Dialing out oversteer (Race video on page 2)

[MisterMiniS]

Ireland Engineering 25mm. Haven't heard bad things about them, but if I'm wrong, I guess I'll find out the hard way :p

[110stx]

WAY too much rear spring. WAY too much. Even with the big bar up front.

I run 550 front/630 rear with AST 5100s, just for comparison.

IE big bar in front, stock bar in back.

[MisterMiniS]

well, with STX in your name, I am assuming you are on street tires. That makes a difference, cause I am not. AST 5100....jealous. My shocks were valved for those rates, so that helps a lot for proper control. Also, I removed the rear sway bar and that helped immensely. I have LSD, that helps a lot. Also, like I said, it is not crazy ass oversteer, so I really don't think they are that high.
I will let you all know Sunday how the big boy front sway bar helped.

[SkiFree]

If you need help with setting up the 25mm bar, let me know.

[MisterMiniS]

If you need help with setting up the 25mm bar, let me know.

Will do. Thanks for the offer.

[MisterMiniS]

Apparently IE doesn't feel the need to send anything out in a timely manner, so no sway bar for the race tomorrow. I'll still GoPro it so you can see the oversteer and my driving abilities. Or lack thereof possibly.

[SkiFree]

Did you include a note or anything in the comments section saying you needed the bar by a certain date, if not did you call or give any indication what your plans were?

Springs the busiest time of the year, but I try to get things out if I'm made aware of any specific needs.

[CO318is]

Besides the last turn around I thought your car looked really composed. I was running sound during your heat or else I would have snagged that ride today. I will see you in June.

Sent from my Galaxy Nexus using Tapatalk 2

[110stx]

well, with STX in your name, I am assuming you are on street tires. That makes a difference, cause I am not. AST 5100....jealous. My shocks were valved for those rates, so that helps a lot for proper control. Also, I removed the rear sway bar and that helped immensely. I have LSD, that helps a lot. Also, like I said, it is not crazy ass oversteer, so I really don't think they are that high.
I will let you all know Sunday how the big boy front sway bar helped.

Yeah, street tires. Meh, not as big a deal regarding basic setup, IMHO.

All these things you list are good. I get them.

I still think you have too much rear spring. Just by description, I'd expect it to be very difficult to put power down on corner exit without breaking the tail loose or unwinding the steering wheel very, very rapidly.

Everything I've learned about e30 setup suggests that a differential of 100- to 150-lb-in spring rates front to rear makes for a fairly neutral-handling car.

I'm not lecturing, just throwing out my meager data points for your assistance.

Cheers,
dh

[MisterMiniS]

Yeah, street tires. Meh, not as big a deal regarding basic setup, IMHO.

All these things you list are good. I get them.

I still think you have too much rear spring. Just by description, I'd expect it to be very difficult to put power down on corner exit without breaking the tail loose or unwinding the steering wheel very, very rapidly.

Everything I've learned about e30 setup suggests that a differential of 100- to 150-lb-in spring rates front to rear makes for a fairly neutral-handling car.

I'm not lecturing, just throwing out my meager data points for your assistance.

Cheers,
dh

I really do appreciate your feedback. So, thank you. Also, I have some video of my race today. It was a crumby day for me as I coned away my two fastest runs :( That said, you can kinda see my hands as well as the cones, so when I post it, critique away! Should be soon.

[Eric]

- spring rates are too high in the back. Either decrease rear spring, or increase front spring. I'd call jay at gc and explain your setup and problems... He's been doing bmws for a long time!
- why so much front camber? Do you NEED more than -3°?
- get an alignment, and pay attention to your rear toe measurements.
- nt05 or nt01?

[Bimmerman325i]

In DSP can you run the rear camber/toe weld-on adjusters? Might help matters.

[MisterMiniS]

- spring rates are too high in the back. Either decrease rear spring, or increase front spring. I'd call jay at gc and explain your setup and problems... He's been doing bmws for a long time!
- why so much front camber? Do you NEED more than -3°?
- get an alignment, and pay attention to your rear toe measurements.
- nt05 or nt01?

-I'll call and see what they say
-No reason, but I do enjoy the turn in
-Will do. Should I be having the rear toe set to 0?
-NT-01 (halfway done...maybe more)

[MisterMiniS]

Here you go

Critique away. This is of my best raw time. Best clean time was a second slower...sad day.

http://www.youtube.com/watch?v=8aUBH-qBXFw&feature=g-upl

[110stx]

It looked loose.

Like you were chasing the car at every corner exit.

It also sounds like you have to wait till way past apex before you can pick up the throttle again.

No real driving critiques to make except that unwinding the wheel faster on corner exit -- even anticipating the oversteer with your unwind and starting earlier and doing it faster -- might be the only thing I can imagine trying.

Your rear swaybar is disconnected, correct? If not ... And rear shocks running just a click or so above full soft?