Forged Performance: JRZ RS1 Coilovers **Review** and Press Release
 

After nearly a year of engineering and track development, we are pleased to announce the release of the long awaited JRZ RS1 Suspension system for the 370Z.

JRZ is one of the top suspension names in professional motorsports with countless podiums in the American LeMans Series, Grand-Am, SCCA, and NASA. Until recently, JRZ suspension was only seen on big budget pro race teams. Over the past 3 years, Forged has worked with JRZ to develop suspension systems that were better suited for dual purpose track and street use without compromising the race grade construction and materials of shocks. Every GT-R and 370Z that sees track use at Forged runs JRZ shocks in addition to our record setting Porsche GT3.

As many of you know, over the past year I've been testing and running the JRZ RS1 on my daily driven Nismo 370Z. Without question, the RS1 is the highest performing off the shelf coil over I've used to date. The RS1 is a high gas pressure single adjustable mono tube damper with the canister designed inside the damper. The RS1 is built on the same production line and sharing components with their pro racing applications. Following the JRZ design philosophy, the RS1 coil over for the 370Z utilizes a large 16mm diameter piston rod which magnifies the high pressure gas charge which means greater chassis control without using a high spring rate or increasing harshness. Utilizing a mono tube design with high flow piston ensures the smoothest possible ride in normal conditions while the 21 position bleed adjustment gives the ability to tune for race or track day conditions.

What makes a coil over system truly exceptional is it's ability to control the oscillation of the spring which is important not only for ride comfort but for keeping the tire in contact with the road surface under all conditions. Many of the lesser quality systems out there run fairly stiff springs but with very poor damping characteristics which results in a bouncy or numb driving experience. The RS1 even with a fairly firm spring has a very well damped and compliant ride. The level of confidence that the system inspires both on the street, and on the track is outstanding. During my track testing at Road Atlanta, the chassis felt very stable, superb under braking, and almost no body roll in the corners.

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Key Features:

* Complete kit with solid machined top plates, main and helper springs, and hardware
* Full Coilover Front and Rear (no more inboard rear spring)
* Linear Rate main and helper springs: 6 X 2.25 650lb Front 8 X 2.25 500lb
* 21 positions of combined adjustment
* Large 16mm piston rod
* Adjustable nitrogen gas charge
* Piston designed for silent operation
* Large range of adjustment
* $4080 Complete 370Z Kit

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We have 4 kits in stock ready for installation or shipping. In addition installation, we offer corner balancing, street and track oriented alignment, and many other track services. Let me, Decker, or Ryan know if you have any questions. Thanks and Happy New Year to all!

Sharif

:yum:

Dammit Sharif! :p

well done!

clearance for bigger tires?

are you offering parts to get rid of the spring perch and drop some weight?

Wow pricey but sounds awesome!!!

+1

Hi Travis, hope you are doing well! :) The shocks will not interfere with wider wheels and tires.

We have a line of suspension parts in development right now, but we ran this on our 370Z race car, and many other track oriented cars. In addition to some weight savings the bonus is a huge range of toe adjustment and monoball fittings. http://www.forgedperformance.com/sto...at=1935&page=1

Awesome, a set of $4000 coilovers! lol

I'll be sure to put these on the list of things I'll never be able to afford. :bowrofl:

Thx for the reply Sharif. I may look to upgrade the BC coilovers later this year...

Seems like an ideal setup for a dual use car. KWv3's on steroids!

:tup: :tup: :tup:

Are they rebuildable and can you change the valve shim stacks and the piston? Are they digressive? Are the springs linear rate? I used to have Penske shocks on my bikes and rebuilt forks too with race tech stuff. I'm a suspension fanboy....my weakness.

They are rebuildable and the valving can be changed if needed, but we don't recommend changing the valving. They are digressive on the compression and linear on the rebound. The springs are linear rate. Let us know if you have any other questions. :tiphat:

Does the adjuster change the compression or rebound? Or is it a quasi system that affects both compression and rebound? A shock dyno plot would be good to see, but that may be proprietary so I can understand if you don't show one.

+1 on dyno plot. Would like to see that with the mono adjustments through the range, if at all willing/possible

The adjuster changes both rebound and compression simultaneously. They are valved where the rebound increases and decreases at a slightly greater rate than compression as adjustments are made. It's well thought out and engineered.

Sounds GREAT...
 

But $4,000 ???? Based on your driving experience can you elaborate on how this system is $3,000 better than most setups? It would have to corner like an F1 car and cruise like a Maybach for me to even consider spending that kind of cash.