MCA Suspension "Traction Mod"

[Calum]

It mostly just makes the rear more predictable IMO

[JohnH]

Originally Posted by Xed32

Getting a track alignment was one of the first things I did. The factory alignment was dangerous for my driving style. So much over-steer on off camber corners that some off-ramps terrified me. Thought it was something to do with falkens I had on my '16 brz or damage or something and got that stock aligned 3 times by different shops who told me it was fine. When I got the '20 brz and did more research I found it was that terrible factory alignment. Wen to 0 toe in front, slight toe in at rear, slightly less camber in the back and maxed out the 16mm camber bolts at the front. Car drives wonderfully now. Moving to the top hats and the traction mod are just extra enhancements to get it dialed as this car needs lots of front camber and the angle of the trailing arm is too severe for a true rear wheel sports car ( its an impreza part). Sliding the back out all the time isn't fun to me no matter how Toyota & Subaru describe it.

This is pretty much what I did, and why I did it, and I am also happy with how it turned out.

[jeepmor]

Oh man, now I'm chomping at the bit to get these put on. The extra power boost provides in these cars makes the stock setup a lot more twitchy.

I see less toe and more camber alignment notes. Anyone have any numbers to share? I have camber bolts up front already, and rear LCA arms and this MCA mod sitting on the bench. I'm taking notes on all this but don't have any numbers to go on.

Is there a thread on alignments and the numbers that I've missed. I have looked, but only find the more here, less there commentary. I don't mean to detract from the thread, but do see how it all ties together as a package for handling, not just bolt on magic.

[RToyo86]

Originally Posted by jeepmor

Oh man, now I'm chomping at the bit to get these put on. The extra power boost provides in these cars makes the stock setup a lot more twitchy.

I see less toe and more camber alignment notes. Anyone have any numbers to share? I have camber bolts up front already, and rear LCA arms and this MCA mod sitting on the bench. I'm taking notes on all this but don't have any numbers to go on.

Is there a thread on alignments and the numbers that I've missed. I have looked, but only find the more here, less there commentary. I don't mean to detract from the thread, but do see how it all ties together as a package for handling, not just bolt on magic.

I recall my current settings being around 0.5-1mm toe out front and 1-1.5mm toe in rear.
My last alignment was done trackside at a shop run at the facility. I sort of just let the guy do what he wanted after giving him some guidelines on the car being daily etc.
Took the car out and made 3 separate adjustments to fine tune it.

I've also tried 0 toe front 1.5mm[1/16] toe rear, 3mm toe in rear[this was a misunderstanding via tech], 0 toe front and 0 toe rear.
I like having around 1.5mm toe in rear, and 0 toe front or touch of toe out.
If you want the front end more stable on highways stick with 0 toe front.

[jeepmor]

This is the MCA traction mod thread, I won't hijack this off course with any more alignment questions. Thanks for input, but I'll do some reading and start a new thread on alignments if I have more questions.

[Wangspeed]

Just wanted to followup on this thread. I tried getting the MCA traction mod, only to find out they were backordered, and shipping from Australia costs a ton. I ended up find the GP Sports traction mod due to this thread. It's unique due to the way it reinforces the subframe bushing, and includes a rear subframe bushing as well.


I really liked this mod more than I thought I would. Highly recommended. The rear suspension feels more compliant, with the same springs.

[makinen]

Originally Posted by Wangspeed

I really liked this mod more than I thought I would. Highly recommended. The rear suspension feels more compliant, with the same springs.

Have you noticed rear ride height changes?
Some reviews that I found in minkara told that rear springs should be changed to the strong ones.

[Wangspeed]

Originally Posted by makinen

Have you noticed rear ride height changes?
Some reviews that I found in minkara told that rear springs should be changed to the strong ones.

No ride height change for me, but I'm also on pretty strong springs at 400F/400R.

[MConte05]

GKTech has released something similar, at an extremely good price point.



https://us.gktech.com/fr-s-gr86-brz-...-mod-arm-combo

[norcalpb]

Originally Posted by makinen

Have you noticed rear ride height changes?
Some reviews that I found in minkara told that rear springs should be changed to the strong ones.

Did you read that this piece may lower rear ride height?

Originally Posted by MConte05

GKTech has released something similar, at an extremely good price point.



https://us.gktech.com/fr-s-gr86-brz-...-mod-arm-combo

This is very cool! My only concern would be the survivability of those heim joints.

[Wangspeed]

Originally Posted by MConte05

GKTech has released something similar, at an extremely good price point.



https://us.gktech.com/fr-s-gr86-brz-...-mod-arm-combo

I investigated that one. I don't like the direction that they mounted the spherical bearing at the subframe. It's going to max on alignment, which is really bad. Even in the pictures on their site, at full droop, you can see it either maxed or near max.

[makinen]

Originally Posted by norcalpb

Did you read that this piece may lower rear ride height?

Yes, several reviews mentioned.

https://ameblo.jp/naughty-bear/entry-12371533584.html

https://minkara.carview.co.jp/userid...2485/note.aspx

[norcalpb]

Originally Posted by makinen

Yes, several reviews mentioned.

https://ameblo.jp/naughty-bear/entry-12371533584.html

https://minkara.carview.co.jp/userid...2485/note.aspx

Dang it, this was my largest fear with this kind of mod as I just got a relatively expensive alignment done.

[NoHaveMSG]

Originally Posted by norcalpb

Dang it, this was my largest fear with this kind of mod as I just got a relatively expensive alignment done.

Shouldn’t effect ride height. You are just changing the pickup point for the trailing arm. It may require slightly stiffer spring rate. MCA even states there's doesn't effect alignment.