Suspension Review: Race Comp Yellow Springs

[Racecomp Engineering]

Yes, PM us with some details.

[Smudgeous]

As a few people have posted problems with the lowering spring + Whiteline Com-C strut tops making popping sounds, I wanted to post a bit of an update of my own situation. I gave Whiteline US a call on Monday and got ahold of Jan, who asked me to email him a blurb of the problems I'm having and a copy of the sales invoice. Looks like they're going to be mailing me a new set, and will attempt to diagnose the ones I ship back to see what the problem was.

[Racecomp Engineering]

Instructions:
http://www.racecompengineering.com/i...s-instructions


If you have noise, please double check your install to make sure you got the bumpstops and dust boots right.

- Andrew

[ATL BRZ]

Why aren't spring compressors used in the disassembly instructions for the rear?

[JoeBoxer]

Originally Posted by Racecomp Engineering

Instructions:
http://www.racecompengineering.com/i...s-instructions


If you have noise, please double check your install to make sure you got the bumpstops and dust boots right.

- Andrew

Excellent work I have technicians to do mine but with those instructions i feel like i could do it myself.

[Racecomp Engineering]

Originally Posted by ATL BRZ

Why aren't spring compressors used in the disassembly instructions for the rear?

For the rear it is not needed because there is very little preload on the springs. Definitely be careful but it is easy with help from a friend.

- Andrew

[wrxneffect]

Originally Posted by Racecomp Engineering

Instructions:
http://www.racecompengineering.com/i...s-instructions


If you have noise, please double check your install to make sure you got the bumpstops and dust boots right.

- Andrew

Good write up. Is there a reason why you state on the last page to torque the lug nuts to 65.7 ft-lbs and not 89 ft-lbs? I thought the specified torque spec for the lug nuts on the brz is 89 ft-lbs. 65.7 ft-lbs is the wrx spec, correct?

[Coastermikey]

Originally Posted by Racecomp Engineering

Instructions:
http://www.racecompengineering.com/i...s-instructions


If you have noise, please double check your install to make sure you got the bumpstops and dust boots right.

- Andrew

that car looks so familiar

[jamal]

And what's up with "swingarm?"

But as far as wheel nut torque goes I don't see a problem with wrx specs. The hubs, lugs, nuts, taper, wheel offset etc are all the same. I think it's kind of odd that they would change it to almost 90-lb ft. But anyhow I usually go for around 85 and consider it more important to use a torque wrench and get them even than the actual number, assuming it's in the right ballpark.

Also, if you don't know how to properly torque lug nuts you probably shouldn't be installing your own springs.

[schtebie]

Shouldn't the wheel lug nut torque be 89 lb-ft?

[Racecomp Engineering]

Originally Posted by jamal

And what's up with "swingarm?"

But as far as wheel nut torque goes I don't see a problem with wrx specs. The hubs, lugs, nuts, taper, wheel offset etc are all the same. I think it's kind of odd that they would change it to almost 90-lb ft. But anyhow I usually go for around 85 and consider it more important to use a torque wrench and get them even than the actual number, assuming it's in the right ballpark.

Also, if you don't know how to properly torque lug nuts you probably shouldn't be installing your own springs.

Right, we used the WRX specs. The important part is to keep it even and use a torque wrench like Jamal said.

As for "swingarm"....I have no clue why Dan wrote that instead of lower control arm.

- Andrew

[ATL BRZ]

Just finished installing my RCE starter pack minus the rear camber adjustment kit (looked menacing to get the stock bushings out of the rear upper control arms, didn't even attempt).

I am hearing loud popping/rattling when driving over bumps from the Whiteline top mounts. I installed the springs and reassembled the struts exactly as the instructions were written. Torque specs on all bolts are good. Bump stops and dust covers are correct. I'm willing to bet that swapping the stock top mounts back on will get rid of the noise. It sounds like metal on metal almost like something is loose but I'm certain that everything is tight. Will be calling Myles tomorrow :confused:

[SWPBRZ415]

Originally Posted by ATL BRZ

Just finished installing my RCE starter pack minus the rear camber adjustment kit (looked menacing to get the stock bushings out of the rear upper control arms, didn't even attempt).

I am hearing loud popping when driving over bumps from the Whiteline top mounts. I installed the springs and reassembled the struts exactly as the instructions were written. Torque specs on all bolts are good. Bump stops and dust covers are correct. I'm willing to bet that swapping the stock top mounts back on will get rid of the noise. It sounds like metal on metal almost like something is loose but I'm certain that everything is tight. Will be calling Myles tomorrow :confused:

Do you hear popping when you are turning?

[r4m3n]

Regardless, gonna need to take it back to @Evasive Motorsports again and see what's up. This time I'll be sure to bring along the printed manual and have them walk through what they did in detail on the install.