Nissan Z Lowered Suspension Questions

[C89]

That’s good advice. I’m thinking that Maybe the 2025 RZ34 Nismo will be the last ICE Z that Nissan does. IF so, it will be worth more if it’s kept stock.

In my post I was asking:
Are the *branded Nismo parts* (you buy in the US) the same as the JDM Nismo parts that come on a brand new Z? Someone would know if Nismo Japan uses branded products. Or if they all are developed in-house. Or a mixture.

I'm of the same thinking as you, trying to not to do any irreversible mods at all.

As for Nismo parts from US, from what I've read and seen, Nismo US used manufacturers in the US to develop and manufacture some of those parts. Just like the US Nismo CAI, which I think is made by AMS? I also know that Nismo Japan doesn't even have those for sale. Same with the strut tower brace, the ones in the US is aluminium, and the ones in Japan are titanium and it is 3-4x more expensive.

Whereas other Nismo parts like oil/fuel caps, radiator caps, carbon mirror covers etc, are brought in from Japan.

These are the parts available in Japan from Nismo:
https://www.nismo.co.jp/products/web_catalogue/model_z.html

 

[trackratZ]

I'm of the same thinking as you, trying to not to do any irreversible mods at all.

As for Nismo parts from US, from what I've read and seen, Nismo US used manufacturers in the US to develop and manufacture some of those parts. Just like the US Nismo CAI, which I think is made by AMS? I also know that Nismo Japan doesn't even have those for sale. Same with the strut tower brace, the ones in the US is aluminium, and the ones in Japan are titanium and it is 3-4x more expensive.

Whereas other Nismo parts like oil/fuel caps, radiator caps, carbon mirror covers etc, are brought in from Japan.

These are the parts available in Japan from Nismo:
https://www.nismo.co.jp/products/web_catalogue/model_z.html

Thanks for that clarification. Looks like the Nismo JDM parts - sway bars, titanium brace - don’t even have separate part numbers to order by. I’ll be visiting Japan again next year, will ask the Nismo rep if even possible to order.

 

[C89]

Thanks for that clarification. Looks like the Nismo JDM parts - sway bars, titanium brace - don’t even have separate part numbers to order by. I’ll be visiting Japan again next year, will ask the Nismo rep if even possible to order.

The "titanium tower bar" has a part number of 54420-RSZ45, it is 198,000 yen inc tax.

https://www.nismo.co.jp/products/web_catalogue/suspension/titanium_tower_bar_rz34.html

 

[alienpoker]

The "titanium tower bar" has a part number of 54420-RSZ45, it is 198,000 yen inc tax.

https://www.nismo.co.jp/products/web_catalogue/suspension/titanium_tower_bar_rz34.html

Holy Shite! $1350 + shipping for titanium? Sounds reasonable…

 

[FSUZ33]

Question on camber adjustment and coilovers.

Many coilovers have top plates with slots to adjust camber. From what I understand the lower attachment for the shock/strut is a pivot point, not a solid attachment, correct?

I thought camber adjustment was done via the upper control arms. Correct me if I’m wrong as I could be missing something obvious. Wouldn’t changing the upper position of a coilover within that camber plate only change the vertical angle of the coilover (pivoting on the lower attachment point) not the vertical angle of the wheel?

 

[VR30Infection]

Question on camber adjustment and coilovers.

Many coilovers have top plates with slots to adjust camber. From what I understand the lower attachment for the shock/strut is a pivot point, not a solid attachment, correct?

I thought camber adjustment was done via the upper control arms. Correct me if I’m wrong as I could be missing something obvious. Wouldn’t changing the upper position of a coilover within that camber plate only change the vertical angle of the coilover (pivoting on the lower attachment point) not the vertical angle of the wheel?

When you see a coilover that has an adjustable top hat for camber and or caster, that is on a McPherson strut. The Z has wishbone and the only way to change camber is with adjustable upper control arms.

