E92 M3 ZCP in SCCA Solo F Street

[z3papa]

Originally Posted by Cashmo

To be clear, I've only had one autox so far this summer and again, any new tire would have felt great. I have no wet weather experience on them. The Goodyear specs are linked above but the 275/30-18 is 10" wide on a 9.5" wide wheel, same as the RE71r's. I THINK they put down power as well as RE71's which means they're probably not as good as the A052's. However, they're less expensive and by all accounts last longer. I believe Tony and Devin are sticking with them for Nats in the BS M2.

I'd prefer to be on the same tire so we can rule it out of our list of excuses. Last year sucked in that regard. I was just trying to avoid spending more money and having a bunch of fresh tires left over after Nats in this abbreviated year. I still have last years RE71's from Nats to use up and my work schedule isn't cooperating.
Jeff

With your bold and in as much as my new/used Porsche 718 GTS does 77 on a 285/30-19, you had my attention. I think you meant 275/35-18. I'll be testing the GY SC3 next year but am dubious if they are right on pace with the Yoks.I believe that Tony on the GY works until he gets to Lincoln fine, but Dave M. will munch this up as he has figured this out already. Don't take my word for it.

[Kelse92]

GY are not as fast as the Yoks I don’t think. (But it hasn’t really been tested) But on the Vette Jeremy tested at Lincoln last week they were .3 faster than the Bridgestones. Granted, some more rear tire compared to the Stones. But they were faster over several portions of the course.

Alternate suggestions for y’all if you want to do Yoko’s. Run 265/275 staggered Yoko’s. Or run 295 square pinched on the front.

[Tommysalami]

I'm most likely going to be running the mixed stone/yoko setup as I think they'll suit me best. Sorry to disappoint our wallets. We don't know who else is going to sign up so may as well go with what's best.

I was going to borrow a set to test at the Fontana pro but had to miss the event due to work travel unfortunately.

[Cashmo]

I understand. Are you going to go with 265 or 295 rears?

Thanks,
Jeff

[kjchristopher]

Jeff - get the Goodyears and then do TTN after Nationals to make up for all the lost events.

[Tommysalami]

Originally Posted by Cashmo

I understand. Are you going to go with 265 or 295 rears?

Thanks,
Jeff

295s

[Richbot]

heckin chomnky

[z3papa]

Originally Posted by Richbot

heckin chomnky

LOL. Had to google what that meant. On an off-topic issue, nice comment on your double at Gateway in Sportscar.

[Cashmo]

Originally Posted by kjchristopher

Jeff - get the Goodyears and then do TTN after Nationals to make up for all the lost events.

Well, I already have the GY's but looking at the rule set I think my F-Street Solo car is a little underprepared for Sport 2 Time Trials. I'm guessing it'd be hard to keep up with a prepped C5 Z06.

Sport Category is intended for daily-driven street cars on tires with a treadwear rating of 200 or higher with simple bolt-on modifications.

Modifications typically allowed in Sport:

OBD-based ECU reflashes
Most wheels
Single-adjustable fixed-perched shocks
Lowering spring kits
Direct-replacement sway bars
Cold-air intakes
Cat-back exhausts
Radiator and fluid coolers
Brake option packages and some cosmetic modifications from a different trim model of the vehicle—like swapping spoilers

[Tommysalami]

Welp, nats is cancelled. Guess I'll do a track day then.

I have a set of 4x 18x9.5 wheels. I'm looking at the Hankook RS4s. Should I do 265/35 front and 285/35 rear to make the car slightly pushy? I don't want to go to my first track day with a car that's loose.

[Kelse92]

Originally Posted by Tommysalami

Welp, nats is cancelled. Guess I'll do a track day then.

I have a set of 4x 18x9.5 wheels. I'm looking at the Hankook RS4s. Should I do 265/35 front and 285/35 rear to make the car slightly pushy? I don't want to go to my first track day with a car that's loose.

I ran a 9.5/10.5 staggered set with 265/285 RS4’s. It was good for my first several days on track with the car

[Richbot]

You will regret not rotating on a track setup IMO if you do more than one track day, and good autocrossers plow off into the weeds with a pushy setup just the same as good track drivers. There's something to be said for a quick-handed, solid car control driver being safer in a car that rotates on-demand. If you've never done a track day in one of these cars before and you're used to autocrossing it, I think you'll be amazed at how much spare time you have. It's an incredibly friendly car on track, handling wise.

Do you have any spacers you could use on the rear with the 265's to help get some grip back? The 285's will *work* up front, but they'll hit stuff. I ran RS3's up front like that on 10's for a while, on a 9.5 it ought to be just a shade less smashy? I'd stick with the square 265's though. PRetty sure the 285 RS4 is bigger than the 285 RS3 was

The uneven wear front/rear will add insult to injury on the HAnkooks which will last a really long time if you rotate.

Or get the Goodyears and let the extra stick build in some push

And the Lord said, ploweth thy track and thou shalt overcorrect, and thine fields will be sown with the salty tears and tire walls, the Way and the Light is through Me, and my Teachings to you, that thou shalt turneth right to goeth left, amen

[Richbot]

Originally Posted by z3papa

LOL. Had to google what that meant. On an off-topic issue, nice comment on your double at Gateway in Sportscar.

