I originally intended to make a test to confirm my assumption that cars in GT4 can have a maximum loss of ca. 9,7 % (with +/-0,3 % tolerance) of their original power. This also applies to cars like the four black race cars.
I started the test and went to sleep and came back when the car had run 8300 km. I found out that the car does not reach its minimum after 8500 km as stated in this forum - it's much later. I collected enough data to make a graphic. Unfortunately I missed the first 8300 km, which means my graphic was incomplete. So later I decided to repeat the test up to the point of 8300 km (same conditions of course). Results were a bit surprising to me. Here are some facts:
Goals:
- finding out when a car reaches its minimum power
- confirm loss of power is ca. 9,7 %
- in addition: collect data of first 8300 km for graphic
Car: AMG Mercedes CLK-GTR '98, new (0 km, 797 PS), no mods, only high speed setting (two different ones on first an second test)
Track: Test Course
Driver: B-Spec
Collected data:
- distance in km
- power in PS (hp)
Results:
- 48 marks of distance and power recorded
- loss begins at about 1000 or 1100 km
- dropping is linear in 3 sections, there is a remarkable steep drop between 5300 km and 6300 km with a loss of 1 PS per 25 km, while before and after it is about 1 PS per 270 km
- minimum is assumed to be reached when the power doesn't drop further over a distance of 1000 km
- minimum of the CLK-GTR is 719 PS after ca. 11300 km, that's a loss of 9,79% (which corresponds to my assumptions)
- after reaching 8306 km in my first test (I slept) the power had dropped to 730 PS, in the second test (different setup with slightly higher speed) it was 731 PS, it's visible as a little bump in the graphic
- after the test the car was still absolutely clean, rigidity refresher had became available, oil turned black
- car had lost 10,6 % (78750 Cr.) of its original value
- lap times in this particular constellation became ca. 3 s slower due to loss
New assumptions:
- I'm pretty sure other cars would show other characteristics, e. g. my Playstation Pescarolo C60 '04 at 8900 km has lost about 8 %, while the CLK-GTR from this test had lost over 8,5 % at that distance
- loss may depend on driving style: this was a test with constant speed and almost no acceleration, no crashes and little changing stress on the car, in a real race the loss of power may be different
- note the steep drop occures at a distance that corresponds to the final phase of a 24 h Le Mans race (if car started brand new) - should that make our races more exciting?
So I got the answers I was looking for. Maybe I will repeat this test with another car, R8 or Speed 8 (I like them with less power 'cause it would be more realistic). Feel free to do this test with your car and let me know what you find out about your engine characteristics!
I started the test and went to sleep and came back when the car had run 8300 km. I found out that the car does not reach its minimum after 8500 km as stated in this forum - it's much later. I collected enough data to make a graphic. Unfortunately I missed the first 8300 km, which means my graphic was incomplete. So later I decided to repeat the test up to the point of 8300 km (same conditions of course). Results were a bit surprising to me. Here are some facts:
Goals:
- finding out when a car reaches its minimum power
- confirm loss of power is ca. 9,7 %
- in addition: collect data of first 8300 km for graphic
Car: AMG Mercedes CLK-GTR '98, new (0 km, 797 PS), no mods, only high speed setting (two different ones on first an second test)
Track: Test Course
Driver: B-Spec
Collected data:
- distance in km
- power in PS (hp)
Results:
- 48 marks of distance and power recorded
- loss begins at about 1000 or 1100 km
- dropping is linear in 3 sections, there is a remarkable steep drop between 5300 km and 6300 km with a loss of 1 PS per 25 km, while before and after it is about 1 PS per 270 km
- minimum is assumed to be reached when the power doesn't drop further over a distance of 1000 km
- minimum of the CLK-GTR is 719 PS after ca. 11300 km, that's a loss of 9,79% (which corresponds to my assumptions)
- after reaching 8306 km in my first test (I slept) the power had dropped to 730 PS, in the second test (different setup with slightly higher speed) it was 731 PS, it's visible as a little bump in the graphic
- after the test the car was still absolutely clean, rigidity refresher had became available, oil turned black
- car had lost 10,6 % (78750 Cr.) of its original value
- lap times in this particular constellation became ca. 3 s slower due to loss
New assumptions:
- I'm pretty sure other cars would show other characteristics, e. g. my Playstation Pescarolo C60 '04 at 8900 km has lost about 8 %, while the CLK-GTR from this test had lost over 8,5 % at that distance
- loss may depend on driving style: this was a test with constant speed and almost no acceleration, no crashes and little changing stress on the car, in a real race the loss of power may be different
- note the steep drop occures at a distance that corresponds to the final phase of a 24 h Le Mans race (if car started brand new) - should that make our races more exciting?
So I got the answers I was looking for. Maybe I will repeat this test with another car, R8 or Speed 8 (I like them with less power 'cause it would be more realistic). Feel free to do this test with your car and let me know what you find out about your engine characteristics!
