iamnaeem

I've been looking more into suspension setups for my LC so I thought I'd share what I've come across.

iamnaeem

See attached files for the full list with images

iamnaeem

Lowering Springs

RS-R Ti2000 Down Sus

Approximate Drop

Front: -20mm to -25mm (-0.8in to -1.0in)

Rear: -35mm to -40mm (-1.4in to -1.6in)

Spring Rate

Front: 6.42kg/mm

Rear: 4.07kg/mm
https://www.rs-r.com/product/lexus-l...s-springs-2018

Tein S.Tech Lowering Springs

Approximate Drop

Front: -1.2in

Rear: -1in

Spring Rate

Front: 5.4kg/mm

Rear: 2.6kg/mm
My car pictured above

https://www.tein.com/srch/us_search....B&item=default

Passive Coilovers

RS-R Best-i Coilovers

Preset Approximate Height From RS-R

Front: -20 to -25mm

Rear: -20 to -25mm

Maximum Adjustment Ranges

Front: 50 to -130mm

Rear: 35 to -135mm

Spring Rates

Front: 10.00kg/mm

Rear: 5.00kg/mm

Factory AVS controller disabled
https://www.rs-r.co.jp/script/itemse...0&URZ100&shock

https://www.topendmotorsports.com/le...overs-3039.php

Tom's Racing Coilovers

20-stage adjustment

Rear stepless adjustment

Front: 4341/984

Rear: 2628/708 (12th stage)

Spring rate (N/mm):

Front: 100

Rear: 60

Factory AVS controller disabled
TOM'S Racing Coilover Suspension Kit

https://www.tomsracing.co.jp/sv/prod...43&typeID=2431

T-Demand Pro-Damper Coilovers

These are highly customizable so there are no standard details.
https://www.topendmotorsports.com/le...vers-10438.php

Bold World Absolute DS NEXT Coil-Overs

Not much info on these besides:

32-stage type

Basic spring rate upgrade to 26K is available
Bold World Absolute DS NEXT Coil-Overs

https://www.boldworld.co.jp/products/detail/1143

https://www.topendmotorsports.com/le...overs-3489.php

Ideal Treuva Adjustable Coil-Over Kit

These are also customizable from my understanding so no basic spring rates available.

36 step adjustable
https://ideal-japan.net/coilover/treuva

https://www.topendmotorsports.com/le...r-kit-5577.php

BLITZ Damper ZZ-R Coilovers

32 way adjustable

Spring rate kgf/mm

Front: 10.0

Rear: 5.0

Free spring length mm

Front: 220

Rear: 240

Adjustment range

Front: -80 - 0

Rear: -70 - 0
https://docs.google.com/document/d/1...f=true&sd=true

https://www.blitz.co.jp/wp-content/u.../2018-0039.pdf

https://www.topendmotorsports.com/le...overs-3052.php

Aragosta Type-P Premium Concept Coilovers

Customizable with rubber mounts or pillow mounts.

Spring rate mm/kgf

Front: 250/12

Rear: 250/6

Adjustment range mm

Front: -35 - +20

Rear: -30 - +20
http://www.tpl.co.jp/aragosta/type/

http://www.tpl.co.jp/sys/wp-content/...rago_lexus.pdf

Active Coilovers

RS-R Best-i Active Coilovers

Preset Approximate Height From RS-R

Front: -20 to -25mm

Rear: -20 to -25mm

Maximum Adjustment Ranges

Front: 50 to -130mm

Rear: 35 to -135mm

Spring Rates

Front: 10.00kg/mm

Rear: 5.00kg/mm

Factory AVS controller enabled
https://www.rs-r.com/product/lexus-l...8-besti-active

Tein Coilovers

No info - maybe discontinued or custom order? From the photo it looks like an electronically adjustable coilover
https://www.boostlogic.com/product/l...er-suspension/

BLITZ Damper ZZ-R DSC Plus Coilovers

Same as BLITZ Damper ZZ-R Coilovers + Electronic damping control module

32 way adjustable

Spring rate kgf/mm

Front: 10.0

Rear: 5.0

Free spring length mm

Front: 220

Rear: 240

Adjustment range

Front: -80 - 0

Rear: -70 - 0
http://www.blitz.co.jp/products/susp...cdsc_plus.html

https://www.topendmotorsports.com/le...vers-11980.php

Air Cup Suspension

Bold World Parfume Cup NEXT Coil-Overs with Air Cup Kit x2

32-step damping force adjustment and full-length adjustable vehicle harmonic drive

Air cups adapted to Bold World Absolute DS NEXT coilovers

No spring rate info
https://www.boldworld.co.jp/products/detail/3993

https://www.topendmotorsports.com/le...it-x2-3490.php

Bold World Parfume Cup NEXT Coil-Overs with Air Cup Kit x4

Same as above but with a cup on each coilover
https://www.boldworld.co.jp/products/detail/3993

https://www.topendmotorsports.com/le...it-x4-3491.php

Aragosta Cup

Same as Aragosta Type-P premium coilovers with x2 air cups for front.

