TRAKCAR

Hoping for some charitable advise here from the first guys taking the cars to the track in anger. I’m sure the free advice will be expensive :-) 👍

- Safety? What are you guys putting in for roll bar / harness? Or just winging it with a 3 point seat belt?

- Brake pads and fluid. I know it’s not the Z06, but trying to find out what it takes at a 90F Sebring day to empty a tank a gas without brakes going soft. I’m very big on gentle warmups and cool downs to keep the rotors from cracking and I’m OK to spend the money on cooling and bigger brakes, if it’s needed. Looking into ST rotors if they are available in the size needed.

- What track tires are available on the OEM wheels? I dont like R7, I’ve had too much bad luck with them to never try again. Slicks I assume are too much for the brakes, and I’ll take tire life over laptime. I’ve a lot of experience with Michelin Pilot Sport CUP N2 and Dunlops SportMaxx 2.

-Not looking rough make the car faster, just consistent and without overheating anything.

What else do I need to know?

MitchAlsup

HPDEs allow the use of std seat belts.

[/QUOTE]- Brake pads and fluid. I know it’s not the Z06, but trying to find out what it takes at a 90F Sebring day to empty a tank a gas without brakes going soft. I’m very big on gentle warmups and cool downs to keep the rotors from cracking and I’m OK to spend the money on cooling and bigger brakes, if it’s needed. Looking into ST rotors if they are available in the size needed.[/QUOTE]

The Z51 kit comes with more radiators, and brake cooling ducts. Always have fresh high dry temperature brake fluid in the system (dry boiling point over 595ºF).

You will learn the edge of the envelope FASTER if you stick with street tires. The lesser grip also takes heat out of the brakes, engine, and transmission.
Max Performance summer tires or Ultra High Performance tires (Tire Rack) will give you the information you might desire.
Sticking to OEM wheel widths also save brakes, and enable you to learn the traction envelope at lower danger levels than wider tires and especially slicks.

Braking is (generally) the last thing an up-and-coming driver learns to do well.
Pads and rotors are consumable items--just like tires and gasoline.
And once you have learned the proper braking techniques, the brakes tend to last a lot longer.

TRAKCAR

I should have explained that I’m an experienced driver and instructor, 500+ track days, most tracks in the US and Europe..

Dane@LGmotorsports

We didn't track it with the stock fluid so I'm not much help there, we had no issues through running Endless RF650. Stock pads had ~4,000 miles on them and were done after a track day. We swapped over to ST43's for COTA and really liked the result. Popping race seats and building harness mounting in the next couple weeks, doesn't seem to be any finished options out just yet.

TRAKCAR

Thanks Dane, appreciate it.

Endurance fluid and pads I would do from the start, more cooling available to the fronts? Maybe its not even needed?

What is ST43?
I referred to ST (Surface transforms) that I am familiar with, but I assume there will be ceramic options coming available as well on the Z06.

Dane@LGmotorsports

Sorry I should have been more specific Raybesto's ST43 Compound. So far the factory cooling on the car has been very good (Z51) we'll see how it does as we progress and go faster. Ambient temp was 91 at COTA.

Poor-sha

Definitely flush the fluid - I boiled the stock fluid running a moderate pace with my son as a passenger. I would also do some kind of alignment. The stock alignment is 0.5 deg of camber. At least remove the washers and get 1.6 deg and fix the toe.

Stock pads work surprisingly well but they will wear fast on track. I think you'll get 2 days out of them though. I'm going to move to the AP Racing kit since it looks like I'm going to be tracking this car more than a couple times.

As far as tires are concerned I do not care for the stock tires but they are wearing well. I bought another set of stock wheels and the Goodyear 3R tires in stock sizes. I hope to get them on track next week.

As far as safety equipment I am sticking with stock. I'm not a fan of piecemeal replacing the factory safety system and I've totalled a C7 on track with only stock belts and a Simpson hybrid.

Poor-sha

One more thing. Absolutely make sure you add the extra 2 quarts of fluid to the transmission. It's a pain but do it once and leave it in.

J5isalive

What i found with the C8 on track is that it was too soft, yes my car has the Z51 package. Dont get me wrong, the car is incredibly capable but how the car is soft is not confidence inspiring to an amateur like myself.

There is tons of rear end grip but as you enter a turn you have to wait for the rear weight to shift to that outside tire and then you have to let the car sit on that tire... this waiting game makes the car a little unnerving, so i was not as fast as i could have been and was inconsistent.

Some vendors are producing shock packages that address this issue, the car benefits ALOT from some compression adjustment.

Enjoy the car! Its really fun on track and with some investments in key areas I'm confident its going to be amazing!

TRAKCAR

Soft (to soft) may actually work well on very bumpy tracks, thanks for the explanation 👍

TRAKCAR

2021 bump.

Just looking for track feedback for a Z51.

B Stead

It's suspected that the C8 can push against the bump stops at maximum cornering. It needs stiffer springs, or stiffer swaybars, or no lowering, or shorter bump stops, or delrin suspension bushings in general.

However, when a car gets off the bump stops it no longer plows when exceeding the cornering limit but can fan-out the rear-end just on too much entrance speed. So there's a driving adjustment to make.

Now stiffer springs and swaybars should be relative to how fast-a-responding car that the driver can handle
.

TARANTULA

Porsche track car?

TRAKCAR

👍

No track Porsches at the moment..

rrsperry

Track day insurance? I’d make sure I had that. Lol

CP

Someone else's C8.

CanadianVetster

Do I need fully forged wheels or can I use OEM, rotary forged, flow forged, spun forged , etc..
or only fully forged are recommended?

KNSBrakes

We now have plenty of experience with Track C8s so if you have any questions regarding brakes feel free to reach out to us any time!
-Coby

TRAKCAR

Have had it for the last 6 years.

Haha, are you volunteering?

Thanks, not annoying you till I have the car.
Would love Surface Transforms again. Anyone done that?
Any brake cooling kits, front rear?

KNSBrakes

That would go against normal ceramic brake design where the rotor and pad volume are maybe 25-30% 'larger' to create a similar performance envelope.

So far we are just wearing front pads and getting some judder on the front discs. That will probably change when the slicks and warmer days hit later this year.

-Ken