KidJai06

This is an AWD version adapted from Slartibartfast's RWD thread. I've quoted some of his considerations below as I think they are a valuable. Obviously there are FAR fewer options available for AWD applications, but I did my best to cover as much as I could find. If you have answers to blank areas feel free to message me and I will update (or ADMINs just add it in). I haven't quite zero'd in on how to appropriately estimate front/rear frequency ratio based on spring rates as Slarti has or how spring location (OEM vs. True) affects estimating that since that has (or should) impact rear spring rate.

AWD Coilover Specifications

Brand: BC
Model: BR Series
P/N: V-08-BR
Price: $995 ($1350 w/Swift Springs)
Type: OEM
Body type: Monotube
Upper mount: Pillowball or Rubber
Separate hgt adjust [1]: Yes
Damping type: Linear
Damping adjust (F/R): 30/30
Rate (F/R), kg/mm:10k/8k
Front/rear ratio [2 ]:
Spring diameter, mm[3]:
Rebuildable: Yes
Warranty (yr): 1 year Limited
Note: Springs customizable and upgradable to Swift

Brand: Broadway Static
Model: 500s
P/N:
Price: $1399
Type: OEM Style
Body type: Monotube
Upper mount: Rubber
Separate hgt adjust [1]: Yes
Damping type: Digressive
Damping adjust (F/R): 24/24
Rate (F/R), kg/mm: Custom
Front/rear ratio [2 ]:
Spring diameter, mm[3]:
Rebuildable: Yes
Warranty (yr): 5 year
Note: Custom built off Fortune Auto base. Can upgrade to Swift Springs.

Model: Version II
P/N:
Price: $1999
Type: OEM Style OR True
Body type: Monotube
Upper mount: Pillowball
Separate hgt adjust [1]: Yes
Damping type: Digressive
Damping adjust (F/R): 24/24
Rate (F/R), kg/mm: Custom - Recommended 14k/10k
Front/rear ratio [2 ]:
Spring diameter, mm[3]:
Rebuildable: Yes
Warranty (yr): 5 year
Note: Custom hand built to spec, can add on Swift Springs, Helper Springs, Remote Damper Control & Air Piston Lift.

Brand: D2 Racing
Model: RS Series
P/N: D-IN-10
Price: $975
Type: True
Body type: Monotube
Upper mount: Pillowball
Separate hgt adjust [1]: Yes
Damping type:
Damping adjust (F/R): 36/36
Rate (F/R), kg/mm:
Front/rear ratio [2 ]:
Spring diameter, mm[3]:
Rebuildable:
Warranty (yr): 1 year
Note:

Brand: Feal
Model: 441
P/N: 441NI-15
Price: $1285
Type: True
Body type: Monotube
Upper mount: Pillowball
Separate hgt adjust [1]: Yes
Damping type: Digressive
Damping adjust (F/R): 30/30
Rate (F/R), kg/mm: 12k/5k
Front/rear ratio [2 ]:
Spring diameter, mm[3]:
Rebuildable: Yes
Warranty (yr): 1 year
Note: Feal spring rate not customizable

Model: 441+
P/N: 441NI-15+
Price: $1549
Type: True
Body type: Monotube
Upper mount: Pillowball
Separate hgt adjust [1]: Yes
Damping type: Digressive
Damping adjust (F/R): 30/30
Rate (F/R), kg/mm: customizable Swift springs
Front/rear ratio [2 ]:
Spring diameter, mm[3]:
Rebuildable: Yes
Warranty (yr): 1 year
Note:

Brand: Fortune Auto
Model: 500 Series
P/N: FA500-G37x
Price: $1330 ($1680 Swift Springs)
Type: OEM
Body type: Monotube
Upper mount:
Separate hgt adjust [1]: Yes
Damping type: Digressive
Damping adjust (F/R): 24/24
Rate (F/R), kg/mm: 11k/8k
Front/rear ratio [2 ]:
Spring diameter, mm[3]: 60mm
Rebuildable: Yes
Warranty (yr): 5 year Limited
Note: Upgradable to Swift or Hyperco Springs - Also Canister upgradable to 2-way or 3-way.

