UAS over BC Racing Coilovers

I've read a few in the past about different setups people are running and it seems as if bags over coils seem to be the favor and overall flexibility. I have an 04 lexus ls430 and it dawn on me on a few different matters and brought up some questions if I can get some experts to answer for me....

My installation is being formed in a few days...and I was wanting to know:
1. What settings should I have them tune my dampering to? (32 adjustables I believe they are set to max out the box?)
2. I am planning on riding low in general even though I am on air
3. I daily my car


Any help I would greatly appreciate it!! btw they are UAS over BC Racing

The ride height will determine the damper setting. so set your ride height/spring rate, drive around & see what feels best to you. when i had my 430 i stared at 10 & worked my way up anything under 10 was too soft imo.. good luck.

the purpose of damping is to disappate the energy created by the compression/rebound of the spring (or air spring in this case), not to act as suspension. i've been setting everything at minimum damping for a while now, for comfort's sake.

While on this topic, figure I'd ask something that was going through my head, when I get the LS400, also planning on doing bags over coils, and most likely going with BC, do you guys go with stock valving or request anything different?

i tend to go with +2k for every -20mm. length dpends on application. i very rarely order stock setups.

Thanks OG, guess I need to do some thinking about what my ride height will be.

[QUOTE=OG;476112]the purpose of damping is to disappate the energy created by the compression/rebound of the spring (or air spring in this case), not to act as suspension. i've been setting everything at minimum damping for a while now, for comfort's sake.[/QUOTE]
thanks !! when I had my TL it was set minimal ..I preferred it overall considering i like to ride pretty low in general..think that's probably what I'll end up doing.

[QUOTE=OG;476115]i tend to go with +2k for every -20mm. length dpends on application. i very rarely order stock setups.[/QUOTE]

Wouldn't +2k only matter with springs? Would -20mm length reduction still be fine while running on bag? Does it work as if i ran more air pressure or something?

you are correct, the valving is matched to the spring rate. i wasn't paying attention. however, even when ordering coilovers that will be used with bags i use the same formula.

that's one of the things about bags, the variable psi makes it impossible to have correct valving at all heights. it's also hard to say what valving is right at what psi because they (psi & spring rate) are 2 different type of measurrment. there is no conversion.

I have a question for you experts out there. Ive got a set of JIC's with blown shocks. Could I mod them for bags and still have a decent ride quality? Im trying to find a way to use them so I don't have to throw them out.

[QUOTE=why33black;495166]I have a question for you experts out there. Ive got a set of JIC's with blown shocks. Could I mod them for bags and still have a decent ride quality? Im trying to find a way to use them so I don't have to throw them out.[/QUOTE]

You want to put bags over blown struts? Thats not a bright idea with anything. Get them rebuilt then add UAS.

[QUOTE=Mr.Doback;495189]You want to put bags over blown struts? Thats not a bright idea with anything. Get them rebuilt then add UAS.[/QUOTE]  I would but I don't know where I can get them rebuilt. I should probably scrap them, thanks for your reply

[QUOTE=why33black;495207]I would but I don't know where I can get them rebuilt. I should probably scrap them, thanks for your reply[/QUOTE]

Check yaj (yahoo auction japan) for the shocks and upgarage may have luck there.

Sent from my PC36100 using Tapatalk 2

ship 'em to feal suspension in ontario, ca. they can rebuild them for you

[QUOTE=Speed;495208]Check yaj (yahoo auction japan) for the shocks and upgarage may have luck there.

Sent from my PC36100 using Tapatalk 2[/QUOTE]
yeah thanks.......WTF you sold me blown coilovers but thanks for those Mark Twain words of wisdom.

[QUOTE=why33black;495251]yeah thanks.......WTF you sold me blown coilovers but thanks for those Mark Twain words of wisdom.[/QUOTE]

Welcome, I was helping my homie sell coils , don't be blaming me all I did was help him that's it . 

Sent from my PC36100 using Tapatalk 2

Question, is there a preferred spring length the coilovers should be built for to get maximum drop? The reason I ask is because someone with a 6.5gen Maxima (OG may be familiar with this) put UAS bags on his -20mm BC coils, which would put the front spring length at about 6", and it seems his front can barely tuck tire if at all. If I went with air I'd be pretty upset if I was lower static. I'm not sure if it has to do with the minimum height of the bag and brackets or something else. Does the spring length make any difference in the amount of drop you can achieve at full low? If it does, would the normal BC coils with a 7" spring get lower than the -20mm extreme drops? I still have my normal ones, and if I go air I'm trying to see if I can just put UAS bags on these or if I should look into other options like Airrex, KSport, etc. Also, if the length does matter, what are the pros and cons of shorter and longer lengths?

it works like this

The UAS bags have an internal stop at 4"
They are extended at 9"

that gives you a theoretical free weight travel of 5"

