Suspension Review: Race Comp Yellow Springs

[JoeBoxer]

What size are your wheels and tires? I have some Tein H Techs waiting to be installed but I'm thinking I want these instead.

[S2kphile]

Originally Posted by JoeBoxer

What size are your wheels and tires? I have some Tein H Techs waiting to be installed but I'm thinking I want these instead.

http://www.ft86club.com/forums/showthread.php?t=10244

Size: 17x7.5
Offset: 42mm
Backspacing: 5.82"
Bolt Pattern: 5-100
Rec. Tire Size: 225/45-17
Weight: 16.4lbs.
Finish: Matte Grey
Construction: 1 Pc. Cast
Finish Warranty: 1 Year
Manufactured in China

[ultra]

Two questions:

- Why didn't you go for more front camber?

- Why the clunking? Your install looks just fine so that worries me. I was hoping that the Com-Cs would be a pretty robust, clunk-free solution.

Oh, and thanks a ton for the excellent post. Looking forward to your driving impressions.

[*KID*]

on the com-c...question on that. are they rubber based, where the mount sits on the spring? if its solid, it could be the cause of the clunking. I think... Ive had several issues with solid mounts.

[Draco-REX]

Originally Posted by *KID*

on the com-c...question on that. are they rubber based, where the mount sits on the spring? if its solid, it could be the cause of the clunking. I think... Ive had several issues with solid mounts.

The interface between the tophat and the upper spring perch is the same as stock. I think the OP should double-check the top nuts, as mine isn't clunking. Granted it's only been about 75-100 miles.

[Phaedrus29]

Originally Posted by mechaghost

I had it installed at Tru-line Bellevue in WA. Byron the owner is a champ, he even leant me his B Series Mazda truck when the car was needed overnight. He also did the alignment, unfortunately no corner balancing as the car setup wont be able to do this. He is a top rated alignment specialist here in WA, and regularly does alignment on high end cars and track use cars.

How many hours did the install take at the shop? Thanks.

[*KID*]

Originally Posted by Draco-REX

The interface between the tophat and the upper spring perch is the same as stock. I think the OP should double-check the top nuts, as mine isn't clunking. Granted it's only been about 75-100 miles.

yup, Ive had that issue too where the top hat nut is not properly tighten. Could be that then

[mechaghost]

Update on the Popping Issue: It is more of a popping sound that a clunking sound. This happens when I have the wheels more than 40% turned. It's not loud but is definitely noticable by me. None of the instructors noticed it though when I was driving, or maybe they thought it was a normal sound to hear and never pointed it out.


I just did a Skills Day with the Porsche Club here in Seattle. The car handled even better with the RCE Springs and the alignment.

Slalom: The car felt more settled and was better at keeping the backend in check. It allowed me to go faster through it.

Skid Pad: I was less prone to understeering and oversteering. It needed more gas to get the tail end loose.

Handling Oval: Tires were definitely the weak point as I am still on the Stock Tires. Entering the corners with heavy braking is good, but you still need to feather very lightly the gas as you unwind the corner. Also having too much speed on the turn causes understeer. (This was the case even before the suspension upgrade)

AutoX: People were saying I was staying flatter than the other Stock BRZ doing the course today.

DD Ride Comfort: I did not feel any difference with the Stock Springs


Truline quoted me a price and not by the hour. They did keep the car overnight though.

For the Camber, I'm not the suspension expert, truline are the suspension experts and that is what they said would be reasonable compromise for a DD and AutoX.

[mechaghost]

Top nuts are secure. The car is handling perfectly so I need to figure out what is causing it. Tuesday will bring answers when I bring the car in

[mechaghost]

I had my gf turn the wheels for me while I look at it. The popping is coming from the Top Mounts

[Racecomp Engineering]

Make sure the springs are properly seated. They definitely shouldn't make any noise.

[mechaghost]

Originally Posted by Racecomp Engineering

Make sure the springs are properly seated. They definitely shouldn't make any noise.

they look properly seated... i raised the car and turned the steering while the wheels were off the ground and same popping noise.

have you guys heard of the same issues with other installs?

[r4m3n]

Gonna get my RCE springs installed this Wednesday. Looking forward to it...hope the popping sound isn't an issue.

BTW, i'm in Seattle for PAX...

[Draco-REX]

Originally Posted by mechaghost

they look properly seated... i raised the car and turned the steering while the wheels were off the ground and same popping noise.

have you guys heard of the same issues with other installs?

While someone turns the wheel, check to make sure the nuts in the tophats are turning. Also, again while someone is turning the wheel, look at the upper spring perches and see if they are turning also.