 

[nismo95tt]

Hello all,

I'm planning my upcoming exhaust upgrade. I'm looking at AWE Track Cat Back,

https://www.awe-tuning.com/products/awe-exhaust-for-the-nissan-z

• AWE Exhausts have been track-tested and confirmed to fit vehicles equipped with up to 1-inch lowering springs.

This leads me to research here regarding future lowering springs and suspension mods.

I'm looking for a little stiffer springs to use with stock shocks alongside Stillen sway bars. This will be for street use only, no track. I want to lower the Z just a tad, but also not have to worry too much more than I already do about scraping everything everyday...this is my daily driver.

Are the RSR springs the smallest drop lowering spring?

https://www.rs-r.com/product/nissan-z-2023-down-sus-springs

Spring Rate
Front: 10.2kg/mm
Rear: 8.13kg/mm

Approximate Drop
Front: -15mm to -20mm (-0.6in to -0.8in)
Rear: -25mm to -30mm (-1.0in to -1.2in)


Also looking at Swift Springs which seem a little stiffer.

https://www.swiftsprings.com/pages/swift-performance-springs#NISSAN

Specifications for Swift Spec-R Springs on the 2023+ Nissan Z (RZ34):

• Front Spring Rate: 11.3 kg/mm
• Rear Spring Rate: 10.0 kg/mm
• Front Drop: -1.1 inches
• Rear Drop: -1.1 inches

I took a quick look at Eibach but they have a 1.2" drop in the front (which is not ideal) and no listed stiffness (maybe b/c they are progressive rate?).

https://eibach.com/product/E10-63-048-01-22?epsid=3460

Conceptually I like the idea of a progressive spring that is more forgiving for daily driving, but stiffens up when cornering. Are there other progressive springs for the Z?

Does anyone know the stock spring rate for a 2025 Performance Z? How would the choices above compare for a daily driver? Any others I should consider? Anyone have these who can comment and compare to stock ride quality/comfort?

Thanks in advance!

 

[tractng]

Hello all,

I'm planning my upcoming exhaust upgrade. I'm looking at AWE Track Cat Back,

https://www.awe-tuning.com/products/awe-exhaust-for-the-nissan-z

• AWE Exhausts have been track-tested and confirmed to fit vehicles equipped with up to 1-inch lowering springs.

This leads me to research here regarding future lowering springs and suspension mods.

I'm looking for a little stiffer springs to use with stock shocks alongside Stillen sway bars. This will be for street use only, no track. I want to lower the Z just a tad, but also not have to worry too much more than I already do about scraping everything everyday...this is my daily driver.

Are the RSR springs the smallest drop lowering spring?

https://www.rs-r.com/product/nissan-z-2023-down-sus-springs

Spring Rate
Front: 10.2kg/mm
Rear: 8.13kg/mm

Approximate Drop
Front: -15mm to -20mm (-0.6in to -0.8in)
Rear: -25mm to -30mm (-1.0in to -1.2in)


Also looking at Swift Springs which seem a little stiffer.

https://www.swiftsprings.com/pages/swift-performance-springs#NISSAN

Specifications for Swift Spec-R Springs on the 2023+ Nissan Z (RZ34):

• Front Spring Rate: 11.3 kg/mm
• Rear Spring Rate: 10.0 kg/mm
• Front Drop: -1.1 inches
• Rear Drop: -1.1 inches

I took a quick look at Eibach but they have a 1.2" drop in the front (which is not ideal) and no listed stiffness (maybe b/c they are progressive rate?).

https://eibach.com/product/E10-63-048-01-22?epsid=3460

Conceptually I like the idea of a progressive spring that is more forgiving for daily driving, but stiffens up when cornering. Are there other progressive springs for the Z?

Does anyone know the stock spring rate for a 2025 Performance Z? How would the choices above compare for a daily driver? Any others I should consider? Anyone have these who can comment and compare to stock ride quality/comfort?

