40 replies to this topic

[DAN K.]

[email protected] used to post more back when the RS Pro Silents were released. Might want to send him a PM with a link to this thread.

Bryan is a good guy.
If he has time hopefully he could chime in.

I do know these JRZ's keep evolving and new data comes to the surface each season.

[Ben Linney]

UK Suspension

exe-tc

http://www.exe-tc.co.uk/ used on the Sumo/Nismo GT1

Nitron

http://www.nitron.co...r35-gt-r-ntr-r3

[Cicio]

Both the JRZ and the KW are a great option for the GT-R. While we have never done back to back testing we have had lots of experience with both systems.

Bottom line in either of these choices is going to be setup. Someone who knows what they are doing with coupling spring rates with the car to meet the customers goals, as well as a qualified person to turn the knobs. I have ridden in 1200whp cars with sleeves vs one with JRZs and I will tell you that the JRZ makes for a much more confidence inspiring 180mph ride The drivers actions are much more connected to how the car actually responds and the chassis is much more compliant as a whole.

I know Bryan is on his way to a trade show in Orlando so probably won't have time to jump in here for a few days at least.

[DAN K.]

Both the JRZ and the KW are a great option for the GT-R. While we have never done back to back testing we have had lots of experience with both systems.

Bottom line in either of these choices is going to be setup. Someone who knows what they are doing with coupling spring rates with the car to meet the customers goals, as well as a qualified person to turn the knobs. I have ridden in 1200whp cars with sleeves vs one with JRZs and I will tell you that the JRZ makes for a much more confidence inspiring 180mph ride The drivers actions are much more connected to how the car actually responds and the chassis is much more compliant as a whole.

I know Bryan is on his way to a trade show in Orlando so probably won't have time to jump in here for a few days at least.

Thanks for the input Cicio,
Are you able to say what springs you use for the R35's? ( spring rates/ brands)

would going with 1000's for the fronts and 800's for the rear be advisable?

[Cicio]

Thanks for the input Cicio,
Are you able to say what springs you use for the R35's? ( spring rates/ brands)

would going with 1000's for the fronts and 800's for the rear be advisable?

IMO that is far too stiff. Unless you are running Road Course on slicks in which case it is close.

For a street car I would recommend something much closer to 800/600

Of course it all depends on tire setup, sway bar setup, driving style, aero and a few other variables as well.

[Chadbee]

If it possible for you to own them, buy them. I have a 350Z and I bought JRZ RS for my car. People think I'm crazy for spending 1/3 of the price of my car on shocks but they are just THAT good.

Trust me, you want those coilovers on your car lol

[UnaBomber]

I could not be happier with my JRZs that Cicio set up.

From my first experiences with them at VIR i knew they were worth every penny

[GTB/ZR-1]

[email protected] used to post more back when the RS Pro Silents were released. Might want to send him a PM with a link to this thread.

Bryan's a real good guy & was very helpful to me while I set my Triples up. I finally got them dialed in, then promptly sold the car...

Nearly new Triples FS in member's classifieds! lol

[Techevo]

It would be nice if there was a JRZ representative on this forum. He or she could probably give some good insight and really help some people out.
I also believe there are a good amount of R35's with their systems installed.

I wonder what they believe would be the optimal configuration for the RS Pro's on our cars? (spring rates/ settings)
We all know their are books on setting up suspensions and this discussion could get rather lengthy, but maybe JRZ has enough data by now that they would recommend a set up.

Just a thought.

It's a very good thought, if another user has spent time and effort setting up their JRZ pro's and found some good settings, then this would at least give you a starting point, and from there you can tweek it to obtain the balance and compliance you prefer.

Suspension set-ups are a bit like wine, individuals have their preference on what they like!

What I will say is, depending on tyres used and roads driven, adjust the compression setting to obtain the preferred compliance, if too soft the car may hit the bumpstops too often or feel too vague in turn-in and left/right/left transitions (anti-roll bars also affect these last two points) If too hard, the car will feel too bumpy for you and hitting bumps will push the car upwards and tend to loose grip/thow off line in a corner.

Spring rates used also have a big effect on roll/dive/squat, but hopefully these will be in the ball park for the type of usage of the kit/car.

