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.

Those two goals don't really go hand in hand. (Which I'm syre you're obviously aware of.)

If i had the money i would get some JRZ coilovers, but i would get the 2 or 3 way adjustable coilovers and have them revalved a little.

in for an independant review..

One thing I love about my current setup is my spring rates. 13K F and 5K R (5K being true type setup like the JRZ's). When I had my last alignment they put me in car and the settings didn't even change. And I weigh 210.

I have ridden in a couple of cars with JRZ's and they are awesome. Are they worth it? Damn close IMO. These are not for the average guy. But if you are hard core track guy and have more disposable income. Get them. I was about to this year but I really want to put more money into safety and track days.

Urvokbm, thank you for the question. The JRZ's are definitely geared towards the individual that does a dozen or more track days each year, but still daily drives the car on the street. JRZ used to only build dampers for professional motorsports applications and even today, all JRZ shocks are still manufactured in a small workshop in the Netherlands where each unit is built and assembled by hand. If you compare the top motorsport brands of dampers you will find that JRZ are priced very competitively.

Unlike a number of the entry level brands, our setup is designed 100% complete with aluminum CNC machined top hats front and rear, and a full true coilover for the rear, rather than an inboard spring with spindle mounted shock. We also include motorsport main springs and helper springs witih divider plates. We purchase the springs separately and the 8 springs (4 main 4 helper) we use are $750 alone. The full coilover setup gives much better spring control and is in direct connection to the spindle.

For those that are looking to lower their car and mostly driving on the street, the JRZ might arguably be overkill. But it's the best shock out there, hands down and I've tried almost every brand out there. The differences between the JRZ's and others is immediately apparent even on street driven car.

With respect to the number of adjustments and number of clicks, the marketing trend these days is more is better. But in the real world, I would prefer 5 clicks and 1 adjustment knob that work REALLY well, vs. 32 clicks, and 4 knobs that don't really make as much of a difference. At the end of the day, the proof is always in the laptime, and with the JRZ's we go faster and faster than all others.

I will see if Bryan@JRZ can chime in with some additional comments. One great things about owning JRZ shocks is the direct access the owners get to JRZ's top engineering staff in the USA. I can't tell you how many times I've called Bryan at 7:00am on a Sunday while on track and he gladly assists with setup and technical questions so we can maximize the performance from our setup.

Thank you ,

SA

I think you have to be serious enthusiast to appreciate quality and performance of JRZ coil overs. If you don't appreciate the difference between high quality motorsports damper and lower quality production damper it's not going to be good investment for you.

I spent $5000 on JRZ Clubsport setup and it was by far the best modification on my 370z. The range of dampening is incredible and unlike some dampers where its hard to tell if you are gettin any increase or decrease in dampening, compression, etc The JRZs make tuning your car easy! Too much dive at the track? Put more bump up front and nose stays planted. I can essentially tune the car with the shocks in ways no other cheap damper would allow.

Crazy thing is these dampers are so good that I get away with running 1000 lbs springs upfront on the street. The car rides smooth and controlled. On freeway ruts etc the car doesn't go airborne either. I can literally hear the dampers obsorbing shock and then pushing tires back to the ground.

This looks like excellent entry level JRZ package for our cars! Anyone who is true enthusiast can't go wrong with this package. Thanks to guys at Forged for offering this setup!

Just have a couple sets in stock, and are offering a special price for local/walk in customers. Free corner balancing and alignment!. It's not too late to get your 370Z setup for the upcoming summer driving season. :) It doesn't get any better than this.

Top out springs are nice to keep things settled over bumps. Which Grand Am teams run these? I was just at the latest race.

Most of the TRG prepped Cup Cars. JRZ, Moton, are the two most popular brands in Grand-Am Rolex GT Racing.

I'm really tempted... called and priced a set a while back but I may go with a local shop who works with HSD coilovers.

Can you convince me? How about a ZdayZ pickup special? :P

Any downside to relocating the rear springs? Are the rear towers up to the task over the long haul?

PM sent

No issues at all.

We've just received another shipment of JRZs, order yours while they're in stock!!!

How do they compare to the Motons?

After several track days with these I have to say I love 'em but I think they need longer springs. The car is lower than how I had my BC ERs set but scrapes less on bumps and dips at speed.

The ride is just so much better than the BC's it's not even funny. I hope to get another trip to Mid-Ohio before winter to see if I can improve the times I set with my BCs.

They're both amazing shocks, we prefer JRZ over Moton because of their customer service, support, and setup assistance.

Great video to watch!!

My only minor complaint is the same: the springs are a little short. You run out of ride height adjustment room at the top of the fronts before you can get all the way back to stock. After everything's settled I don't know that you could get any closer than ~3/4" down, but it still ends up streetable if you're careful. Could easily be corrected, though, with some kind of spacer on the spring perch, which wouldn't be hard to find/make, if you really wanted to get all the way back to stock height.

That being said, these coilovers are ******* amazing. Fuller-ish review inside my journal thread update for this past track weekend: http://www.the370z.com/members-370z-...ml#post2267458

I just might be getting. Waiting for SPONSOR to call me back. Cough Sharif! Lol

Damn. Sold out

Tell them to get more :)

I did. We are working a deal now.