Brand: Godspeed
Model: MonoMax
P/N: MMX-3590
Price: $840
Type: OEM
Body type: Monotube
Upper mount: Pillowball
Separate hgt adjust [1]: Yes
Damping type:
Damping adjust (F/R): 40/40
Rate (F/R), kg/mm: 14k/8k
Front/rear ratio [2 ]:
Spring diameter, mm[3]: 62mm
Rebuildable:
Warranty (yr): 1 year
Note:

Brand: KSport
Model: Kontrol Pro
P/N: CIN021-CP
Price: $850
Type: True
Body type: Monotube
Upper mount: Pillowball
Separate hgt adjust [1]: Yes
Damping type:
Damping adjust (F/R): 36/36
Rate (F/R), kg/mm: 16k/8.7k
Front/rear ratio [2 ]:
Spring diameter, mm[3]:
Rebuildable: Yes
Warranty (yr): 1 year
Note:

Brand: Megan Racing
Model: EZ II Series
P/N: MR-CDK-IG09AW-EZII
Price: $750
Type: OEM
Body type: Monotube
Upper mount: Rubber
Separate hgt adjust [1]: Yes
Damping type:
Damping adjust (F/R): 15/15
Rate (F/R), kg/mm: 10k/8k
Front/rear ratio [2 ]:
Spring diameter, mm[3]:
Rebuildable:
Warranty (yr): 1 year
Note:

Brand: Scale
Model: Innovative Series
P/N: IF11-IS
Price: $1245
Type: True
Body type: Monotube
Upper mount: Pillowball
Separate hgt adjust [1]: Yes
Damping type:
Damping adjust (F/R): 12/12
Rate (F/R), kg/mm: 14k/8k
Front/rear ratio [2 ]:
Spring diameter, mm[3]:
Rebuildable: Yes
Warranty (yr): 2 year
Note: Many custom options (e.g. spring rates [$0], spring colors [$165] , stainless components [$45], 2-way external adjusters [$1000], swift springs [$350], pillow ball upper mounts [$100], low [$0] & extreme low [$100], lock ring collar color [$35])

Brand: Silver’s
Model: Neomax
P/N: NN143
Price: $1095
Type: True
Body type: Monotube
Upper mount:
Separate hgt adjust [1]: Yes
Damping type: Linear
Damping adjust (F/R): 24/24
Rate (F/R), kg/mm: 14k/8k
Front/rear ratio [2 ]:
Spring diameter, mm[3]:
Rebuildable:
Warranty (yr): 18 month
Note: Customizable spring rates

Brand: Stance
Model: XR-1
P/N: ST-V35-XR1
Price: $1350
Type: True
Body type: Monotube
Upper mount: Pillowball
Separate hgt adjust [1]: Yes
Damping type: Digressive
Damping adjust (F/R): 16/16
Rate (F/R), kg/mm: 12k/8k
Front/rear ratio [2 ]:
Spring diameter, mm[3]:
Rebuildable: Yes
Warranty (yr): 1 year
Note: Listed for the G35 AWD but seems to be adaptable to our platform.

Brand: TruHart
Model: Street Plus
P/N: TH-1803
Price: ≈$600
Type: True
Body type: Twintube
Upper mount: Solid Aluminum
Separate hgt adjust [1]: Yes
Damping type: Linear
Damping adjust (F/R): Non-Adjustable
Rate (F/R), kg/mm: 16k/8.7k
Front/rear ratio [2 ]:
Spring diameter, mm[3]:
Rebuildable: Yes
Warranty (yr): 2 year
Note: Sister company to D2 - dampening setting modeled after D2’s average settings.

Brand: YellowSpeed
Model: Dynamic ProSport
P/N: YS01-IN-DPS016
Price: $979.00
Type: True
Body type: Twintube
Upper mount: Aluminum w/Hardened Rubber Bushings
Separate hgt adjust [1]: Yes
Damping type: Linear
Damping adjust (F/R): 33-way
Rate (F/R), kg/mm: 12k/7k
Front/rear ratio [2 ]:
Spring diameter, mm[3]:
Rebuildable: Not stated
Warranty (yr): Not stated
Note: Built to order

Baadnewsburr

iTrader: (3)

Thanks for posting this.

Can you post approximate prices too?

also for the stance ones, there may be an issue with the rear dampers being too short if its for the 1st gen g35 and not the 2nd gen.

KidJai06

No problem. I updated it with general prices. Add-ons or customization will obviously add to the overall costs. I'm sure in many cases reaching out to vendors on this site can be more specific and perhaps even provide a better rate.

