Supporting mods with coilovers
 

Hey guys looking to buy some coil over soon but reading through the forums I learned that there are bunch of other things I need to get to fix the alignment after lowering the car. So far, if I read correctly, these are the things I need:

1. Front Upper Camber/Caster Arms
2. Rear Camber Arms
3. Rear Traction Arms

Are these mods the correct ones and what other ones do I need? Also z1 has a package, but I heard SPL stuff is higher quality. Is the difference a lot? SPL seems 2-3 times the price

Thanks

SPL parts flat out works. The best quality. The easiest to adjust. They hold their adjustment. The most recommended parts on this forum. Buy once and forget it. :tup:

SPL has more adjustment range and much better track record of reliability, plus easy on-car adjustment. Its not even a question - SPL is the best option. Dont cheap out

You also need either the toe arm for true type coilover or midlinks for OEM type

Z1 has documented- self admitted manufacturing issues for at least one run

Don't believe me? Read yourself http://www.the370z.com/brakes-suspen...er-arms-9.html

Oh, and the Z1's aren't adjustable on car. Gotta take 'em off. Oops

we always recommend SPL because they are the best

Awesome, makes sense. One last question, what’s true style and oem style? Bc and kws are like oem right ?

true style = spring wrapped around damper

https://farm1.staticflickr.com/677/2...35da936c_c.jpg

with this style you need SPL toe arms

https://www.splparts.com/products/re...-370z-g37.html

OEM or "divorced" style = spring separate from damper, in a bucket on one of the arms

https://www.nicoclub.com/wp-content/...ew_370Z_18.jpg

With this style you need the SPL Mid-link
https://www.splparts.com/products/re...-370z-g37.html

BE AWARE - these two different setups require different spring rates in the rear. As they have different geometry, you need roughly half the stiffness in the true type as in the OEM type. IE, a 10kg spring in rear for the OEM type is about the same as a 5 kg rear spring in true type. There is math involved, don't ask me.


EDIT:
When you get the rear suspension arms you also need to get the Eccentric Lockout kit:
https://www.splparts.com/products/ec...-370z-g37.html

These are important because once you have all these adjustable arms, you want to use THEM for adjusting alignment. The factory setup in the rear uses two eccentric bolts on each side; these will slip and **** up your alignment. You no longer need the adjustment point so locking them in place eliminates that weak point

Optional, you don't NEED to replace these:
https://www.splparts.com/products/bu...-370z-g37.html

These are simply convenient to install when the car is up and you're doing an alignment.

A word of advice - do not cheap out on alignment components!!! Do it once- do it RIGHT. SPL all the way. The other **** is 2-3x cheaper for a reason. I got true rear coils and am very pleased with the ride and adjustability.

Okay SPL stuff it is. z1 seems to be selling it cheaper than SPL website, is Okay to buy it from them? Also guys OEM style coil overs are mostly all the brand names people usually buy right ? Like bc racing, kws and rs-rs? Still a bit confused since none of the coil overs ever mention oem or true style besides couple I saw on z1 that said true style.

Online code!
 

Yes. You can buy SPL parts from Z1. I bought almost the SPL whole catalogue from Concept Z performance. I believe they also have free shipping on these parts right now too! Check it out


BONUS TIP Use the online code ONETIME at checkout to save 10% on your order. Buy everything at once as the online code is good for only ONE use. Best wishes!

Watch the for sale section, spl stuff pops up

Assume OEM style unless specified otherwise. Some places offer both

Shop around and get the stuff whoever is cheapest for you. It all ships from SPL anyways

Since wheels are the next step, read this first
http://www.the370z.com/wheels-tires/...tart-here.html

Thank you guys for all the info. For wheels I ended up going with konig Dekagrams and dropped down to 18inch rims. I didn’t read that thread before buying them but I hope everything fits.

18x9.5 +25 255/45/18 pilot sport a/s 3+ (too much rain in Vancouver)
18x10.5 +18 285/40/18 same on the back

I just hope I don’t need spacers. Front wheels supposedly aren’t concave so hopefully enough brake clearance and backs are the concave profile.

They’ll fit. They will look ok at best. Those aren’t a very attractive design

You can much more aggressive since you’ll have full adjustment
The thread will have examples

You can easily fit these (not mine):
http://www.the370z.com/parts-sale-pr...tin-black.html

Honestly the weight of the rims and price was too hard to pass on. Just gotta start saving money for some good coil overs. Any recommendations? I was thinking kw1 or rs-r.

I've got KW V3's and really like them. Everyone has their own personal preference though.

Also, are you going to do a front sway bar?

