MCA Suspension "Traction Mod"

[86prime]

Thank goodness for this thread. I just installed MCA traction mod II, STi rear trailing arms, and Whiteline KDT922 bushings, and the car feels great!

[Kamber]

Does anyone here that did the MCA Traction Mod V2 + STi trailing arms have a list of part numbers handy for any "while-you're-there" replacement hardware/nuts/bolts? Planning on doing these on a new-to-me 2013 FR-S and I'm guessing it could probably use some new hardware since it was a daily for most of its life being converted to a track car. Also, does anyone know if the STi trailing arms compatible with 2nd gen cars as well? Thanks in advanced!

Edit: Found some answers as far as part numbers, details below:

SU00302819 F/bolt-PLT M12 x4
SU00305235 Self Lock Nut M12 x4
SU00300013 Bolt x2 (bolt that holds the bracket cable bracket)
SU00300544 BRKT Cable Guard RH
SU00300545 BRKT Cable Guard LH

TQ Specs
Subframe bolt 145 nm / 106 ft-lbs
Trailing arm bolts 110nm / 81 ft-lbs
19mm MCA bolt 110nm / 81 ft-lbs

[Ohio Enthusiast]

Originally Posted by Kamber

SU00300544 BRKT Cable Guard RH
SU00300545 BRKT Cable Guard LH

You don't need the parking brake cable guards - the traction mod moving the control arm down makes them rub against the cable. I run without the guards.

[Tatsu333]

Originally Posted by Ohio Enthusiast

You don't need the parking brake cable guards - the traction mod moving the control arm down makes them rub against the cable. I run without the guards.

Me too - no guards (as per the install instructions from MCA), though I have thought about putting them back on and just bending them for more clearance...

[Xed32]

Oooh. Thats what those are....I should remove them. Was wondering what those bent up dangly things were on the trailing arm.

[autoracer86]

I bought new ones and ended up removing them as I didn’t love how the cable was pressing against them. Waste of money in the end.

[norcalpb]

Originally Posted by autoracer86

I bought new ones and ended up removing them as I didn’t love how the cable was pressing against them. Waste of money in the end.

I love how none of us knew we didn’t need that, I say we all combine ours to make a mini statue or something

[StraightOuttaCanadaEh]

Anyone know if these help with winter traction? I have snow tires on, RCE T2 coils, rebound set to softest setting as well, and this shit is like it's on skates with no snow outside. Maybe having more squat in the rear will help

[ZDan]

Originally Posted by StraightOuttaCanadaEh

Anyone know if these help with winter traction? I have snow tires on, RCE T2 coils, rebound set to softest setting as well, and this shit is like it's on skates with no snow outside. Maybe having more squat in the rear will help

Sounds like a tire issue to me, I don't think any ant-squat geometry will help you if there is so little grip. What specific make/model snow tires?

[StraightOuttaCanadaEh]

Originally Posted by ZDan

Sounds like a tire issue to me, I don't think any ant-squat geometry will help you if there is so little grip. What specific make/model snow tires?

Michelin X-ice Snow (not to be confused with X-ice xi3). They're rated better than the xi3 ... maybe not cold enough? Pavement was dry but it was dark so hard to see if maybe there was frozen dew or something

[ZDan]

Originally Posted by StraightOuttaCanadaEh

Michelin X-ice Snow (not to be confused with X-ice xi3). They're rated better than the xi3 ... maybe not cold enough? Pavement was dry but it was dark so hard to see if maybe there was frozen dew or something

I’ve had mixed results with dedicated Winter/snow tires. Either they have great snow grip with poor wet/dry grip, or vice versa. Usually go with “Performance Winter” category as in Rhode Island winters are usually not huge amounts of snow.

[RToyo86]

What is your alignment like?

I tried out continental Icecontacts this year and they handle dry roads quite well. The Michelins shouldn't handle terrible

[StraightOuttaCanadaEh]

Originally Posted by RToyo86

What is your alignment like?

I tried out continental Icecontacts this year and they handle dry roads quite well. The Michelins shouldn't handle terrible

Camber -3.1 front, -2.0 rear
Toe 0 front, 0.01 rear

I mean I bought the michelins knowing I was gonna sacrifice some snow traction for dry weather handling resembling something sporty. Just wondering if any of that would be due to the car being on aftermarket suspension, and whether the traction mod would help

[ZDan]

Originally Posted by StraightOuttaCanadaEh

Camber -3.1 front, -2.0 rear
Toe 0 front, 0.01 rear

I mean I bought the michelins knowing I was gonna sacrifice some snow traction for dry weather handling resembling something sporty. Just wondering if any of that would be due to the car being on aftermarket suspension, and whether the traction mod would help

No amount of suspension mod will give you more grip. Surprising that the Michelins are that bad, but then again the one time I've had traction issues it was down to Michelin tires going "off", to an *alarming* degree. If you are having grip issues with no snow and in dry conditions, your tires suck, bad.