MCA Suspension "Traction Mod"

[Tokay444]

Originally Posted by DocWalt

What?

I've used snow tires plenty on much more aggressive alignments, that's not the issue.

Clearly it’s a large part of the issue. If he’s not changing to a softer spring, he’s never going to generate enough roll to flatten the tire out at those settings. Faster rebound doesn’t negate how hard the spring is at all. Neither does softer compression.

[DocWalt]

Originally Posted by Tokay444

Clearly it’s a large part of the issue. If he’s not changing to a softer spring, he’s never going to generate enough roll to flatten the tire out at those settings. Faster rebound doesn’t negate how hard the spring is at all. Neither does softer compression.

I'm just going to have to disagree with you and leave it at that.

[Tokay444]

Originally Posted by DocWalt

I'm just going to have to disagree with you and leave it at that.

Even with a 235 on an 18” wheel, huh?
You do you I guess.
Op, I’d start at your alignment. It’s the easiest thing to change.

[Tatsu333]

Originally Posted by StraightOuttaCanadaEh

I'm on 18x8.5. There is a bit of stretch in the sidewall. Yeah and having driven on super gummy tires, I gotta be honest it just doesn't even feel like an 86 anymore lol. Reason I'm suspecting the car and not the tires is that apart from the coilovers, I also have both of the whiteline diff inserts (outrigger and the other one) and subframe inserts as well. So there is no slack, which makes me theorize that maybe by moving the suspension pick up point, I will introduce slack that might help with grip

Originally Posted by DocWalt

What?

I've used snow tires plenty on much more aggressive alignments, that's not the issue.

Because the traction mod reducing anti-squat loads the rears more progressively under power, you very well may find that it does help with your winter traction issues.

I definitely found that it greatly improved the ability to put down (stock) power in the wet and the little bit of snow/slush/ice we get around here in the winter.

I agree with DocWalt that your camber is most likely not the issue. It helps in the dry because it helps keep the tire from rolling over onto the sidewall when cornering hard with lots of lateral load / roll angle, but there's not enough of that going on to pull contact patch off of the tire tread in winter unless you're WAY over-driving for the structure of the tires (especially the softer sidewalls most winter tires have). The contact patch is the same size regardless, and -2.1 degrees in the rear isn't enough to pull a measurable amount of that inward off of the tire tread to the inside sidewalls to compromise traction.

FWIW, I'm on RCE SS1's (damping set as recommended for street use), lowered about 30mm front and rear, my rear camber and toe are pretty much identical to yours, and I also run Michelin X-Ice snows in the winter (though in 225/45R17 on the stock Sport Tech RS / Performance Pack 17x7.5's). As long as I'm reasonable with my right foot, no problems with traction, though the traction / stability control definitely works overtime on ice / slush. They're OK in the dry, but definitely squishier / squirmier than my same-sized Pirelli P Zero All-Seasons I run the rest of the year.

[StraightOuttaCanadaEh]

Thanks, that's very useful. I've been wanting to do the mod anyway, so I'll do it and see if it helps. I have noticed the traction control light lighting up even when coming off the off-ramp at a brisk pace. So a very gradual turn in, not even a 90 degree turn

[DocWalt]

Originally Posted by Tokay444

Even with a 235 on an 18” wheel, huh?
You do you I guess.
Op, I’d start at your alignment. It’s the easiest thing to change.

235 snow tire on an 18x8.5" wheel is not ideal. I doubt the alignment magically fixes the power down.

Snow tires are *terrible* about putting power down on dry roads, in my experience, and I've tested with 100% stock and lowered on coilovers with diff & subframe bushings with a more aggressive alignment. It was bad either way, especially when the tires died.

[Tokay444]

I have winter and summer alignments. You all should.

[marco_mc22]

Originally Posted by Tokay444

I have winter and summer alignments. You all should.

Totally agree…

[Tokay444]

Originally Posted by marco_mc22

Totally agree…

Heck, I have different alignments for different tracks.

[ZDan]

Meh, I never had issues in the snow running track alignment (-3.3 front/-2.8 rear camber, zero toe all around) on winter tires in snow. I sometimes reduce front down to -2.5 cuz easy to do but sometimes don’t bother. Interestingly never got much asymmetric wear on my winter tires.

[Ultramaroon]

Yay, Santa!

[Chris Edwards]

Anyone know where I can get a pair of the MCA brackets?

[whataboutbob]

https://mcasuspension.com/traction-m...-gr86-brz-all/

Originally Posted by Chris Edwards

Anyone know where I can get a pair of the MCA brackets?

[rande]

Originally Posted by whataboutbob

https://mcasuspension.com/traction-m...-gr86-brz-all/

Out of stock.