Vetch

I'm cross posting this on three RL forums to get a some opinions on a question.

For a car that would only be used for track events, would you expect a 718 GT4 and a 991 GT3 to have about the same costs in consumables such as tires, rotors, and pads?

Hey... at least its not a question about depreciation!

gt38088

More cost for GT3 - more power, more weight, faster speeds for braking, larger tires. This assuming the extra performance is being used

GrantG

I’ve had both and the costs are about the same (uses same pads and rotors and tires are almost same). Brakes wear bit faster with 3.

3 is faster and heavier, but has better suspension which results in less understeer (helps with front tire wear).

Mika911

I have seen the internal actual cost calculations for a big rental company at the Ring. They are very close with the GT4 a little higher. One factor is the higher front tyre wear, as they dive a lot more than the GT3. Figures were too close to choose one over the other though based on consumables cost.

zedcat

I owned and tracked 981 GT4 and 991 GT3 concurrently. Brake parts cost the same. GT3 uses them a little faster but in practice I would change them after the same number of events. Tire cost for me was lower on the GT4. I would also change these at about the same number of events but a set of RE71s for the GT4 cost $500 less than MPSC2 for the GT3.

Jickel180

^^ Tires are where you're going to find your major consumable savings. Really wish we could run a right-sized RE71 or NT01 on the GT3s.

GrantG

Good point - I only used OEM Dunlop’s and Michelins on my GT4. Bridgestone save a bunch of money...

Bossing

GT4 lower consumables cost for me.... my GT3 tires are the primary higher pricepoints.

Mech33

I’ve extensively tracked both a 991 GT3 and a 981 GT4, and as folks have said, the main difference is tire cost. Tires last about the same number of events, but the RE71R option in the GT4 saves $600 per set.

The other consideration is that the 5-lug wheel on the GT4 gives you more options for tire service vs. the dealer (I’d you don’t R&R the GT3 centerlocks yourself).

A/S

RE71R have been available for the GT3 for 2+ years. Just use the proper size wheels (hint 19").

I can't justify the amount of $$$ wasted on super expensive street tires with low treadwear ratings, to lap several seconds behind the pace of these cars. If you're fast, you won't be on street tires. If you're slow, why waste money on super expensive street tires?

Kumho makes 275/305 V720 that cost $900/set

GoodYear makes an excellent F1 SuperCar3 tire (not the 3R, that is faster and wears faster too), for $300 a piece. This is the Camaro SS-1LE tire.

The two tires above only leave a few tenths to the latest Dunlop/MPSC2-Nx factory equipment. BFG Rival-S and the RE71R are available too in good sizes. The sway bars are adjustable in case you go wider/narrower front or rear.

For track day use, the tires are the biggest ticket, so this is where affordable jumps in (and those awesome Ferodo 3.12 that everyone is bragging about).

I personally don't track on street tires, I like to travel in a comfortable tow vehicle to my events, and I like affordable race tires too (scrubs from my own local trusted source).

....and if you're fast the you spend more, if you're slow you spend less.

malmasri

cost is comparable. properly set up GT4 is more enjoyable trackday car

GrantG

Strongly disagree, unless "properly set up" is something far more extreme than my setup with my GT4 (991 Cup control arms and thrust arm bearings with corner-balanced track alignment and Race Technologies RE10 pads and Endless RF650 fluid). 100% stock Manual GT3 exactly as delivered is way more fun than above...

Mech33

I'd rank my track enjoyment between my previous cars as follows:

991.2 GT3 manual > 981 GT4 > 991.1 GT3 PDK

The power of the GT3 on track just adds another level that is missing in the GT4. To be clear, they're all a blast.

Jickel180

If I'm going 19" I'd run a 265/35/19 and 325/30/19 sizes on the GT3 but you can't get the RE71R in anything wider than a 305, and you can't get a NT01 in a 265/35/19 either.

Both of those tires offer similar levels of grip but most importantly they offer that grip level until they're corded. Can't say the same for the PSC2.

So similar levels of grip with a significantly less cost for a replacement are what any normal track rat would love to have. Haven't tried the Cup 2 N2 yet although I hear it's more durable.

malmasri

Agree on the issue of power, or lack of in this case. However, the way the mid engine chassis handles is something the rear engine gt3 lacks.
“The feeling of riding a gt3 vs a gt4 that feels wrapped around you”.
The ideal track day car is a gt4 with a gt3 motor.