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- Canberra
- Unwired-Eddie
Wear 'n' Tear
In response to a couple of members suggestions, I bring you part two of the Z06 vs C5R challenge.
The aim of this test is to compare the tyre wear on the two vehicles.
The Contenders
Chevrolet C5R Race Car
This vehicle has been left in stock condition.
Chevrolet Z06 (C5)
This vehicle was modified in Tune-up Challenge #3
Method
Both vehicles will be entered in the Circuit de la Sarthe 24h I race. B-Spec Brett will drive both vehicles for 8 laps using TCS/ASM=0 and speed setting=3. Tyres (racing medium) will only be changed when completely worn and the fuel tank shall be filled completely each time the car pits. A-Spec Brett will control the pit stops.
Results
First up is the C5R. Not a real contender for the race win, the car is quickly left behind by the rest of the field. Laps 1 and 2 see green tyres all 'round but on lap 3 the fronts are definitley yellow. On lap 4 the front tyres go reddish orange and B-Spec Brett throws on the Pit In indicator approximately 200 metres from the pit entrance. Front tyres changed and fuel topped up with 33 more lires of fuel, B-Spec Brett pulls back in to the race and continues on his merry way. Laps 5, 6, 7, and 8 are identical to the first four laps. This time as B-Spec pulls in to the pits he needs fronts and rears, and the fuel is back down to 47/80.
Now the Z06 comes out to play. The field leaves him behind from the start but with the extra power it carries it seems to have drawn a smarter, if not faster field. Running 4 - 5 seconds a lap faster than the C5R, the Z06 seems to go easier on tyres too. Considering it still weighs more than the C5R, this is not a bad feat. Despite the front tyres showing a lot of orange, B-Spec Brett pushes the Z06 half way through lap 5 before signalling the pits. Front tyres changed and fuel topped up he heads back out to the track but signals the pits again near the end of lap 6.
This time it is the rears that need changing. The extra weight might not be hurting the front tyres, but the extra HP at the rear is killing the rubber 2 laps faster than the C5R. Laps 7 and 8 go off without a hitch and B-Spec Brett retires from the race. Sorting through the data presents many different conclusions. Obviously only changing the tyres that needed changing would not work well for the Z06 in a real endurance race, however the C5R had to pit every 4 laps anyway so leaving the warm rubber on the car may help - or at least it wont hinder.
There are two noticable differences between the cars. The first is the fuel economy. The C5R averages about 7.8 L of fuel per lap, compared with the Z06 at 8.9 L. This may have a bearing on pit strategy using harder compound tyres. The second difference is in the lap times. At the end of lap 8, the C5R was only 0.5 seconds behind the Z06's time, however the C5R was in the pits at the end of lap 8 and would therfore be about 15 - 20 seconds behind the Z06 in real terms.
Conclusion
This one is easy - the Z06 is getting better wear than the C5R. While it may eat the rear set of slicks quicker, changing them at the same time as the front tyres will solve the problem instantly.
In response to a couple of members suggestions, I bring you part two of the Z06 vs C5R challenge.
The aim of this test is to compare the tyre wear on the two vehicles.
The Contenders
Chevrolet C5R Race Car
This vehicle has been left in stock condition.
Chevrolet Z06 (C5)
This vehicle was modified in Tune-up Challenge #3
Method
Both vehicles will be entered in the Circuit de la Sarthe 24h I race. B-Spec Brett will drive both vehicles for 8 laps using TCS/ASM=0 and speed setting=3. Tyres (racing medium) will only be changed when completely worn and the fuel tank shall be filled completely each time the car pits. A-Spec Brett will control the pit stops.
Results
First up is the C5R. Not a real contender for the race win, the car is quickly left behind by the rest of the field. Laps 1 and 2 see green tyres all 'round but on lap 3 the fronts are definitley yellow. On lap 4 the front tyres go reddish orange and B-Spec Brett throws on the Pit In indicator approximately 200 metres from the pit entrance. Front tyres changed and fuel topped up with 33 more lires of fuel, B-Spec Brett pulls back in to the race and continues on his merry way. Laps 5, 6, 7, and 8 are identical to the first four laps. This time as B-Spec pulls in to the pits he needs fronts and rears, and the fuel is back down to 47/80.
Now the Z06 comes out to play. The field leaves him behind from the start but with the extra power it carries it seems to have drawn a smarter, if not faster field. Running 4 - 5 seconds a lap faster than the C5R, the Z06 seems to go easier on tyres too. Considering it still weighs more than the C5R, this is not a bad feat. Despite the front tyres showing a lot of orange, B-Spec Brett pushes the Z06 half way through lap 5 before signalling the pits. Front tyres changed and fuel topped up he heads back out to the track but signals the pits again near the end of lap 6.
This time it is the rears that need changing. The extra weight might not be hurting the front tyres, but the extra HP at the rear is killing the rubber 2 laps faster than the C5R. Laps 7 and 8 go off without a hitch and B-Spec Brett retires from the race. Sorting through the data presents many different conclusions. Obviously only changing the tyres that needed changing would not work well for the Z06 in a real endurance race, however the C5R had to pit every 4 laps anyway so leaving the warm rubber on the car may help - or at least it wont hinder.
There are two noticable differences between the cars. The first is the fuel economy. The C5R averages about 7.8 L of fuel per lap, compared with the Z06 at 8.9 L. This may have a bearing on pit strategy using harder compound tyres. The second difference is in the lap times. At the end of lap 8, the C5R was only 0.5 seconds behind the Z06's time, however the C5R was in the pits at the end of lap 8 and would therfore be about 15 - 20 seconds behind the Z06 in real terms.
Conclusion
This one is easy - the Z06 is getting better wear than the C5R. While it may eat the rear set of slicks quicker, changing them at the same time as the front tyres will solve the problem instantly.
