Supra, BMW tuners, and snowmobile videos

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Mar 8, 2006
  #1  
Top Gear has the Stig jump with a snowmoblie off a ski jump.
Snow Mobile Ski Jump

Toyota Supra vs Hayabusa

BMW M3 vs Alpina vs Hartge
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Mar 9, 2006
  #2  
obviously the busa had a n00b for a rider
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Mar 9, 2006
  #3  
Quote: obviously the busa had a n00b for a rider
Bikes esp. have an edge from a full stop, and typically, in a long enough race, will get passed by cars on the top end. Both those races were from a roll, it doesn't take a whole lot of skill to race from a roll on a bike, launching is the hardest part. A built enough Supra could take that bike, no problem.
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Mar 9, 2006
  #4  
true but i'd say the busa still has more hp/lbs and also better aerodynamically, which would benefit it at high speeds...i do believe a car can overtake a bike, just not that soon as in the vid
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Mar 9, 2006
  #5  
i thought bikes have worse aerodynamics?
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Mar 10, 2006
  #6  
yeah but, how often do you see a car take a bike?

we're talking 2400lbs vs 400 with driver on it? 600 @ max?????? hp doesnt really come to matter when your weight difference is 2000pounds
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Mar 10, 2006
  #7  
Quote: obviously the busa had a n00b for a rider
you do realize that that supra has to have over 800 whp, i went to their site and it said that supra ran an 8. something seconds on quarter mile. i dont think the busa rider's a noob. you try going 200mph on a bike. i'm not saying i've done it, but i sure dont think it's an easy thing to do.
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Mar 10, 2006
  #8  
lots of misinformation here. Bikes have a much worse drag coefficient than cars. Their frontla area is less, so that helps, but they are still worse. Top speed depends more on your torque curve than HP. HP gets you there faster, but torque holds you there. The bike has no torque and the supra makes his high in the powerband, so it's gonna pass the bike eventually. Think of a lotus, it has a great power to weight ratio, but it has a tiny engine to it tops out at the same MPH as old caprices that had huge iron block V8s (gearing comes into play too)
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Mar 11, 2006
  #9  
Quote: lots of misinformation here. Bikes have a much worse drag coefficient than cars. Their frontla area is less, so that helps, but they are still worse. Top speed depends more on your torque curve than HP. HP gets you there faster, but torque holds you there. The bike has no torque and the supra makes his high in the powerband, so it's gonna pass the bike eventually. Think of a lotus, it has a great power to weight ratio, but it has a tiny engine to it tops out at the same MPH as old caprices that had huge iron block V8s (gearing comes into play too)
Yeah, but those old iron block V8s had low output. You are right though, bikes have poor aerodynamics, though the Busa was designed to have better aerodynamics, which, in part, are responsible for the fact that it looks kind of ugly, heh.

Top speed is determined (other than by aerodynamics) by engine output. The thing limiting your top speed is drag. So when force of engine = force of drag pushing against car you can't go any higher. If there were no drag and you were racing in the vacuum of space, you'd accelerate to infinity, because there would be nothing to detract from the energy being added. So even though the bike may take the car initially, the car will eventually catch up once the bike hits its drag limited top speed if the car has enough power to exceed it's drag coefficient, the fact is, that, owing to the weight, it takes the car longer to get to that maximum speed, because it takes more time to impart 'x' amount of energy/momentum on 'm' amount of mass. Gearing comes to play a part too...a lot of bikes aren't necessarily geared to go any higher than 200mph, they're limited around that mark usually, and w.out the limiter you'd have maybe another 2-3k RPM to play with, tops, after that, you're out of gearing to go faster..
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