Thanks in advance!

I just bought the RSR springs today. I want a slight drop. From the research here, the springs are considered to be good for daily car.

 

[nismo95tt]

I just bought the RSR springs today. I want a slight drop. From the research here, the springs are considered to be good for daily car.

Did you install your RSRs? Did you need other suspension components like upper control arms to get your alignment/camber correct? Can you please send some pics? Thanks!

 

[OptionZero]

I'm of the same thinking as you, trying to not to do any irreversible mods at all.

As for Nismo parts from US, from what I've read and seen, Nismo US used manufacturers in the US to develop and manufacture some of those parts. Just like the US Nismo CAI, which I think is made by AMS? I also know that Nismo Japan doesn't even have those for sale. Same with the strut tower brace, the ones in the US is aluminium, and the ones in Japan are titanium and it is 3-4x more expensive.

Whereas other Nismo parts like oil/fuel caps, radiator caps, carbon mirror covers etc, are brought in from Japan.

These are the parts available in Japan from Nismo:
https://www.nismo.co.jp/products/web_catalogue/model_z.html

Nismo suspension parts (adjustable arms) are rebranded/recolored parts from SPL Parts.
They're better than Z1, used on track cars everywhere, and will make your alignment tech thank you.
Adjustable on car with ease.

Everyone should be running the SPL/Nismo Front Upper Control Arms, since Nissan didn't bother adding front camber adjustment. They are camber/caster adjustable and open up more or less unlimited wheel fitment.

 

[trackratZ]

Nismo suspension parts (adjustable arms) are rebranded/recolored parts from SPL Parts.
They're better than Z1, used on track cars everywhere, and will make your alignment tech thank you.
Adjustable on car with ease.

Everyone should be running the SPL/Nismo Front Upper Control Arms, since Nissan didn't bother adding front camber adjustment. They are camber/caster adjustable and open up more or less unlimited wheel fitment.

Are you currently using these SPL front arms? If so, is -3 deg possible on the adjustments? I have the Spec-R springs in the box for early next year install and need the camber adjustment because will run 10.5" wide wheels squared with +20-+25 offsets

 

[FSUZ33]

This is SPL's comment regarding the ranges on a Z34. Even if for some reason the limits aren't the same for the RZ34 they've got to be really close.

"Adjustment ranges: On a 2009 NISMO test car, we reached -4.8 degrees of camber at 5 degrees of caster. At -4 degrees of negative camber, we achieved 6.5 degrees of caster, and at -3.5 degrees of camber, we could get to 7.7 degrees of caster. Camber correction was measured at 0 degrees of camber."

 

[OptionZero]

Are you currently using these SPL front arms? If so, is -3 deg possible on the adjustments? I have the Spec-R springs in the box for early next year install and need the camber adjustment because will run 10.5" wide wheels squared with +20-+25 offsets

Yes, as the post above this mentioned, you can get nearly -5 if you want, and more if you increase caster, which is also adjustable.

I run -3 front and -2 rear on track (i have all the SPL rear arms). I have 18x11 +16 Enkei RS05RR with 275/40 tires

This is not a daily but when I put on my hardpark stance wheels for "Street" i am at around -4 front, -5 rear bc the sizes are 19x10, -1 front and 19x11, -6 rear.

 

[Thefunk]

Nismo suspension parts (adjustable arms) are rebranded/recolored parts from SPL Parts.
They're better than Z1, used on track cars everywhere, and will make your alignment tech thank you.
Adjustable on car with ease.

Everyone should be running the SPL/Nismo Front Upper Control Arms, since Nissan didn't bother adding front camber adjustment. They are camber/caster adjustable and open up more or less unlimited wheel fitment.

Yes pricey but worth it.

 

[FSUZ33]

Can someone explain to me why wheel offset or spacer thickness differs based on the ride height?
Example: At stock height I can run "X"mm spacers, but if lowered I can run "Y"mm spacers.