With rebound adjustments, you want to adjust to the soft side and feel how it makes the car feel. To soft and it will feel floaty and have and unstable feel at higher speeds, due to the car rising (rebounding) too quickly after a compression. Keep hardening the rebound by one click at a time L/R, but one end of the car at a time. As the rebound becomes too hard, the car will again start to loose grip/traction and feel harsh.

You can also adjust balance a small amount, the end that is too hard, loosing grip first.

Try and imagine in your head what the suspension is doing, in basic terms the springs are supporting the car, the compression damping in controlling how quickly the suspension will compress when hitting a bump, and the rebound how quickly the shock extends, against spring pressure. If set right, when a bump is hit, the wheel/tyre should follow the up-ramp of the bump (compression) and the down-ramp of the bump (rebound) with the car/chassis staying in the same plane, ie, not moving up or down.

If the compression is too hard, the up-ramp of the bump will try to 'launch' the car upwards, and at the peak of the bump the wheel may leave the ground (exaggerated!) and if the rebound is too hard, the wheel will take off at the peak as it cannot extend quick enough and follow the down-ramp of the bump. This loosin grip and feeling harsh when the wheel lands!

Also try to 'feel' and seperate what the front and rear of the car is doing, to help you understand what is happening.

Hope that helps in some small way.

Edited by Techevo, 27 November 2012 - 04:57 PM.

[changstr]

Thanks for the feedback from everyone. The takeaway I got from this is there's no way in hell I'm doing suspension without someone setting it up for me. Way too many variables. And Litchfield's setup is a good option for a set it and forget it type setup where anyone can set it up.

[Techevo]

Thanks for the feedback from everyone. The takeaway I got from this is there's no way in hell I'm doing suspension without someone setting it up for me. Way too many variables. And Litchfield's setup is a good option for a set it and forget it type setup where anyone can set it up.

Definitely a very good decision, there are far too many people driving cars with 'upgraded' adjustable suspension that have not been set-up correctly due to lack of time/effort/knowledge and are actually a back step-up from the standard stuff they have removed.

There is a reason race teams spend hours data logging and adjusting suspension set-up to be able to find the 'sweet spot' it's deffo not fit and forget!

[s4play]

How much are the JR coils vs. the KWV3's?

I don't plan to track the car, never will race it and mainly use the car for a daily driver. I had KWV3's on my past cars and it made an immediate improvement in ride quality. (prior it was very choppy)

I drove a 2013 BE the other day and I found the ride tight but a but rough. Looking to soften things up a bit...so KWV3 or the JR?

[AutoXGTR]

KW Variant 3 Coilovers (2009-2011)
From $3775

JRZ RS Pro Silent Edition Coilovers (2009-present)
From $5700

[DAN K.]

KW Variant 3 Coilovers (2009-2011)
From $3775

JRZ RS Pro Silent Edition Coilovers (2009-present)
From $5700

Hey AutoXGTR, what coilovers are you running.

If they are aftermarket what factors were important to you and how did you choose spring rates?

I have the JRZ's RS Pro's and trying to figure out the best configuration for maximum performance. Comfort is not a big concern. High speed stability and corning is the main focus.

thanks

[mbrownew]

I was at that stage about a year ago trying to decide whether the JRZ's were worth the money for a primary track vehicle. I think the decision first starts on whether you feel an improvement is needed. If you have an extra $5700 laying around then its an easy decision that they are a great upgrade. But like 99% of us we need to decide where we want to spend our money and whats going to provide the best benefit for the money. For those just getting into tracking your vehicle and I would say it would not be justified at this time. If you continue to pursue your track experience and you get to a point that you are pushing the boundaries of the car then it becomes decision time as to what is the best upgrades to provide the most benefit. If you want the most benefit for the track to get better and lower track times safely try and hire a driving coach to help you work on things that will make you a better driver. This will knock seconds off your times immediately. Its also alot less expensive than many upgrades. Once you become a better driver and you are exploring the limits of the car then it becomes a budget question. You don't want to spend almost $6000 for these and not have money for consumables like track day fees, tires and brakes. Again assuming you have the budget to move forward I think one of the first things I would add would be adjustable camber arms for the front like the Dodson units. They allow you to adjust the camber so you don't destroy your tires when tracking. The tire tends to roll over with the standard camber settings and you just eat up tires if you are pushing the car. Next might be wheel and tire upgrades. Many options and many points of view so I won't go over that. I think the next major upgrade should be upgrading the braking performance. Changing rotors and pads are probably the most common and cost effective. Some believe an upgrade in sway bars are in order and I would list them in at this point. I think now would be the time to make the decision on the JRZ's. Are they worth the money was your original question. Well if you have the money and have someone who knows what they are doing set them up they are the most effective suspension upgrade for the car in my opinion. If the money is a determining question then review other options for coil-overs etc with varying levels of performance.

