LS6Vette02

Search didn't help me, so...

I'm wanting to run V710s now, 315-35-17 on all four corners. Probably just get a set of reproduction ZR-1 wheels, unless theres a better solution for these size tires? Are stock C5 Z06 pads fine to use with these tires or do I also need race pads? I'll get some Wilwood H's later on, unless I have to have them, but would rather not spend the money upgrading brakes right now.

THANKS!!!!!

Jason

I'd find 4 Z06 front wheels if you can.
Stock pads will be ok for an event or 2, then they'll be toast.
I'd flush your brake fluid before your first event, you'll be surprised how much better your pedal feels.

Where are you running?

LS6Vette02

I've done a few events both at VIR and Road Atlanta. 315's won't fit on 9.5" wheels will they? I'm wanting to stick with that size because they are easier to find used. I'm basically wondering if the stock pads can hold up to the stickier tires?

Jason

I'm pretty sure I've had 315's on Z06 fronts.

Unless the pads are brand new, I'd buy a set of HP+ for the track and keep the stock pads for street use.

varkwso

Get the Gransport offset 17x11 wheels for 315-17s. I have run them a lot.

Stock height will not rub - but lowered cars will scrub the front fenders - check out Jakes FRC or TimZ06s C5Z- will also scrub DRM brake ducts.

I am currently running "square" 295-40-17 Kumhos on the FRC on 17x11 GS wheels - no issues at all - and it is pretty darn low - but has VBP springs.

Jason

Checked today. I have 315-17s currently mounted on stock Z06 front wheels.

I gotta start keeping an inventory list.

LS6Vette02

That's why I'd run stock pads if I could with the Kumho tires, since I'd also have to get the DRM ducts if I get race pads. At least my car isn't lowered. How close can you get to full deflection with the ducts and 315's?

LS6Vette02

Really???
Is that the same tire I'm talking about? V710 315-35-17?

varkwso

The stock ZO6 pads are OK with the V710s- I have never, and will not, put ducts into my ZO6 - have run Carbo XP8, 10 and 12s without any undue heat issues. You can get to full deflection - they just rub the ducts and hose

Kanmer

The better the brakes, the better you stop....the better you stop (or slow down) the faster you can go. This is just my opinion but I would upgrade the brakes as well as tires. XP12's w/ stickies work great.

Bob

LS6Vette02

There seems to be a trade-off here when it comes to brakes. Wilwood H's are supposed to last forever, but are very hard on rotors, whereas Carbotech pads are easier on rotors and probably don't require additional cooling. Their downside is having a much shorter life. I just figured that i'd stick with Wilwoods as I have plenty of rotors, which are much cheaper than brake pads.

How many sessions are you able to get approximately with 8's in the rear and 10's up front?

Jason

Why? It's on my short list for this season.

varkwso

I ran XP8s all around for about 30 track days....depends on how you drive and how you brake.

In 7 sessions at CMP a few weeks ago we ate ~1/2 of the front XP10s - we also ran consistent 1:44s/45s.

Jason - I ran the FRC with ducts and the ZO6 w/o at the same time at the same tracks - while I know deep down in my technical heart the ducts work better - track times, pad life and rotor life were/are statistically the same....

Bob - I like XP10s better than XP12s....

LS6Vette02

Well that sounds like their life is at least as good as sock pads. I know CMP is hard on brakes. I'll have to consider carbotech now and not even worry about brake ducts. I tend to brake deeper and harder to, which I would think uses less pad material than lighter and earlier braking habits. At least less heat, leaving more time for cooling.

Is there anyone else using 17x9.5 wheels all around and successfully mounted 315's on them? I already have two sets of original Z06 wheels so that would be great if it works.

Thanks a lot for the help guys!

C66 Racing

In answer to a few of your questions:
- I have used 315s on 17x10 and they bulge a lot and you don't get the full benefit of that wide a tire. You could probably fit 315s on a 17-9.5 wheel, but you'll get even more bulge. Not what I'd call ideal.
- I can't quite get full lock with 315s on 17x10 front with DRM ducts, but the only time I notice it is in the paddock. Never been a problem on the track. I did wear a hole in my original DRM ducts, but used some kevlar wrap (like putting fiberglass strips on) and they were virtually indestructable at that point.
- As for pads, I think that the stock pads will heat up too fast on the DOT R tires and you'll have some pretty serious brake fade about 10-15 minutes into a session. I'd get some dedicated track pads. Most Carbotech pads aren't that much... and you really don't need DRM ducts to run them.

C66 Racing

I'd disagree with you there. The energy going into the brakes is a function of the speed scrubbed off by the brakes. If you are going deeper into the corner, theoretically, you'd be on the throttle longer in the straight, thus have a higher speed before braking.

varkwso

I run 295s on 17x11 instead of the GS fronts (17x9.5) I have just to maximize the tire to rim geometry - I would run 315s but NASA TT rules won't let me . I agree with Subdriver on the 315 bulge degrading some of the benefit on the narrower rim - but it is feasible and I know the autoX guys do it all the time. Your tire mounter may hate you though...

LS6Vette02 - with your experience level I think your ZO6 pads will work out for your first time on R compounds (I assume these are takeoffs and not new V710s). You going to be at Rd ATL?

beerkat

I am running NT01 315/35/17 on all corners. I bought a set of wheels from TomZwheels that look like the Grand Am/ZR1 wheels. I bought them with a 50mm offset. The tire set out a little past the body now. I really like my set up. It is set up is similar to Varkwso except that his wheels have a 30mm offset so that they do not set out as far. I am running XP12 on the front and like the way they brake. I'm not as hard, yet, as Varkwso is on his so I get good life out of them.

varkwso

I'm the easy one - its Jake who wears them out...

LS6Vette02

Yeah, i'll be using takeoffs. I really hope I can go to RA, but may have to have surgery on my knee at the beginning off March. Have to wait an see what to doctor says.