Track Condition

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rollazn

rollazn

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rollazn
We all know that track condition matter alot in a race, but how much? How much can it improve your times? I know there are windy days which give cars an amazing advantage. Due to wind they can get unusual times. Here is an example.

I watched Best MOTORing Roaring VTEC the other day, and they have 4 different NSX's doing 0-400M times.

They had these 4 NSX doing numerous of runs... here are the result...

Old Type S vs New Type S = Old Type S. Both cars ran in the 13.249 range.

Old Type R vs New Type S = New Type S. Takaya ran a 12.7 while GanSan ran around low 13s.

Old Type S Zero vs New Type S = Old Type S Zero. Takaya ran 12.4 while Gan San ran 13.1.

The best for the new type S was 12.7. But the old Blue type S ZERO hit 12.4s.

I also saw a Best MOTORing video with a GT-R doing 12.4 in the 1/4. But that video was shot during the winter, all cars did amazingly well. Both Evo and STi ran 12.8, it was very windy. From watching the videos, you can see the big different in wind condition.

Basicallly I am wondering about track condition. I know on cold and windy days all cars perform better, but on hot and humid days, there has been a rumor that turbocharged car arent going to do as good as a N/A car.

Also 12.4 and the normal 12.8 that they run on the 1/4 is a pretty big difference. Could this be to track conditions?
 
On the turbo vs. N/A question, I'm fairly sure the turbo would do worse than an N/A car with similar horsepower. I can picture how it would work in my head, but I couldn't explain it for my life right now. Someone who's good at that sort of thing please enlighten GTP on the scientific aspect of this.
 
Originally posted by Ev0
On the turbo vs. N/A question, I'm fairly sure the turbo would do worse than an N/A car with similar horsepower. I can picture how it would work in my head, but I couldn't explain it for my life right now. Someone who's good at that sort of thing please enlighten GTP on the scientific aspect of this.
Click to expand...

The turbo would loose because there is turbo lag. That's the time it takes for the turbo to spool up.
 
Originally posted by rollazn


I watched Best MOTORing Roaring VTEC the other day, and they have 4 different NSX's doing 0-400M times.
Click to expand...
They had a similar test on a WRC program in america on speed TV with the WRX.
 
The reason why turbo cars do crappy in hot temperatures is because hot air is less dense. Cold air is more dense and thus having more volume. The more volume the air has that your turbo is force-inducting, the more horsepower your engine will produce.
I do notice this difference in daily driving. In 10-40 degress F my car hits peak boost (20 psi) at about 300-500 rpm's faster than when it is above 50 degrees F.

As well as boost levels are effected. If I drive to work in the morning and the air is colder, I will hit a boost spike of 22psi and the boost controller and wastegate will do their jobs and I will hold bost at 20psi. When I go out for lunch later that day when the air temp is warmer, even after not touching my boost controller, the car may spike boost at 20psi and level off at 17-18psi. Air temperatures affect turbocharged cars greatly.
 
I know that Turbo has the disadvantage in the hot humid days. Im just not sure why.

West Side Ninja, we are not comparing what is faster, Turbo or N/A. Im refering to Turbo in hot humid conditions.

Im referring to lets say a GT-R and a NSX. They usually run about the same, and on hot humid days, would the GT-R actually do worse then they usually do?
 

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