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

[kch]

Would there be any negative repercussions to adding a little extra front camber at a track day?

Initial DD alignment was:
-1.7* camber front
-2.2* camber rear (no LCAs yet)
-7.2* caster front
0.6* toe out in front
0.0 toe rear

My understanding is that if I add 1* of front camber, I'll probably be closer to neutral toe on the fronts. Is this a terrible idea?

[Uplink]

Originally Posted by kch

Would there be any negative repercussions to adding a little extra front camber at a track day?

Initial DD alignment was:
-1.7* camber front
-2.2* camber rear (no LCAs yet)
-7.2* caster front
0.6* toe out in front
0.0 toe rear

My understanding is that if I add 1* of front camber, I'll probably be closer to neutral toe on the fronts. Is this a terrible idea?

What are your tires telling you with regards to camber? Are you rolling over to/past the shoulder wear indicators currently? If not it might not be entirely necessary to adjust the camber.

The more you go towards neutral/toe-in the more stable the car will behave (as far as wandering) but will be a little less responsive on turn-in. You'd be headed in the more predictable/safer direction so it's not a terrible idea. If you were going the other way it would make the car more twitchy.

[kch]

Originally Posted by Uplink

What are your tires telling you with regards to camber? Are you rolling over to/past the shoulder wear indicators currently? If not it might not be entirely necessary to adjust the camber.

The more you go towards neutral/toe-in the more stable the car will behave (as far as wandering) but will be a little less responsive on turn-in. You'd be headed in the more predictable/safer direction so it's not a terrible idea. If you were going the other way it would make the car more twitchy.

See pic. These tires were on the front when the shoulder wear happened. Edit: tire temps were higher on the outside shoulder, too, but I don't remember by how much.

[CSG Mike]

Originally Posted by jjaisli

Thanks both--appreciate the input. That was basically my attitude from the beginning and my local shop was telling me (more or less) "Heat cycling? Nah, don't worry about it. Just take it easy the first session and then let them cool down." But then I started talking to more people and the more I heard, the more my head started spinning.

Last season I was running Eibach springs so I had maybe -1.1 of front camber, which isn't a lot but I was on street tires. It wasn't enough and I was definitely rolling over in the corners.




You can't tell in that picture but I still had significant tread on the insides. I was going to go for camber bolts and adjustable rear control arms, which I did, but I also ended up with Bilstein B16s. I'll have it corner balanced in about 2 weeks time. My shop is suggesting -2.3 front and -1.7 rear to start and are looking for feedback from my first event to adjust accordingly. (They run -3.0/-2.0 on their shop BRZ for track events.) My FRS isn't my daily but it's still a street driven car. And I don't want to take giant steps or turn it into something impossibly awkward driving to and from the track.

Oh, and I'm going to be running the RA1 on 17x9 RPF1s. It's going to be a big adjustment for me this year. My Star Specs were 215s. I thought about R888s but it was my shop that suggested the RA1s instead. They said it would last longer and the performance would be more consistent over it's life span. And they're usable on a damp track where the R888s get a bit dangerous.

Sounds like your shop has a pretty good idea of what they're doing. I agree with everything except for the camber; I'd go higher than -2.3/-1.7. They're worried about your tire life, but you've already destroyed a set of tires by not having enough camber, so I wouldn't worry about going a little higher than you possibly need, especially with softer spring rates.

[strat61caster]

Originally Posted by kch

Would there be any negative repercussions to adding a little extra front camber at a track day?

Initial DD alignment was:
-1.7* camber front
-2.2* camber rear (no LCAs yet)
-7.2* caster front
0.6* toe out in front
0.0 toe rear

My understanding is that if I add 1* of front camber, I'll probably be closer to neutral toe on the fronts. Is this a terrible idea?

No, I was maxing my camber plates full negative for HPDE and full positive for DD to and from the event and going to work the next day. My Z2's have >15k miles on them.

[86Tony]

hey csg mike which woould you prefer kw cclubsports vs eibach R2 car will see lots of track days

[DocWalt]

For anyone that's used RE-71Rs on track, what sort of tire pressures are you aiming for?

[ScionOfHorus]

Originally Posted by DocWalt

For anyone that's used RE-71Rs on track, what sort of tire pressures are you aiming for?

I put mine at 28 cold, which was 34 hot. Couldn't be arsed to play with pressure so I ran with that all day

[DocWalt]

Originally Posted by ScionOfHorus

I put mine at 28 cold, which was 34 hot. Couldn't be arsed to play with pressure so I ran with that all day

Haha. I set my stock tires to 31 cold (something like 34-36 hot, though I never had the chance to check them immediately after coming off track) and never played with them again all weekend last time at the track. Pretty much perfect tire rollover too with no chunking or other strange wear.

I'm expecting the RE-71Rs to respond well to lower pressures, based on what people are setting them at for autocross. Obviously track day stuff puts more heat into tires for a longer time, which lead to my question.

[ZionsWrath]

Ended up order so AD08R

I wanted to try 71r but seems above my level and more for time trial

Would have been happy with re11a but not available

AD08R closest to what I need I think

any opinions feel free

[ZionsWrath]

Originally Posted by Uplink

I daily the car and have been extremely happy with the Direzzas. Great grip and feedback and break away progressively. The RE71R's have better peak performance characteristics at the expense of usable life.
Never ran the XS on the FR-s, only on my Vette (600lbs heavier). They were fantastic, but much like the RE71R's have a markedly shorter lifespan than the Direzzas.


Who is this magic man?

The event is only 1 day, Sunday. Saturday night is just early tech if you don't want to be at the track at 7am. If you get put on the waitlist (some run groups are almost full), PM me your info and I'll see what I can do.

Tried to register but seemed I miss the deadline by 2 days.

I guess my car isn't prepped for the season anyway. Need alignment. Oil changes. tires.

I signed up for friday the 15 at NJMP with NASA. Unfortunately I have to work the weekend so I cant do the 3 days. Also ordered some oil, AD08r and working on getting alignment. And hopefully fix my AC

You gonna be there next weekend?

[CSG Mike]

Originally Posted by DocWalt

For anyone that's used RE-71Rs on track, what sort of tire pressures are you aiming for?

I recommend you set pressure by pyrometer.

I've seen the tires run successfully anywhere from 28 to 38 psi. Without knowing your exact setup, I'd say try to aim for 34-35 hot.

[DocWalt]

Originally Posted by CSG Mike

I recommend you set pressure by pyrometer.

I've seen the tires run successfully anywhere from 28 to 38 psi. Without knowing your exact setup, I'd say try to aim for 34-35 hot.

Kinda figured that's what it would come down to.

Also figured I'd aim for that range of pressures hot and go from there.

[Superstar]

Anyone have experience with running an aftermarket front grill (such as grillcraft) with an oil cooler? Could you share some temp data (with and w/out grill) if possible?