Already got one on the way with SPL endlinks. Got the front hotschik..... 100% spelt it wrong.

Good choice on both.

Folks seem satisfied with the kw v3’s build quality and greet comfort but they are not up to snuff for performance oriented driving. Also, limited lowering capability, no top mounts and no pillowballs anywhere

Heard very little of the rs-r but the specs indicate similar limitations

Fortune Auto and PowerTrix are in the same price range and give you pillow balls more adjustment with rebuild ability stateside and customization if you want. I think BC does too.

Hotrodz here tracks his car on fortunes effectively. Jarblue as well

Jar's a parts collector/hoarder.

KW V3's are more than capable for spirited street/canyon driving. They also have 2" front and 1.7" rear lowering capabilities. My current car came with BC ER's and they were so bad, I removed them and replaced them with the KW's. Not an expense I wanted at the time but the BC's were complete junk.

V3 is very capable. The only thing I’ve heard is spring rate isn’t high enough to use with full slicks.

I forgot his username...a known track guy, he tracked a motoiq 370z with V3

Clintfocus

What do you guys think of tein flex z?

Thanks for the referral brother! (Can’t believe there has been no interest...guessing people prefer Work Meisters over SSR Professors *)

I prefer professors over meisters myself

I run the V3's along with spl front and rear billet arms. going back I wish i wouldve went with fortune 500's cause the KW's squeak like a mofo

if youre going all out with suspension youd be a fool not to run crazy specs in my stupid opinion.

good luck with everything!!

Are you running a Hotchkis front sway bar? The only squeak I ever had came from the the sway bar and I've had KW's on both my z's.

I prefer monoball mounts on the coilovers

I went the powertrix route because of Charles support and I’ve been happy with them but like most I don’t have anything to compare them against. The thing that turned me off to the V3’s were they don’t give the coil spring rate and then when I called and got someone to give me the rate they seemed rather soft compared to other options and then also they are progressive rate springs which I’m just not a fan of. I tested them in my buddies m3 (he likes em) and I know it is not apples to apples at all but it still had that unsure lean over in turns that I feel is largely due to the progressive spring since every car I’ve driven that has progressive springs has that same sensation. Also his make noise as well. An option that is now available that was not when I got mine is the Greddy coil overs which are using KW single adj. dampers but with linear springs. Otherwise the powertrix have held up well and I believe they are on a big sale again so great time to buy if your looking that route.

I bought mine used, but note that Concept Z also price matches. They'll match the Z1 price and provide much better customer service :twocents:

LOL ... well, that is that plan anyway. They are still in the box though :(

Install scheduled for later this year. I purchased them because they were a local sale at great price. I chose them because of Hotrodz's experience :driving:

:iagree: I will be purchasing a Fujimura titanium strut bar later this week :D

:iagree: :iagree:

Is it okay to install spl front and rear camber arms without coilovers? I returned my tien coilovers n got the front/rear spl. I am just gonna save up for kw3 or fortune auto coilovers

if you’re on stock suspension there’s no NEED for them

You are better off installing arms and coils together so you can set the height, then alignment all at once.

Why pay for two alignments?

But i mean theres no reason they wont “work”. Adjustability is adjustability

Yeah, it's ok. But you will be paying for 2 alignments.

hey guys,
So I ordered KW3 and I have spl front/rear camber arms. For kw3 do I need the spl mid link? Also do I need the spl eccentric lockout kit? Tried searching didnt find anything.

KW v3 are OEM type (spring divorced from coilover)

However, because they use a PROGRESSIVE spring, you get a whacky, varied diameter spring in the rear like this:

https://photos.smugmug.com/MotoIQ/Pr...0%20035-X2.jpg

For OEM type, coilover owners should get the SPL mid-link, which looks like THIS:

https://cdn10.bigcommerce.com/s-xn4b...0.1280.jpg?c=2

The SPL mid-link requires 65mm ID springs (roughly 2.5 inches)

This leads me to believe the progressive spring will NOT work with the SPL mid link.

My recommendation would be to CALL SPL and see what they recommend. They've always been super helpful.

or you can cancel the order on the stupid KW's and get fortunes or something that have more adjustment range and use linear springs

The SPL mid links only work with straight springs of 2.5", 65mm springs. They won't work with a oem or taper springs.

right

the SPL midlink/toe arm normally is what takes over toe adjustment.
If he can't use that i think he's stuck with the stock eccentric bolt

the traction arm does stuff too but adjustment is impacted without the adjustable arm there

another reason why KW should not be preferred

So I called SPL and they said I will have to change the springs to be able to use the midlink. I guess i will have to purchase some Swifts. So guys do i still need the eccentric lockout kit?