Yes you're right about the rear dampers being short, here is the link to where this is discussed in another thread: https://www.myg37.com/forums/brakes-...options-9.html

I feel like coilovers were listed for our platform as direct fit when Stance had the SS coilovers but with the update to XR its not exact but still workable as long as one is communicating what is needed from Stance.

slartibartfast

iTrader: (7)

By the by, I used "redux" in my thread title because that thread was my second attempt at the list.

re·dux
rēˈdəks,ˈrēˈdəks
adjective

brought back; revived.

"the 1980s were far more than just the '50s redux"

KidJai06

I am familiar with the term, I wasn't sure of your exact intention of it's use, however found it to fit insomuch as to "bring back" or make a second attempt (albeit not mine) at the AWD coilover thread.

I appreciate the sticky...hopefully it's helpful.

slartibartfast

iTrader: (7)

Fear not, it is helpful. I hadn't realized there had been an earlier attempt at this list.

KidJai06

Updated the list, Godspeed : Scale : Silver's : TruHart

I think that covers about everything for the X, both readily known and obscure.

slartibartfast

iTrader: (7)

Take a look at Broadway Static. They customize Fortune dampers, maybe they will work with the AWD dampers.

KidJai06

I remember perusing their website previously, looked like they put out a pretty nice product. I will shoot them an email to see what they might be able to offer for AWD.

Baadnewsburr

iTrader: (3)

Thanks for the update, I never heard of a number of those options even after readign so many threads on here...for the Truehart ones I found this info:


The TruHart StreetPlus Coilover system is a full monotube design coilover with integrated aluminum top mounts. The StreetPlus coilover is an ideal solution for today's budget-minded tuner looking to lower their vehicle and increase handling performance. The independently adjustable lower mount allows fine tuning of a vehicle's height without sacrificing shock travel, resulting in a sporty yet comfortable ride on the street or strip. These coilovers do not have damper adjustments.

Fitment:
Twin Tube Shock Design
Separate Pre-Load Spring
Adjustable mount for ride height adjustment
Powder Coated shock bodies & Anodized Lock Rings for durability
Top-Hats or Camber Top-Plates included where applicable
Fitment:
Infiniti G37X 06-13

https://www.vividracing.com/truhart-...151801369.html

KidJai06

Yeah much of the same was listed on their website also. Unfortunately they didn't list much of the information I wanted to know (i.e. coilover type, spring rates, amount of adjustment, etc.). It didnt give me a lot of confidence in their product but for sake of being thorough I included it in the list. I did actually send an email to Truhart asking for more info, if they respond I'll update it here.

KidJai06

From Brandon at TruHart (I also updated the initial post to reflect details discussed):

The I803 coilovers convert the rear to a one piece coilover, the picture on our website is the actual coilovers for your vehicle. The top mounts are solid aluminum mounts. All of our streetplus coilovers use linear dampening which is nonadjustable. We used our sister company’s, D2 racing, coilover’s average settings and set up our streetplus dampening to that dampening since most people find a dampening setting they like and then never adjust it again. Streetplus coilovers are only ride height adjustable they do not have dampening adjustiblity. Ride height can be adjusted roughly from 1.25in-3.5in from stock ride height on average for the streetplus line. The coilovers are rebuildable in the sense that we sell all the parts to repair the coilovers, and replacement shocks are $70each. The spring rates for the I803 are 16K front 8.7K rear.

Thanks!

slartibartfast

iTrader: (7)

That's great info. I find the front rates rather steep along with the rate step between the front and rear. An aftermarket rear sway bar will probably be needed to restore a more neutral behavior in turns.

KidJai06

I agree. The front rates in most applications seem a little high to me. I intend to take some measurements and attempt some calculations once I get home from vacation and see if I can come up with a reasonable idea as to what spring rates may be most appropriate (in conjunction with properly setup dampers). I'd like to achieve flat ride with rear frequency being approx. 20-25% higher than the front. I have Hotchkis F&R sway bars, both allow some adjustability. I also still have my OEM bars stored away in the event the need would arise to soften further. I've been intrigued by the idea that bigger/stiffer stabilizer bars may give a stronger feeling of control while actually reducing grip insomuch as it reduces the independence of the suspension.

Baadnewsburr

iTrader: (3)

I wonder if theyre higher bc of the added weight of the tranfer case up front