will wait while you find the flattest route into and out of the parking lot.

This stuff works in theory and I've seen it work in application. I first got to thinking about it when I read a magazine article God-knows how long ago of a black FD on bags with a big single and some other go-fast goodies. Really so long as you can get the bag to freely rotate with the assembly OR have the assembly rotate around the bag, you won't have any binding or tearing issues.

I'm a static-drop guy at heart, but I do agree that it'd be nice to go some places and not have to worry about dragging your downpipe or expensive-*** undercarriage braces 12 feet just to get to Carls' Jr.

****, maybe homebrew an upper mount using needle bearings or ball bearings from an industrial caster wheel assembly - you know, like on commercial carts at the airport that haul 10,000lbs of other peoples' **** ... only needs to hold 1200lbs PER PAIR for the average car.

I'm in for some creativity on this one.
Old 02-05-11, 03:05 PM
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Well see dude, the thing i stopped to think about is before i put my coilovers on, i made sure i had a firm understanding of all the working forces on them before install. I remembered last night (i get hammered.....alot) that the pivot point for em is at the upper pillow ball so as long as the upper and lower hats are fixed in the right points, there should not be any tearing issues. AND i got to thinking you'd need some crazy offset to clear the bags themselves.


I can't get any real info on what the bee*r car was running and it kinda pisses me off but at the same time i understand the business side of things so it's all good.

I'm still wanting to machine some air cups. I was in another thread on here talking about squat and slip angle and friction. Air suspension on dampers, even if they are adjustable will never be as good as a real spring so for performance reasons alone, the SPRING would have to do all the work. Not a bag of air. Plenty of vehicles rock air ride from the factory including some of the semi trailers i load at work. They are equipped with air ride. I've loaded 33,000-40,000 pounds on some of those trucks and they take that on 8 tires, and 4(?) bags without bouncing all over the place. I really need an expert opinion on this so i will dig into it further and see if i can't come up with some tech info to back my idea.

it's a huge pain in the *** trying to design and build something that hasn't really been done before or analyzed in detail. We STILL dont have aftermarket lca's for our fcs......or billet trailing arms or even hubs and knuckles similar to what driftworks did with their s/z/r chassis geo master kits. I'm trying to figure out if people are sitting waiting on patents to cash in or dont give a **** enough to create a demand to help our chassis grow. We've got coils, knuckles and some other random suspension bits but still running stock trailing arms, are limited to coilovers and stock lca's due to lack o drive wanting to push what we can do with these rx chassis cars.
Old 02-05-11, 10:39 PM
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What exactly do you think could be improved by using billet LCA's? FC LCA's are among the highest quality OEM pieces. The only thing I'd love to have up front is a ball joint with an extended stud.

Trailing arms I could see, It'd be interesting to see the effects of playing with the camber link length while adjusting the trailing arm to keep static camber in check while adjusting the camber curve.
Old 02-06-11, 12:03 PM
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Originally Posted by Digi7ech
the adverse affects of "Slack" in the suspension when the bag is deflated.
this is the biggest concern for me. whats goin to happen when there's "negative" weight on the suspension? (like when you hit a bump)
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