Got a track related question? I'll try to answer.

[CSG Mike]

Originally Posted by ddeflyer

On the stock suspension (stock ride height, springs, dampers, etc), how far can we compress the suspension before we are on the bump stops and start having issues? Put another way, how many lateral Gs can the car sustain before the stock suspension is overwhelmed?

That's kinda situation dependent.

E.g., on an oval, you can be riding the bump stop and be perfectly okay...

[D K]

How much slower is an FRS. Around streets of willow without a wing??

[enivid]

On the track prep thread, it says to not brake hard enough to engage ABS. If there is no brake fade, what other reason is there not to use ABS?

[gramicci101]

ABS will be slower. If you can hold the brakes just below the point of engaging ABS, you will be using as much of the tire's traction as possible to slow the car down and the brake pads will be a steady pressure on the rotors. You're basically at the maximum effective braking ability of the car.

If you brake hard enough to engage ABS, it will pulse the brakes, repeatedly locking them up and releasing them. It isn't smooth and could upset the car if you're in a turn. Plus since you're repeatedly losing traction, you're not slowing down as effectively as you would if you had traction the entire time. Longer braking times mean shorter acceleration times means longer lap times.

[CSG Mike]

Originally Posted by D K

How much slower is an FRS. Around streets of willow without a wing??

None

I'm still waiting on APR... and still prepping for Shawn to morrow.

[enivid]

Originally Posted by gramicci101

ABS will be slower. If you can hold the brakes just below the point of engaging ABS, you will be using as much of the tire's traction as possible to slow the car down and the brake pads will be a steady pressure on the rotors. You're basically at the maximum effective braking ability of the car.

If you brake hard enough to engage ABS, it will pulse the brakes, repeatedly locking them up and releasing them. It isn't smooth and could upset the car if you're in a turn. Plus since you're repeatedly losing traction, you're not slowing down as effectively as you would if you had traction the entire time. Longer braking times mean shorter acceleration times means longer lap times.

When I first started, I would not engage abs coming off of a straight but I was braking at the 4/3 marker. My instructors told me to use abs so now I'm braking at the one marker. So I've been using it when going 100mph+ and need to slow down.

[CSG Mike]

Originally Posted by enivid

When I first started, I would not engage abs coming off of a straight but I was braking at the 4/3 marker. My instructors told me to use abs so now I'm braking at the one marker. So I've been using it when going 100mph+ and need to slow down.

Brake a little earlier, and stop using it. You'll find that you'll scrub the speed faster, AND be more settled for the corner

[troek]

ive taken this advice and it has proven good for me. i use to just ride the abs into all the corners, now i stay out of it, if i need to brake earlier, so be it. as many people more experienced than me on here have said, and im sure mike has said once, corner exit is more important than entry. i have a nice clip of me overtaking a porsche cayman after a corner exit that demonstrates this nicely.
[ame]http://youtu.be/xGvNDPLL-CM[/ame]

[Mgrand34]

Mike this is a great thread and a terrific resource.

Thanks,

Marty Grand

[yomny]

@CSG Mike
I wanted to know what a reasonable front and rear camber would be to accomodate 9" wheels with 255 tires. What's the max I could use without really causing an extreme wear situation for daily driving. I do occasional HPDE so I know camber would benefit me.

Part two of the question- When installing rear control arm to adjust camber at what point will i NEED toe arms? At what camber setting do the rear toe arms fall short.

Thanks!

[torqdork]

Mike, would you recommend rotating tires between track days at different circuits?

If so, what pattern would you use with a square setup and non-directional asymmetric tires (Michelin PSS)?

I'm rotating rears cross to front, front straight back after a track day but am wondering if it helps at all in prep for the next event.

TIA...

[ddeflyer]

Originally Posted by CSG Mike

That's kinda situation dependent.

E.g., on an oval, you can be riding the bump stop and be perfectly okay...

So I am talking about road course use, basically I am deciding if I need to take the dive now to get some new coilovers or if I am still OK for the time being. I am seeing alot of body roll in high g corners (1-1.2Gs lateral according to data logger) which I would guess is probably reducing my grip and a major factor in the rate that I kill my tire's shoulders.

On a similar note, how do people feel about remote reservoir shocks? Good? Bad? Not worth the point cost in competition? Etc.

[CSG Mike]

Originally Posted by yomny

@CSG Mike
I wanted to know what a reasonable front and rear camber would be to accomodate 9" wheels with 255 tires. What's the max I could use without really causing an extreme wear situation for daily driving. I do occasional HPDE so I know camber would benefit me.

Part two of the question- When installing rear control arm to adjust camber at what point will i NEED toe arms? At what camber setting do the rear toe arms fall short.

Thanks!

Are you tracking 4+ times a year? Try -2.5 front -1.8 rear. It's "not enough" but we're compromising to accommodate your daily driving. 0 toe all around.

You *need* the arms when you want to be able to adjust rear camber. Otherwise you're at the mercy of your height adjustment.

[CSG Mike]

Originally Posted by torqdork

Mike, would you recommend rotating tires between track days at different circuits?

If so, what pattern would you use with a square setup and non-directional asymmetric tires (Michelin PSS)?

I'm rotating rears cross to front, front straight back after a track day but am wondering if it helps at all in prep for the next event.

TIA...

We rotate tires based on wear to maximize life, since, like everyone else here, cost is a major factor.