Z1 Motorsports 370z Adjustable Suspension Kit? Any Good?
 

Looking into swapping out the stock stuff for adjustable arms and all while doing coilovers at the same time. I was wondering if anyone here has used this "kit" and if they enjoy it? + it fits my budget.

I am mainly concerned about reliability of the kit since it is my daily and I don't want to have to worry about stuff going wrong down the road... also concerned about the fitment and quality of these arms? I have seen some z1 products lacking in either quality or fitment and this is one I don't want any problems with when I go to tear my car fully apart.

Another question is should I stick with the SPC adjustment bolt kit or go all out on the z1 toe arms too? It would be out of my budget if i went with the toe arms but would it benefit me any in the long run?

Not reliable at all. Bite the bullet and go with SPL. They will outlast the car and probably you and your progeny.

Useful for people needing to maintain rubber bushings, but the front upper control arms require removal at each pickup point for adjustment.

If rules allow for sphericals, then SPL is much better.

Get the SPL's. There is a reason why everyone here uses them. They work with no issues. You don't have to remove the arms to make adjustments like you have to do with other arms. The only reason not to get them is if you do autox and the rules say that you can't use them.

Just go whole hog and buy the SPL FUCAs, rear mid link, camber, and toe arms. Do it once and be done. You'll save $300 on alignments if you do it all at once, and you'll save infinity on alignments in the long term; because you'll never need one ever again.

Z1 is ****

SPL is bulletproof, better adjustment for you alignment tech, more range, better support

I only plan to keep this car on the street, I just want a better more responsive feel while driving. Would it be a waste of money to go with all SPL stuff if that is all I am doing with the car? If the z1 stuff is not reliable, what other brands would be a good option that would fill my needs? I am going to check out SPLs stuff and price everything out and see what I can do money-wise though since I really like their stuff and have seen it used a lot.

As has been stated above, go SPL and move on! My Z is a weekend fun car and may get out for a few miles, 1-3 times a month. That being said, I still bit the bullet and went SPL. ZERO regrets and will be buying more from them in the future given the quality, the ease of adjustment and the peace of mind that their parts provide.

Not at all a waste of money. Don't get me wrong, SPL is expensive as heck. But you're really buying peace of mind. SPL is about the only aftermarket stuff on my Z that I dont worry about when I'm driving

I had the z1 kit for years. Primarily for autocross. It's a pain to adjust but I never had any rattles. Good budget option for a person who is just looking to lower the car and won't be making changes all the time. SPL is great but completely overkill for that scenario.

Yeah but your first Z got murdered by hail which was attracted to the Z1 kit like filings to a magnet. It's #science

Lol. SPL would have stopped that for sure.

I have the Z1 front arms. the only downside is that you have to take the wheel off to adjust the alignment, which ends up costing a little more. Other than that, my alignment specs have not deviated significantly in between appointments, so they are at least reliable. I would recommend SPL if you're going to change alignment settings often though, as the cost comparison will eventually favor the SPLs down the line.



I have SPL rear camber arms with the toe bolts. They work as expected.

I’ve been looking into coilovers with true style rears. Is there anything to replace the rear mid link with that doesn’t have the huge bucket for the spring?

SPL Rear Toe Arms

Which SPL offers 2 styles. A billet version and a tubular chromoly version, not sure of the differences between the 2. Along the lines of SPL, they offer rear traction arms (1 style), rear camber links and rear camber arms. I’m assuming they replace the same OEM part but again just differences in style for different applications and also rear sway bar endlinks. As far as the bushings go, there would be no need to buy those as they come with the other parts? Lastly,if you get the eccentric lockout kit they have available, would you still need the rear toe bolts?

Billet costs more. Might be more strength if you're absolutely beating the f out of the Z, but not worth it.

SPL sells rear camber links and arms (only difference appears to be one is billet one is not), traction arms, and mid-links - or rear toe arms if you're going divorced like JAR :stirthepot: .

The bushings they sell replace the OEM bushings on the knuckles; they do not come with the arms or links. No real need for those unless you're going whole hog.

Eccentric lockout comes with its own bolts so no need to keep OEM bolts.

Got that backwards. The mid-links (w/ spring bucket) are for a divorced rear suspension setup like stock. A true type suspension setup uses the toe arms instead of the spring bucket.

I can’t remember which thread I read it on, but IIRC, the lockout bolt is sorta important in the sense that the factory bolt slips? Or something like that which throws your alignment off? If you do “get the entire catalog” from SPL what are the chances the factory bushings on the knuckle will go, you’re better of replacing them while you have the whole suspension apart I would think?

correct

From the factory, the rear camber is adjusted with an eccentric bolt (it's "offset" such that you rotate it, and the arm changes length). These are prone to slipping over time, so your alignment is altered

Lock out bolt is just what it sounds. Instead of an adjustable bolt, the lockout bolt stays in place and locks the control arm in position.

The SPL arm itself is adjustable in length, and that is how camber is then adjusted

Bushing replacement is more expensive and time consuming. If you have the time and money, do it; but if you stuff isn't worn, its not needed

Hopefully after 30k miles the bushings are fine.

The rear knuckle bushings are fine. Only replace them if you want the most out of the car.

Not sure if this is the right place to ask but since it’s sorta on topic, has anyone reading this thread or keeping up with it installed the SPL parts themselves? If so on a scale of 1-5 how difficult was it and did you need any “specialty” tools? I’m gonna guess no more than a 3 but that might be my lack of suspension work.

Guess you didn't look hard enough.

http://www.the370z.com/brakes-suspen...uspension.html

http://www.the370z.com/brakes-suspen...on-almost.html

http://www.the370z.com/brakes-suspen...ml#post3825514

:tiphat:

Installed my FUCA/rear camber arms (both SPL) and coilovers myself. Read the walkthroughs and you'll be all set. Wasn't difficult at all after I did my research and knew what was ahead of me.

Rusty's threads will tell you everything you need to know. Most of the suspension bits are fairly straightforward. The bushings are the most likely areas that'll give you trouble.

I have some SPL stuff and very pleased, like everyone else says. Check Voodoo13 as it seems to be equivalent quality to SPL.

Shame on me because I did not look at all haha Looking back however, my question of difficulty 1 to 5 probably wasn’t a great question either as mechanical experience could lead 2 people to 2 different answers. When the time comes, if this is something I’m willing to take on, Rusty did provide great write ups on this and it will be greatly appreciated saving a few clicks in the search ����

you're going to need a professional alignment anyways, so unless cost is really that big an issue . . . I just dumped mine off at a shop

they'll thank you for having super duper easy to adjust arms though

I’ve got the Z1 UCA’s and I’m happy with them. Yes they are more difficult to adjust, but if you are only going to change camber once you lower your car it’s really not that big of a deal. Yes the SPL stuff is nicer, but it has better be for the price difference. I’d say the Z1 suspension pieces are price appropriate and can be reliable. It’s not junk, but it’s not top of the line.