Spring rate mm/kgf

Front: 250/12

Rear: 250/6

Adjustment range mm

Front: -35 - +20

Rear: -30 - +20
http://www.tpl.co.jp/aragosta/type/

http://www.tpl.co.jp/sys/wp-content/...rago_lexus.pdf

Roberuta Lift Systems

Options

Front air cup system

Front and rear air cup system

Front electromagnetic lifter system

Front and rear electromagnetic lifter system

Requires aftermarket coilovers (not included) to be modified and adapted to the system
http://www.roberuta.com/domestic

Airbag Suspension

Air Force Air Struts and Air Bags

Aluminium top mount. Kit can be ordered with extras.
http://www.airforce-sus.com/application.htm#LEXUS

Air Runner Air Suspension System

40 dial dampening

Adjustment range mm

Front: -655 - +765

Rear: -660 - +770
https://www.accincjp.com/productjapan/17-lc500/

AirREX Air Bag Suspension Struts

No info
https://www.airrex-global.com/en/a1-...RZ100-18~.html

Bold World Ultima Airbag Suspensions

A few models: NEXT, 2 NEXT, GLITTER, ADVANCE, EXIST

All 32 way damping
https://www.boldworld.co.jp/products...tegory_id=1186

https://www.topendmotorsports.com/le...de/bold-world/

Ideal Air Suspension Struts and Bags

36 way damping
https://ideal-japan.net/airsuspension

https://www.topendmotorsports.com/le...rear-12266.php

T-Demand Pro Dampers with Air Sus

T-Demand dampers adapted to airbags. Highly customizable.
http://www.t-demand.jp/products/prod...ersion_up.html

bitkahuna

iTrader: (20)

wow, tons of info, thanks for sharing.
do you know the factory spring rates?

iamnaeem

Unfortunately I wasn't able to find that anywhere

jamesss711

Good job on the PDF. It seems you and I are alike in over analyzing upgrade options. The good thing is there are usually no surprises, the bad, it drives you crazy trying decide. Did you get some yet?

Meraki Autoworks

iTrader: (8)

Sounds about right!

-Josh

GrandSedanFan

iTrader: (1)

There are several different options from RSR, including Steel vs. Titanium, different specs for Japan and US cars, and additional options for convertibles. It appears that the Japan spec springs lower the front more than the rear, and the US spec springs lower the rear more than the front.

https://www.topendmotorsports.com/le.../springs/rs-r/

USA
RSR Down Ti2000 (USA) - Approximate Drop: Front 20-25mm / Rear 35-40mm. Spring Rates: Front 6.42kg/mm / Rear 4.07kg/mm


Japan
RSR Down - Approximate Drop: Front 15-20mm / Rear 10-15mm; Spring Rates: Front 6.07g/mm / Rear 3.27kg/mm
RSR Down Ti2000 - Approximate Drop: Front 15-20mm / Rear 10-15mm. Spring Rates: Front 6.07kg/mm / Rear 3.27kg/mm
RSR Superdown - Approximate Drop: Front 35-30mm / Rear 30-25mm. Spring Rates: Front 5.92kg/mm / Rear 3.57kg/mm
RSR Superdown Ti2000 - Approximate Drop: Front 35-30mm / Rear 30-25mm. Spring Rates: Front 5.92kg/mm / Rear 3.57kg/mm

iamnaeem

I've been running Tein springs for some time now, but I'm thinking about coilovers/air cups/air bags now, but haven't decided yet.

Thanks for this!

drutyper

One set I did not see on your list is PSI air suspension, this brand is known from FB LC 500 groups. Pricing is about $3k with air management 3P and its a full kit. Just haven't heard much about quality just yet. This is a tremendous list.

The best brands for air suspension that I've heard of for the LC 500 is Air Runer and T Demand

drutyper

I'm in the same boat as you and your research is astounding! Have you gotten any closer to a decision on what you'll be going with? I can find some kits that are $3k w/ 3P airlift management included. But I want the best and the best cost around $5k and that's without air management or installation costs.

iamnaeem

i haven’t decided yet! Ideally, I want active coilovers that are also electronically height adjustable. I’ve heard that air bag systems end up having too much associated maintenance. I plan to reach out to manufacturers soon to see if they can produce what I’m looking for.

drutyper

I've decided to go with converting the OEM strut for the air. One thing I am having a hard time finding is aftermarket suspension parts. Looks like T-Demand is the only one that offer them and they are crazy expensive.

iamnaeem

Universal Air has a conversion kit. https://www.universalair.com/shop/lc...attr=2812,2813

drutyper

Thats the air suspension I just bought. Coming in hopefully by next week. I'm referring to the other parts from T-Demand, specifically these parts -
https://www.topendmotorsports.com/le...ment/t-demand/