[7racer]

I was at that stage about a year ago trying to decide whether the JRZ's were worth the money for a primary track vehicle. I think the decision first starts on whether you feel an improvement is needed. If you have an extra $5700 laying around then its an easy decision that they are a great upgrade. But like 99% of us we need to decide where we want to spend our money and whats going to provide the best benefit for the money. For those just getting into tracking your vehicle and I would say it would not be justified at this time. If you continue to pursue your track experience and you get to a point that you are pushing the boundaries of the car then it becomes decision time as to what is the best upgrades to provide the most benefit. If you want the most benefit for the track to get better and lower track times safely try and hire a driving coach to help you work on things that will make you a better driver. This will knock seconds off your times immediately. Its also alot less expensive than many upgrades. Once you become a better driver and you are exploring the limits of the car then it becomes a budget question. You don't want to spend almost $6000 for these and not have money for consumables like track day fees, tires and brakes. Again assuming you have the budget to move forward I think one of the first things I would add would be adjustable camber arms for the front like the Dodson units. They allow you to adjust the camber so you don't destroy your tires when tracking. The tire tends to roll over with the standard camber settings and you just eat up tires if you are pushing the car. Next might be wheel and tire upgrades. Many options and many points of view so I won't go over that. I think the next major upgrade should be upgrading the braking performance. Changing rotors and pads are probably the most common and cost effective. Some believe an upgrade in sway bars are in order and I would list them in at this point. I think now would be the time to make the decision on the JRZ's. Are they worth the money was your original question. Well if you have the money and have someone who knows what they are doing set them up they are the most effective suspension upgrade for the car in my opinion. If the money is a determining question then review other options for coil-overs etc with varying levels of performance.

Great opinion! I had a great day at the track and was just looking if I should go with these or not. Great timing.

[mbrownew]

Great opinion! I had a great day at the track and was just looking if I should go with these or not. Great timing.

Great opinion! I had a great day at the track and was just looking if I should go with these or not. Great timing.

I am like most an average driver but enjoy the thrill of pushing the limits of myself and the car. That of course is why I bought the vehicle in the first place. But I think you also need to have some common sense on how you go about spending money on this expensive toy we have. Enjoy the experience and be safe on the track.

[Sunkizz]

UK Suspension

exe-tc

http://www.exe-tc.co.uk/ used on the Sumo/Nismo GT1

Nitron

http://www.nitron.co...r35-gt-r-ntr-r3

Any reviews on them? Thanks

[aaa335]

great info in this thread, Wonder if the new Aragosta set up that maintains the in car suspension adjustment modes takes out some of the difficulty of properly setting up coil overs.

[AutoXGTR]

Hey AutoXGTR, what coilovers are you running.

If they are aftermarket what factors were important to you and how did you choose spring rates?

I have the JRZ's RS Pro's and trying to figure out the best configuration for maximum performance. Comfort is not a big concern. High speed stability and corning is the main focus.

thanks

I don't have coilovers. Only Swift springs with OEM shocks. The drop is 1" front and rear. This setup is fine for street use, too soft for autocross or track. Just a low cost upgrade to the suspension to get started.

If I had to switch I would consider JRZ Pro Silent but then I would also add wide fender kit, extra wide 12" wheels front and rear, 315mm wide race tires, etc.

Edited by AutoXGTR, 26 January 2015 - 06:48 PM.