OVERKILL
$100 Site Donor 2021
Originally Posted By: MalfunctionProne
Originally Posted By: OVERKILL
Originally Posted By: horse123
Originally Posted By: OVERKILL
The 1/4 mile MPH's don't match the HP ratings. The GT-R, heavier, and with 50 less HP, trapped 2Mph higher. So either it is being under-rated by Nissan, that car is a ringer, or the 'vette isn't putting out its rated power.
Hi, do you know the difference between AWD and RWD?
Yes. Have you ever drag raced? Do you understand the correlation between trap speed and HP? If the answer is no to both of those questions then you have no business questioning me on my statement.
+1 and I think it was stupid of him to ask you.
AWD likely hooks up better, perhaps better to jump off the line, though RWD turns into an absolute rocket once it hooks up and the power comes on. .. right?
Kind of. Simplified, ET is determined in the first part of the track. How you come off the line, hook-up....etc. This determines how quickly you get down to the other end. ET is massively affected by traction, so an AWD car against a RWD car not on a slick with comparable power output will cut a lower 60ft time and get a better ET.
But both cars, assuming they are aerodynamically similar, will cut very similar trap speeds.
The reason for this is that trap speed is determined in the latter part of the track. Whether that initial acceleration happens during the first 60ft with a car that hooks solid or after that once a car that has spun gains traction, it happens very quickly. As you go up through the gears, and as your speed increases, the rate of acceleration decreases. This is where how much power a car makes becomes relevant, as in the higher gears, a car with more power will be able to achieve a higher trap speed in that distance.
A good example of this would be running a car on slicks vs on a street tire. Feathering the clutch or babying the gas, you'll be able to get a decent ET out of the car on street tires. On a slick, you'll be able to dump the clutch, hook solid, cut a MUCH better 60ft time and get a fantastic ET (for the car). But the MPH between the two runs will be nary identical. This is because what happens in the first little bit of the track has a very significant effect on the time it takes to get to the other end. But the power output of the car didn't change, so once the massive numerical advantage of the gearing used to cover that first bit of track is out of the picture, the rate at which the car accelerates over the remaining distance is the same. So the speed it comes through the traps at the end is very close to the same.
Now, you take two Mustangs, one with a 50 shot of nitrous on it and street tires, the other bone stock, but running a drag radial. The Mustang on the tire will come off the line faster than the one with the nitrous, who will have a hard time getting traction. The stock Mustang will 60ft better and may even end up with a better 1/8th mile ET. If the driver in the Nitrous car is really inexperienced and has a hard time with wheelspin, the stock car may even finish the 1/4 mile first. It would have a lower ET. But the car with the Nitrous will trap higher even if it finishes last. The reason is that once it found traction, it was able to accelerate to a higher speed in that distance than the stock car. This is representative of the addition 50HP it received from the Nitrous.
Weight is another factor. Two identical cars, but one is 50lbs lighter, that car will be faster. It will have a higher trap speed and a lower ET.
So you combine those two things, the additional 50HP and the reduction in weight, and what would the end result be on trap speed? It should be higher (unless it is towing a parachute).
Originally Posted By: OVERKILL
Originally Posted By: horse123
Originally Posted By: OVERKILL
The 1/4 mile MPH's don't match the HP ratings. The GT-R, heavier, and with 50 less HP, trapped 2Mph higher. So either it is being under-rated by Nissan, that car is a ringer, or the 'vette isn't putting out its rated power.
Hi, do you know the difference between AWD and RWD?
Yes. Have you ever drag raced? Do you understand the correlation between trap speed and HP? If the answer is no to both of those questions then you have no business questioning me on my statement.
+1 and I think it was stupid of him to ask you.
AWD likely hooks up better, perhaps better to jump off the line, though RWD turns into an absolute rocket once it hooks up and the power comes on. .. right?
Kind of. Simplified, ET is determined in the first part of the track. How you come off the line, hook-up....etc. This determines how quickly you get down to the other end. ET is massively affected by traction, so an AWD car against a RWD car not on a slick with comparable power output will cut a lower 60ft time and get a better ET.
But both cars, assuming they are aerodynamically similar, will cut very similar trap speeds.
The reason for this is that trap speed is determined in the latter part of the track. Whether that initial acceleration happens during the first 60ft with a car that hooks solid or after that once a car that has spun gains traction, it happens very quickly. As you go up through the gears, and as your speed increases, the rate of acceleration decreases. This is where how much power a car makes becomes relevant, as in the higher gears, a car with more power will be able to achieve a higher trap speed in that distance.
A good example of this would be running a car on slicks vs on a street tire. Feathering the clutch or babying the gas, you'll be able to get a decent ET out of the car on street tires. On a slick, you'll be able to dump the clutch, hook solid, cut a MUCH better 60ft time and get a fantastic ET (for the car). But the MPH between the two runs will be nary identical. This is because what happens in the first little bit of the track has a very significant effect on the time it takes to get to the other end. But the power output of the car didn't change, so once the massive numerical advantage of the gearing used to cover that first bit of track is out of the picture, the rate at which the car accelerates over the remaining distance is the same. So the speed it comes through the traps at the end is very close to the same.
Now, you take two Mustangs, one with a 50 shot of nitrous on it and street tires, the other bone stock, but running a drag radial. The Mustang on the tire will come off the line faster than the one with the nitrous, who will have a hard time getting traction. The stock Mustang will 60ft better and may even end up with a better 1/8th mile ET. If the driver in the Nitrous car is really inexperienced and has a hard time with wheelspin, the stock car may even finish the 1/4 mile first. It would have a lower ET. But the car with the Nitrous will trap higher even if it finishes last. The reason is that once it found traction, it was able to accelerate to a higher speed in that distance than the stock car. This is representative of the addition 50HP it received from the Nitrous.
Weight is another factor. Two identical cars, but one is 50lbs lighter, that car will be faster. It will have a higher trap speed and a lower ET.
So you combine those two things, the additional 50HP and the reduction in weight, and what would the end result be on trap speed? It should be higher (unless it is towing a parachute).