TypeIsCheap

Good point. I was thinking about the ice mode comments earlier in the thread, the 315 Rival is just a bit shorter than 275 and quite a bit shorter than the 295.

chetly

I would look at running the Rivals on the rear and shaved Dunlops in the front. The Rivals don't have the greatest turn in but their forward grip is better than most, the Dunlops have great turn in but not as good forward grip as the Rival.

talon95

This is kinda interesting from the TX Tour yesterday,

B-Street:
T 1 199 Lane Borg 2004 Chevrolet Corvette Hankook
69.190 69.180 68.163 68.163

SSP (actually SSR car, they just self-bumped to SSP I think)
T 1 198 Vivek Goel 2002 Chevrolet Corvette
66.958 70.182(2) 67.266 66.958

Pretty fast for a car that doesn't work well on street tires supposedly.

93Rubie

I agree and I found that interesting as well.

gunluvS14

I don't know Lan Borg or Vivek Goel but it might have something to do with driver and course design.

ltborg

Well, I'm not really sure what to say about the car except that it felt like a Corvette on street tires. I had some entry oversteer on Day 1 that I had to drive around, but I fixed it with some damping adjustments going into Day 2. Once it was a little more stable on entry, I was pretty happy with. Like I told Sam, I'm not going to pretend the car was easier to drive than on R-Comps, but it was fun. Clearly it's working.

For those interested, I ran Hankook R-S3's (the old version not the Version 2 that was just released) in 255/35R18 fronts and 275/35R18 rears. The weather was gorgeous, 75 and sunny both days, but I still used tire blankets between runs. I'm not sure that it was necessary, but the tires certainly don't hate heat...

I'll get all the videos posted tonight for those who have been asking.

talon95

So are you going to Spring Nats Lane? What I found interesting when I ran the RS3's 2 years ago on my Z06 was that they seemed to work good everywhere I went *except* for Lincoln. I'm not sure if that was a failing on my part or not. I do know ST cars never PAX well at all at Lincoln. But I'm not sure if that's due to the street tires falling down badly there or Rcomps/slicks working relatively better.

Matt_27

Awesome driving Lane! You put quite a bit of time on the whole STU field as well, which bodes well for the C5 in STU prep.

brenb

Nice job at the Tour! I'm definitely interested to hear your impressions of the Hankooks. I'm debating the v.2 tires myself.

I'm just getting around to putting my 89 C4 back together after some engine trouble at Lincoln in 2010 - and a subsequent hiatus from autox. My timing is perfect as I'm coming back just in time for the classing/tire shake-up.

Anyway, if the car holds together I'll see you at Nat's.

ltborg

Signed up for both on my way to A&M. I honestly haven't paid that close attention to the ST classes at Nationals since one day of rain can really mess with the results. I chose Hankooks because several fast drivers said Dunlops and Hankooks do well in Lincoln (on heavy cars). Hankook has contingency, Dunlop doesn't.

Thanks! The car felt pretty good. I did a lot of research and got help from a lot of people to try and make sure the car was close to dialed in before arriving. I think it worked OK. Bolting on some 285s with some new springs does sound appealing though...

Thanks! Assuming it's available by April 30th, I'll be using them.

brenb

Yeah that sounds like a great plan, you should probably do that.

regganib

I just tried mounting a Rival 295/40/18 on a 9.5" rim with stock offset on the front of my C5Z. The tire is .3 wider in the tread and .8 taller than the Hoosier 295/35/17. I compressed the suspension to the point where the shock body contacted but did not compress the bump stop. At this point the tire was .25" away from contacting the top of the fender arch. Its pretty obvious that hitting a bump while in a turn will put the tire into the fender. I will be using 275s in front.

The tire is a little pinched on the 9.5 rim. So using the 275 may be the better performing tire anyway.

ltborg

ltborg

To try and keep this thread from being hijacked by R-S3 and non-Rival talk, I just wanted to say I put the videos from the Texas Tour in a B-Street build thread I just posted.

froggy47

Good to know, if it was a 35 series it may have worked.

talon95

It is a 35 series, but on an 18" wheel so it's almost an inch taller.

froggy47

The post said 295/40/18?

weekendracer

Not to jack the thread but I just picked up an 03z for autocross. I would like to run rivals but have not found a deal on a set of rears for the front. best prices I am seeing are over 250 a rim. Has anyone tried the 255/40 17 on the stock z fronts? am I going to run into too much understeer with the 255/40 17, 295,35 18? Only hope to run them for one season and hopefully sometime between now and next season I can find a deal on some rear wheels to put on the front.

I am guessing 255 rivals are still going to be better than a 275, 295 nt05 or an nt01 for autocross.

Thanks

autoxer6

Brian,
What shocks do you have? Did you buy Steve's? I'm wondering if yours are shorter than stock.

Chris Shay

ltborg

It could very easily be completely different between the Hankooks and the Rivals, but I would err on the side of setting up for more understeer than you might think compared to the A6's. That said, in a stock (street) class, there is only so much you can do so there is an advantage to getting all the grip you can at any cost, then balancing the car.

I just sold my wagon wheels (2 fronts, 2 rears) for about what you are finding for one C5 rear. The deals are out there and I think running 18s in the front in a big advantage (although I haven't tested that yet).