2012 BRZ/FR-S Stock Class Autocross Discussion

[Sccabrz192]

Sounds like I will be ordering my class magnets tomorrow for next weekend

Bill, if you are in the mood for a trek the GLSS divisional event #2 is in MI next weekend, 2 days at a long, fast, albeit a little broken up, asphalt lot. It's going to be a good time!

[MTeator]

Good news.

My first attempt at an alignment for the car blew. I made it too lively. I underestimated the front grip I was able to get with the additional front camber. Any mid corner throttle just brought it around.

Gonna throw it back up on the rack today and adjust it again. I think it's going to be an amazing CS car with some development.

[Scooby South]

Originally Posted by MTeator

Good news.

My first attempt at an alignment for the car blew. I made it too lively. I underestimated the front grip I was able to get with the additional front camber. Any mid corner throttle just brought it around.

Gonna throw it back up on the rack today and adjust it again. I think it's going to be an amazing CS car with some development.

yep...know the feeling...couldn't put ANY throttle down as it wanted to just spin and spin...:LOL: heres what was suggested to me on Nasioc on my Build Thread..

Originally Posted by solo-x

Are you actually running zero rear toe on a rear drive car? If so, that's probably a LARGE part of your over steer issue. Try an 1/8" total toe in on the rear and put the rear bar back on, see if that fixes your over steer issue.

so I am going to take his adivce...since all I have known is AWD Subies... and see what happens..


Bill

[MTeator]

Originally Posted by Scooby South

yep...know the feeling...couldn't put ANY throttle down as it wanted to just spin and spin...:LOL: heres what was suggested to me on Nasioc on my Build Thread..

so I am going to take his adivce...since all I have known is AWD Subies... and see what happens..


Bill

I came from an ES MR2 which I had to beg to rotate. I'm thinking the same amount of toe in for the rear and either 0 or slight out for the front.

[Scooby South]

Originally Posted by MTeator

I came from an ES MR2 which I had to beg to rotate. I'm thinking the same amount of toe in for the rear and either 0 or slight out for the front.

I ran 0 and 0... the front end was Planted, that is with -2.4 of front camber.. and -.5 on the rear... mine was like a top..

Bill

[MTeator]

Originally Posted by Scooby South

I ran 0 and 0... the front end was Planted, that is with -2.4 of front camber.. and -.5 on the rear... mine was like a top..

Bill

I was neutral rear and I think 1/8 out in the front.

I've only got 1.3/1.4 camber in the front (just using the smaller upper bolt) and my rear is messed up (0.3/1.9)

[Kido1986]

When you say smaller upper bolt, do you mean the OEM bolts? I thought they were limited to about .75 on camber

[MTeator]

Originally Posted by Kido1986

When you say smaller upper bolt, do you mean the OEM bolts? I thought they were limited to about .75 on camber

Yes, the OEM bolts. We also loosened the top of the strut. Pushed on it real hard and torqued it all down and that's where we ended up.

[Kido1986]

Sorry for a dumb question, any safety issues with that? I want to run competitively (eventually) locally in C-stock so as much front camber is possible. I'm still learning as I've only gotten serious about suspension modding in the past year or so on my Mazda and it's on coilovers with camberplates so it's a little easier.

[MTeator]

From adjusting it in this manner? No.

[jdrxb9]

Just a quick post to agree with MT and Bill - the car is easy to get loose. I was feeling it last weekend (6/9-10), but coming from FWD 10+ years ago, I wasn't sure if I was interpreting it correctly. This weekend (6/17), I had a pretty damn good driver take a ride along or two and then a couple fun runs and he agreed the car is loose. My RWD driving still has a LONG way to go, so I don't want to chase setup too much, but I am going to put it back on the rack and dial in some rear toe in and see how that goes before I put on a front bar.

[Scooby South]

Originally Posted by jdrxb9

Just a quick post to agree with MT and Bill - the car is easy to get loose. I was feeling it last weekend (6/9-10), but coming from FWD 10+ years ago, I wasn't sure if I was interpreting it correctly. This weekend (6/17), I had a pretty damn good driver take a ride along or two and then a couple fun runs and he agreed the car is loose. My RWD driving still has a LONG way to go, so I don't want to chase setup too much, but I am going to put it back on the rack and dial in some rear toe in and see how that goes before I put on a front bar.

yeeeep...same with me


Bill

[ubersoph]

Keep in mind, my frame of reference is autocrossing Miatas (both stock and modified) for the past 3 years. Also my setup was on stock alignment and stock sways, only change was switching tires to Dunlop Star Specs.

That said, I didn't feel like the car was insanely loose. The tail end would step out, but every time it did that I could tell it was happening before it happened, felt similar to an AP2 S2000 suspension setup. I did get faster when I didn't get the car stupidly sideways all over the place, but the car felt controllable and fairly easy to drive.

I'm thinking when I do my alignment, I might keep the F/R Camber bias pretty close to whatever is stock to keep the same kind of behavior at the limit. Also thanks again Bill for hooking me up with the camber bolts

[MTeator]

Originally Posted by ubersoph

That said, I didn't feel like the car was insanely loose.

it's not, with the stock setup I just wanted "a little more loose" and way the crap overshot it.