Heh, thanks. Now I just need Bobby to go win it all so I can be national champion by the transitive property of I Beat That Guy Once. Twas a bizzare race weekend but I put together one of the top 2 or 3 overall weekend drives of my life and can say I have done the fastest lap anyone has ever done around gateway in an SRF, for now (but it's an unofficial record, doesn't count unless it's in a race, blast!). Nice to get a little SportsCar shoutout. Nice they spelled my name right too, lol

[Tommysalami]

Originally Posted by Richbot

You will regret not rotating on a track setup IMO if you do more than one track day, and good autocrossers plow off into the weeds with a pushy setup just the same as good track drivers.

Do you have any spacers you could use on the rear with the 265's to help get some grip back? The 285's will *work* up front, but they'll hit stuff. I ran RS3's up front like that on 10's for a while, on a 9.5 it ought to be just a shade less smashy? I'd stick with the square 265's though.

Or get the Goodyears and let the extra stick build in some push

Thanks, I'll consider the square 265 setup. Those should be a better fit for 18x9.5s anyway

[PedalFaster]

Originally Posted by Tommysalami

I don't want to go to my first track day with a car that's loose.

I agree with Rich -- I actually prefer a looser setup for track work versus autocross.

In autocross, we're making a bunch of sudden inputs in close succession. In a lot of elements, you're making a single input -- if you lose the back end, odds are your run's done immediately, as you have very little time and space in which to recover.

On the other hand, on a big track, you're making slow inputs in long corners. If the back end comes out, you have time and space to catch it and keep going.

If it's literally your very first track day, building in a bit more push would be good for confidence, but you could accomplish that by cranking your front bar rather than choosing tire sizes that could hold you back later.

[Kelse92]

Originally Posted by Richbot

The uneven wear front/rear will add insult to injury on the HAnkooks which will last a really long time if you rotate.

Or get the Goodyears and let the extra stick build in some push

Hankooks last a really long time anyway lol
I had a set last year that got me 150 autocross runs at Mineral Wells, 5-6 days on track until I broke one of the wheels they were mounted on. So I dismounted them thinking the front one on the broken wheel was done-for, threw them out, and then one of my buddies pulled them out of the trash, put them on his car and has gotten like 10 more days on them. They’re chunked to oblivion on the shoulders, but they still won’t die haha

The Goodyear’s in 275 square actually though might be a better choice for similar pricing. Or hold out and do Falkens. Last I heard 275’s should be out in the next month or two and they’ll be $850 for a set according to Discount Tire.

Oh, and it’s a little more costly, but 275/35/18 RS4’s exist if ordered direct from Hankook Motorsport.

[Tommysalami]

Yeah I really like the longevity that the RS4s offer. They'll probably be a set just for track days and test and tunes to preserve my srs bzns autox set

[chono]

I've retired the E92 from autocross duty - so have wheels for sale.
My 'ugly' wheels have sold. My 'pretty' (and really light) wheels are for sale.

At the time I bought them - they were the best / lightest FStreet legal wheel:
https://www.m3post.com/forums/showthread.php?p=26582962

I'll cut a deal for someone that intends to autocross on them. And an even better deal for someone that can pick them up!

-'chono'

[Tommysalami]

The Goodyears are excellent, especially for the price with a rebate they were having. Got a set of 275/35 front with 275/40 rear to help with the shorter DCT gearing. For whatever reason, the tread surface in the 275/40 is a little narrower than on the 275/35, despite having the same sidewall width. Just a more rounded shape to it. But once mounted on the wheels, it looks like that evens out with the fronts being pinched a little.

Did well on PAX at last week's event, just shy of Yom. At the previous event I was 3 seconds in raw time behind Jeff Wong so it was nice to put some fresh tires on and not feel like I've forgotten how to drive.

The car's balance on course felt great. Overall I don't think I like their feel so much when trail braking on corner entry as they're maybe a little vague, and didn't feel like they multitask super well. Overall no major complaints though. Seemed to tolerate heat fairly well also as it was 80 and sunny, I didn't spray, and was fastest on my final run. They put power down way better than the 70-run 275/35 stones I had on previously, though I added a little rear toe in and that surely helped a little too.

I'm hoping I will be able to directly compare to the 285/295 stone/yoko combo at an event later this month. My feeling is that the mixed set will be slightly better, which goes along with what I've heard from someone who has tried both. I'm hoping these provide some extra longevity over the yokos during the off season where there aren't any national events happening.

[Kelse92]

Thanks for the review! I agree in my driving of the Goodyears on the C7 they were too vague and I wasn't really a fan, but they seem to tolerate the heavy M3 well as far as wear goes. Agree that they're a good tire for a local event, but probably not one I would take to nationals either. I am curious about also trying the Falkens and seeing how they might handle the car, but I also don't want to be the guinea pig if they are terrible lol Love them so far on the SSC car, but its 1000lbs lighter.
Yoko/Stone seems to be becoming a popular combo too so interested to hear your thoughts on that too.

[dkexige]

Thoughts on proposed STU changes? No recording/link to STAC town hall on ST yesterday yet, but its mostly based on the April proposal:
https://cdn.connectsites.net/user_fi...pdf?1584737978

Newer forced induction BMW M and Audi RS cars coming into STU. Most of the significant rule changes otherwise are around forced induction. NA RWD gets 315 tires (if we can even fit that), but I'm not sure I see it competitive against a prepped M2 on 295, or even a 981 Cayman S...?

[Neuner]

^^ more myopic rules creep.

ST should be bolt on suspension and only the mildest (cat back) powertrain changes.
Anything significantly increasing power should be reserved for SP-Lite and above

The boost genie left the lamp in SP years ago. Seems we've forgotten the lessons that followed, assuming there was anything to be learned..