anyone tracknig with stock trailing arms?
 

At about 8-9K miles, this is what happened to my trailing arm bushings.

What are my choices for aftermarket:
SPL: very expensive lol
Kinetix: uses polybushings

Anything else out there?


http://sphotos-b.xx.fbcdn.net/hphoto...47535939_n.jpg

Actually we are as we are not allowed as of yet to change those arms.
Those bushings need to either be a delrin spherical or alum spherical
... Or the OEM rubber bushing.
Dwnshift

did you press in poly bushings in there? I have about 13K miles now, about 14-15 track days...

I know on my infiniti qx4 I had the same problem, the stock bushings were crap.... had to press in all new poly.

Nope
Unfortunately we have to run that OEM arm as is.
We would like to change it out ... Are not allowed to at the moment.
That particular bushing needs to be free and have movement in an arch... So a straight poly bushing will bind the rear arm as is goes through its motion.... It's not just straight up and down... It twists ... Which is exactly why the rubber rips.
Dwnshift

my only option at the moment are these:
For about $100-150
http://www.amplifiedmotorsport.com/p...KINCAMREAR.jpg

or $300 for SPL
https://www.splparts.com/store/avact...PLRTRZ34_0.JPG

Get the SPL ones or another set of OEM.
The SPL are fairly heavy but the spherical on the end will not bind.
The reason the arms are expensive is that spherical on the end..... They are not cheap.
A striaght bushing such as shown in the other arms will bind as it travels through its motion.
If we get arms approved we will design our own version but until then.....
Dwnshift

Thanks for the reply! I just wonder how these will feel as I DD the car and drive to and from the track...

My car has all SPL in rear. No difference in feel. And I'd say they aren't that heavy either as indicated by other post. They are very close to stock weight but are far more beefy and well made.

http://lh6.googleusercontent.com/-ij...1AE90C762E.JPG

I have the SPL pieces as well, no issues.

This all had me worried, so I checked mine when swapping tires for this weekends event today.

19000 miles, at least 14000 on track, and the OEM are holding up just fine.

Wow wtf is wrong with my car then

Nothing probably, just conditions vary a lot. More time parked outside? Bushing got more water exposure over time? More heat? Different tire/suspension/alignment config putting different stresses on it?

If you are using them... They will rip eventually.
;)

You can always say that you are driving faster than everyone else, resulting in faster wear....

Kinetix don't allow free range of motion.
SPL are not expensive and have a smooth spherical bearing, I just wish the "fork" was a little beefier. Not sure why they are double adjustable either, when the rod end could just use a single lock nut and fine adjustments made with the stock bolts.

The stock bolt is not an eccentric as the bearing slips over the stud on the subframe. The only way to adjust the arm length without removing it from either the subframe or the knuckle, spinning the rod end or arm and reattaching is to use a double adjuster.

Regarding weight, the tubing is chromoly as is the double adjuster. The clamp is 6061 aluminum and the jam nut and clamp screw are both titanium. It's pretty tough to make an adjustable arm lighter than this that's as strong as we want it to be.

now I need to find a hook up on the SPL trailing arm, no one I know carries it...

They can be purchased direct from the website https://www.splparts.com/store/produ...hp?pid288.html
you can order by phone or you can order from any of our dealers SPL PRO SUSPENSION | Dealers
Many of our dealers are sponsors here on the forum.

We have plenty of these in stock.

You guys did great job on each part! Your arms are part of what made my car a class winning success at hillclimb this past weekend.

when are you going to make front arms?

We have two sets of protoypes made and sent out for testing. The design of the 370z arms is completely different than anything we've done in the past. We had prototypes made previously that were similar to the 350z design but we're now trying something new that will offer caster and camber adjustment without removing the arm from the car. I know a lot of people have been waiting for these but the redesign should be worth the wait if all goes as planned. Hopefully I will have results soon and will be able to post some pictures of the new design and move forward with production.

great news!

Fantastic!

Just put an order for the SPL rear links, got a SWEET deal too!

I would love to get those front arms when they come out. I'm pretty close if you need a test 370z :)

Spl trailing arms are in thanks to Mike at Corner3 Garage!! Hit him up for parts!!


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