Now this number is given you have 5 inches of suspension travel (doubt you do)
then add any preload given to the bag for driving style
then add weight on the corner that comrpesses the bag also

so really, you have 3-4 inches of travel
[url=http://www.flickr.com/photos/yokotas13/2094616199/][img]http://farm3.staticflickr.com/2224/2094616199_0bfc0f39fa_z.jpg[/img][/url]
[url=http://www.flickr.com/photos/yokotas13/2094616199/]IMG_9669[/url] by [url=http://www.flickr.com/people/yokotas13/]Flsimages[/url], on Flickr

[QUOTE=FLSImages;497263]it works like this

The UAS bags have an internal stop at 4"
They are extended at 9"

that gives you a theoretical free weight travel of 5"

Now this number is given you have 5 inches of suspension travel (doubt you do)
then add any preload given to the bag for driving style
then add weight on the corner that comrpesses the bag also

so really, you have 3-4 inches of travel
[url=http://www.flickr.com/photos/yokotas13/2094616199/][img]http://farm3.staticflickr.com/2224/2094616199_0bfc0f39fa_z.jpg[/img][/url]
[url=http://www.flickr.com/photos/yokotas13/2094616199/]IMG_9669[/url] by [url=http://www.flickr.com/people/yokotas13/]Flsimages[/url], on Flickr[/QUOTE]


you are a cool guy after all - good info grant

[QUOTE=FLSImages;497263]it works like this

The UAS bags have an internal stop at 4"
They are extended at 9"

that gives you a theoretical free weight travel of 5"

Now this number is given you have 5 inches of suspension travel (doubt you do)
then add any preload given to the bag for driving style
then add weight on the corner that comrpesses the bag also

so really, you have 3-4 inches of travel
[URL="http://farm3.staticflickr.com/2224/2094616199_0bfc0f39fa_z.jpg"][IMG]http://farm3.staticflickr.com/2224/2094616199_0bfc0f39fa_z.jpg[/IMG][/URL]
[URL="http://www.flickr.com/photos/yokotas13/2094616199/"]IMG_9669[/URL] by [URL="http://www.flickr.com/people/yokotas13/"]Flsimages[/URL], on Flickr[/QUOTE]

to add to this, your theoretical 5" is dependant on the stroke of your damper. the coilover must be set up so that the 4" bumpstop bottoms out at the same time as, or preferably a little before, the damper. this is why I don't recommend shortened dampers for uas setups. most of the time you only take away from the lift range, the overall length remains the same at compression.

Really depends wheel offest and widths.  You can go with the shortest damper. but than remember how much wider the UAS bags are and when you set up the bag over coils you cant just make the struts as short as it can go, you have to check the clearance from the tires to the bags. AS you know the Coils over the coil overs are way more narrow so you can prob get more wheel clearnce 


[QUOTE=joecurr;497130]Question, is there a preferred spring length the coilovers should be built for to get maximum drop? The reason I ask is because someone with a 6.5gen Maxima (OG may be familiar with this) put UAS bags on his -20mm BC coils, which would put the front spring length at about 6", and it seems his front can barely tuck tire if at all. If I went with air I'd be pretty upset if I was lower static. I'm not sure if it has to do with the minimum height of the bag and brackets or something else. Does the spring length make any difference in the amount of drop you can achieve at full low? If it does, would the normal BC coils with a 7" spring get lower than the -20mm extreme drops? I still have my normal ones, and if I go air I'm trying to see if I can just put UAS bags on these or if I should look into other options like Airrex, KSport, etc. Also, if the length does matter, what are the pros and cons of shorter and longer lengths?[/QUOTE]

[QUOTE=OG;497506]to add to this, your theoretical 5" is dependant on the stroke of your damper. the coilover must be set up so that the 4" bumpstop bottoms out at the same time as, or preferably a little before, the damper. this is why I don't recommend shortened dampers for uas setups. most of the time you only take away from the lift range, the overall length remains the same at compression.[/QUOTE]
Most Luxury car coils have plenty of travel, and since this was coilover centric i figured it was a given.  but a good thing to add

[QUOTE=eight08customs;497522]Really depends wheel offest and widths.   You can go with the shortest damper. but than remember how much wider  the UAS bags are and when you set up the bag over coils you cant just  make the struts as short as it can go, you have to check the clearance  from the tires to the bags. AS you know the Coils over the coil overs  are way more narrow so you can prob get more wheel clearnce[/QUOTE]

As of right now I'm just trying to figure out the difference in amount of travel and how to prevent not being able to get low enough. But yes wheel clearance will be taken into consideration. My front wheels are narrow so it probably wouldn't be a problem.

