need help!!! tire rubbing sawybar and frame

[Yuan826]

Hi, I just installed my MCA red series coilovers.
I got tire rubbing the sway bar and frame on the front. My car is running stock rim ,225/45/17 re71, stock height, -3 camber front. Running stock rim, should not rubbing. Anyone has same issue? any advice？
Thank you.

[Skyehigh55]

Run spacers (10mm or so) to push out that high offset the stock wheels have (+48) or fix that camber from -3 to possibly only -1.5 all around. I wouldn’t want to be running -3 camber at stock height with a +48 offset, since the wheels are sunken in enough already. That’s my $.02 why you’re running into rubbing issues but hopefully someone else can chime in more.

Your stats check out on http://www.ft86motorsports.com/wheelitfit/ so hopefully someone helps!

[maslin]

Why should it not be rubbing? Stock wheels are super high offset. You also added a taller and wider tire, -3* of camber and lowered it an inch +. That's not stock height, not even close.

Of course its rubbing.

Take some camber out, raise the car up, get wheels with proper offset or get smaller tires. Lots of options.

[Yuan826]

I run -3 camber because this car is mostly track use. I am new on track, so I start 225 to practice. I am afraid of even I get small ET( like 35) wheel, still has rubbing issue. same distance between wheel and frame.

[maslin]

You’ve neglected to include any lowering in that calculation, as well as camber.

A 225/45 is taller than a 245/40.

It’s clearly rubbing. You have a taller tire on a very high offset wheel, with a lot of camber a bit of a drop. One or more of those is going to have to give.

[wparsons]

Originally Posted by maslin

You’ve neglected to include any lowering in that calculation, as well as camber.

A 225/45 is taller than a 245/40.

It’s clearly rubbing. You have a taller tire on a very high offset wheel, with a lot of camber a bit of a drop. One or more of those is going to have to give.

I wouldn't be so sure... my winter setup is 205/50/17 on stock wheels, lowered about 1.5" on KW V3's with -3.2* of camber up front and -2.5* in the rear. No rubbing anywhere. No spacers.



Now, all my camber is added at the knuckle, so the geometry is slightly different and my snows are 20mm narrower (probably more actually since performance tires run wider than the numbers suggest). Not sure if the OP is running camber plates or how they got to -3*.

[Icecreamtruk]

Just dont put 245 wide tires on 8" wheels unless regulations restrict wheel size. Either get wider wheels or run narrower tire. 245 on 8" feels like driving a boat, so much tire mouvement on the wheel unless you have something with very stiff sidewalls (aka Hoosiers).

[Leonardo]

Originally Posted by Icecreamtruk

Just dont put 245 wide tires on 8" wheels unless regulations restrict wheel size. Either get wider wheels or run narrower tire. 245 on 8" feels like driving a boat, so much tire mouvement on the wheel unless you have something with very stiff sidewalls (aka Hoosiers).

I agree. I had 245's on 8" wheels. My car drove like a "boat". So, I got 9" wheels and swapped the same tires on them. My car felt great to drive.


OP, posted two identical threads, I guess I chose the wrong one yesterday...
https://www.ft86club.com/forums/showthread.php?t=135991

[churchx]

wparsons: you are not dialing less camber for winter? Tires loose grip in winter way before much sidewall flex happens to need lot of static camber to compensate with. I did drove initially in winter with similar track alignment too, but in later winters usually reduced camber to ~ -1 for better contact patch, alternating between winter & summer alignments each year in autumn & spring along tire/wheel switch.

[Jordanwolf]

@Yuan826

New to track.. why wouldn't you just drive the car stock, then move to coilovers and different tires... or even just tires(which so many people would recommend first)? This confuses me greatly. Especially with the fact that your car is primarily for the track, I feel one of the first concerns and points of research should be for clearance and/or rubbing.

Everyone makes mistakes, but don't jump the gun, as it sounds like you have.

[wparsons]

Originally Posted by churchx

wparsons: you are not dialing less camber for winter? Tires loose grip in winter way before much sidewall flex happens to need lot of static camber to compensate with. I did drove initially in winter with similar track alignment too, but in later winters usually reduced camber to ~ -1 for better contact patch, alternating between winter & summer alignments each year in autumn & spring along tire/wheel switch.

Nope, haven't bothered in years. It's a little twitchy on snow covered roads under power, but far from dangerous. You can see the outer sidewall slightly flexed on my snows, and the full width of the tread is on the road (which you can't see on the summer tires).

Would it be more ideal with closer to factory alignment all around, probably. Have I had any issues at all with it, nope. I've had a couple panic moments where people ran red lights or stop signs and have been able to brake and steer around them.

I run proper snow/ice tires, not performance snows, despite there only being any accumulation of snow on the main roads like 5-6 times all winter.

[churchx]

Oh. For just daily driving on proper winter tires it was ok for me too with track alignment one winter. It's ice tracks, i'm trying to scrape all possible grip for out of still street legal studded tires without resorting to use rally studded tires, so i don't leave out dialing alignment too.

[wparsons]

Originally Posted by churchx

Oh. For just daily driving on proper winter tires it was ok for me too with track alignment one winter. It's ice tracks, i'm trying to scrape all possible grip for out of still street legal studded tires without resorting to use rally studded tires, so i don't leave out dialing alignment too.

The only ice racing around me is wheel to wheel and too much contact for a street car, I'd love it if there was some open lapping type stuff on an ice track somewhere nearby.

[Icecreamtruk]

Originally Posted by wparsons

The only ice racing around me is wheel to wheel and too much contact for a street car, I'd love it if there was some open lapping type stuff on an ice track somewhere nearby.

Maybe a bit far for you, but at Icar (Mirabel, Quebec), they have such days. Its like a lapping day, but on a frozen (prepared track, with proper ice depth and surface to have a semblance of grip). I sadly dont drive a RWD car on the winter anymore (working on something atm, I really miss RWD and snow), but they still hold such days at least twice or 3 times every winter, depends if you want to travel a couple of hours, just to slide on ice a couple more hours.

My last winter with the FRS was something like this (actually me on my car there, my GF was actually sleeping on the passanger seat right there):