Originally Posted By: OVERKILL
Originally Posted By: 02SE
There are lots of variables.
On a prepped drag strip, it's true that a higher horsepower RWD car will still usually be able to hook up fairly early in the run. So it's higher HP will reflect in the trap speed, as compared to a lower HP AWD car that can get out of the hole quicker, and might be able to hold that hole-shot advantage to get to the end of the track quicker, even if it's trap speed is lower.
On public roads, or otherwise dirty pavement where so many "Racing Videos" take place, traction is usually at much more of a premium. So conducting short races like a 1/4 mile run on those low-traction surfaces, the high HP RWD car may not get hooked up until well into the run, if at all. In those cases the higher HP RWD car might not show a higher trap speed, because it never could get enough traction to take advantage of it's better power-to-weight ratio.
This is true. My references are all in regards to a race occurring at a track where the distance of the run is going to be accurate, the surface is going to be properly prep'd and trap/ET would be verified by proper equipment and the run started with a tree rather than a kid waving a scarf
The video at the beginning of this thread was performed on a proper track and the closeness in ET (11.0 vs 11.4) indicates that they didn't have much of a problem hooking the 'vette up (and the tires were very nice too, as I'm sure you noticed). In fact, they were closer on that than I expected. My issue was with the trap speed difference given the closeness in ET. Unless the 'vette was pulling a parachute, it has a 50HP advantage and less weight. It should have trapped higher. It does have quite the wing on it, but then so does the GT-R. Maybe not as severe though, given the difference in the lips between the two.
If the aero package on the 'vette is negating the weight and power advantage to the point that it traps lower, I would be very surprised. But that's what Steve seems to think is happening here
I'd think that the GT-R perhaps is simply making more than what it is said to be making (kind of like the '03/'04 Cobra Mustang). Which then causes the whole works to make sense.
I doubt the wing on the Corvette is affecting it at 124 or whatever it trapped at.
Maybe the Z06 is just to new and all the bugs are not worked out yet. The GTR is an old and well worked over platform right now. The early GTR's not so much.
Maybe the Z06 was hot and the ECU was cutting power? What kind of gas were they running? I know it can run on 93 but maybe at the track they could have used a higher octane and that would have kept the ECU happier.
Or Nissan sent a ringer and that GTR was way over the rated HP. They should have put those two cars on a dyno.
Originally Posted By: 02SE
There are lots of variables.
On a prepped drag strip, it's true that a higher horsepower RWD car will still usually be able to hook up fairly early in the run. So it's higher HP will reflect in the trap speed, as compared to a lower HP AWD car that can get out of the hole quicker, and might be able to hold that hole-shot advantage to get to the end of the track quicker, even if it's trap speed is lower.
On public roads, or otherwise dirty pavement where so many "Racing Videos" take place, traction is usually at much more of a premium. So conducting short races like a 1/4 mile run on those low-traction surfaces, the high HP RWD car may not get hooked up until well into the run, if at all. In those cases the higher HP RWD car might not show a higher trap speed, because it never could get enough traction to take advantage of it's better power-to-weight ratio.
This is true. My references are all in regards to a race occurring at a track where the distance of the run is going to be accurate, the surface is going to be properly prep'd and trap/ET would be verified by proper equipment and the run started with a tree rather than a kid waving a scarf
The video at the beginning of this thread was performed on a proper track and the closeness in ET (11.0 vs 11.4) indicates that they didn't have much of a problem hooking the 'vette up (and the tires were very nice too, as I'm sure you noticed). In fact, they were closer on that than I expected. My issue was with the trap speed difference given the closeness in ET. Unless the 'vette was pulling a parachute, it has a 50HP advantage and less weight. It should have trapped higher. It does have quite the wing on it, but then so does the GT-R. Maybe not as severe though, given the difference in the lips between the two.
If the aero package on the 'vette is negating the weight and power advantage to the point that it traps lower, I would be very surprised. But that's what Steve seems to think is happening here
I doubt the wing on the Corvette is affecting it at 124 or whatever it trapped at.
Maybe the Z06 is just to new and all the bugs are not worked out yet. The GTR is an old and well worked over platform right now. The early GTR's not so much.
Maybe the Z06 was hot and the ECU was cutting power? What kind of gas were they running? I know it can run on 93 but maybe at the track they could have used a higher octane and that would have kept the ECU happier.
Or Nissan sent a ringer and that GTR was way over the rated HP. They should have put those two cars on a dyno.
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