[QUOTE=FLSImages;497263]it works like this

The UAS bags have an internal stop at 4"
They are extended at 9"

that gives you a theoretical free weight travel of 5"

Now this number is given you have 5 inches of suspension travel (doubt you do)
then add any preload given to the bag for driving style
then add weight on the corner that comrpesses the bag also

so really, you have 3-4 inches of travel
[/QUOTE]

[QUOTE=OG;497506]to add to this, your theoretical 5" is dependant on the stroke of your damper. the coilover must be set up so that the 4" bumpstop bottoms out at the same time as, or preferably a little before, the damper. this is why I don't recommend shortened dampers for uas setups. most of the time you only take away from the lift range, the overall length remains the same at compression.[/QUOTE]

Thanks for the replies. Okay so 3-4" of bag travel would be assuming 5" of damper travel. Is it safe to assume you have a maximum travel of either the bag travel or damper travel, whichever is lower? And considering that the overall length remains the same at compression, going back to my original questions, is it the -20mm that is preventing him from getting low enough? The minimum length of the bag itself is 4", if the spring it's replacing is 160mm (~6.3") and he is lower with the springs then I guess the bag brackets must total more than 2.3" in length? That's what I'm thinking and why I'm wondering if the same setup would go lower on dampers that are 20mm longer than his. In terms of spring length, assuming the dampers are the appropriate length, you would want a length at least 5" (4" minimum bag length plus some air to roll on) PLUS the total length of the brackets. Now that I think of it, my BC's might not let me get low enough aired out either, unless I can source some thinner brackets.

[QUOTE=FLSImages;497663]Most Luxury car coils have plenty of travel, and since this was coilover centric i figured it was a given.  but a good thing to add[/QUOTE]

Looking at BC's application list, it looks like most Lexus and Infiniti's have 2-220mm fronts. Mine are 180, so with 4" + brackets there isn't much room for more drop.

[QUOTE=joecurr;497688]As of right now I'm just trying to figure out the difference in amount of travel and how to prevent not being able to get low enough. But yes wheel clearance will be taken into consideration. My front wheels are narrow so it probably wouldn't be a problem.





Thanks for the replies. Okay so 3-4" of bag travel would be assuming 5" of damper travel. Is it safe to assume you have a maximum travel of either the bag travel or damper travel, whichever is lower? And considering that the overall length remains the same at compression, going back to my original questions, is it the -20mm that is preventing him from getting low enough? The minimum length of the bag itself is 4", if the spring it's replacing is 160mm (~6.3") and he is lower with the springs then I guess the bag brackets must total more than 2.3" in length? That's what I'm thinking and why I'm wondering if the same setup would go lower on dampers that are 20mm longer than his. In terms of spring length, assuming the dampers are the appropriate length, you would want a length at least 5" (4" minimum bag length plus some air to roll on) PLUS the total length of the brackets. Now that I think of it, my BC's might not let me get low enough aired out either, unless I can source some thinner brackets.



Looking at BC's application list, it looks like most Lexus and Infiniti's have 2-220mm fronts. Mine are 180, so with 4" + brackets there isn't much room for more drop.[/QUOTE]

sometimes you gotta be inventive

i had to cut the lower shock body on the stepwgn to get the lower bag bracket low enough. 
[URL="http://farm5.staticflickr.com/4043/4480981449_856f11598c_z.jpg"][IMG]http://farm5.staticflickr.com/4043/4480981449_856f11598c_z.jpg[/IMG][/URL]
[URL="http://www.flickr.com/photos/yokotas13/4480981449/"]IMG_8941[/URL] by [URL="http://www.flickr.com/people/yokotas13/"]Flsimages[/URL], on Flickr
[URL="http://farm3.staticflickr.com/2718/4480982995_732241e14e_z.jpg"][IMG]http://farm3.staticflickr.com/2718/4480982995_732241e14e_z.jpg[/IMG][/URL]
[URL="http://www.flickr.com/photos/yokotas13/4480982995/"]IMG_8946[/URL] by [URL="http://www.flickr.com/people/yokotas13/"]Flsimages[/URL], on Flickr

[URL="http://farm3.staticflickr.com/2786/4191982471_7106bc9903_z.jpg"][IMG]http://farm3.staticflickr.com/2786/4191982471_7106bc9903_z.jpg[/IMG][/URL]
[URL="http://www.flickr.com/photos/yokotas13/4191982471/"]_97T0142[/URL] by [URL="http://www.flickr.com/people/yokotas13/"]Flsimages[/URL], on Flickr
before mod (19s and 18s had same outside diameter for reference)
[URL="http://farm5.staticflickr.com/4042/4480984287_8c2a260e80_z.jpg"][IMG]http://farm5.staticflickr.com/4042/4480984287_8c2a260e80_z.jpg[/IMG][/URL]
[URL="http://www.flickr.com/photos/yokotas13/4480984287/"]IMG_8951[/URL] by [URL="http://www.flickr.com/people/yokotas13/"]Flsimages[/URL], on Flickr
after



there is always a way my friends. always