High speed racing bike vs car

[Dave-]

The deciding factor being tire contact patch and down force..

not the contact patch, but the down force helps yes.

[YellowDog]

Yeah that's mad downforce you idiot. A road car on road legal tyres will hardly pull any more lateral G than a sports bike if any. With top tyres in steady hands a sportbike will hit nearly 1.2 and sustain close to that... love cars, love bikes butplease don't get me started.

Comparing F1 to Motogp is so juvenile I don't want to even start. Motogp are barely any faster than world superbikes around most tracks with off the shelf Pirelli Diablo slicks. Compare it to something at least resembling road cars like JGTC/GT500 or FIA GT and you'll then see a reasonably fair 'comparison'. Those cars barely share any originality with their road counterparts anyway (different engines shifted rearwards, 330 section tyres, dog engagement transaxles, entirely carbon fibre body) and SBK bikes of a fraction the price will still lap the same as them.

Don't be ridiculous.

This twat settles the argument quite well:

[Camshaft]

luky no1 died

[macros87]

This twat settles the argument quite well:

doesn't seem to always work out that way... I do wonder if the cbr600 was the right fit for the challenge though.

http://www.youtube.com/watch?v=WaWoo82zNUA

[EJK]

[racefactory]

doesn't seem to always work out that way... I do wonder if the cbr600 was the right fit for the challenge though.

http://www.youtube.com/watch?v=WaWoo82zNUA

Please do me a favor and don't get me started mate

Without getting technical here... This is a horrible representation of a fair contest. As much as i love Top Gear- Clarkson is a well known big hater of motorcycles and the whole thing is really just a fun joke. If you watch this video you will see that this rider is anything but riding hard and is pootling around almost leisurely, even being held up by the Atom at points. The rider most likely does not know the circuit. I am surprised the bike was only 4 seconds behind. An educated guess would suggest CBR600RR would whoop that thing.

If Clarkson really wanted to show his point, why did they bother getting hold of a 600 instead of a 1000 and a rider of professional caliber on par with Stig. It's a joke.

If you really want to argue this one then I could give you reference to MANY serious tests from reputable car and motoring magazines such as Road and Track.

If anyone is interested I can dig out some issues of the quality car mag ''Speed'' , one in particular which took a stock 2005 ZX6R that whooped the XS engineering 589HP R34 (slicks etc etc) and a 500HP Z06 (You don't want to know what the ZX10R did). It's an extremely interesting and methodical article and they even performed SKID PAD lateral G tests with the bikes which not even the avereage biking magazine would dream of.

In a nutshell, without extreme down-force modifications (under-tray with air vortex splitters and venturis, advanced air flow management both in and outside car), rider and driver of equal ability... production road cars (including purpose built road legal track cars) will have an extremely hard time reliably beating a ''jump on and ride'' stock sports motorcycle around a circuit.

I study engineering and track performance is one of my passions that I could just go on and on with! .... Really though, they are just apples and oranges.

[YellowDog]

Agree with your comparison. On that track, the Atom may well be better. But the Atom isn't a road car just anyone can buy. A big bore track bike may well have produced a different result.

[Dave-]

But seriously, why is it when you talk to people about which is faster, do they start talking about the contact patchs?

[racefactory]

But seriously, why is it when you talk to people about which is faster, do they start talking about the contact patchs?

Know what you mean and it drives me nuts! Have they heard of μ me thinks?

[onearmedbandit]

So contact patch has no effect on braking performance? Or ability to get power down? Will a 155 offer as much 'grip' as a 235?

[Dave-]

Know what you mean and it drives me nuts! Have they heard of μ me thinks?

I don't think they've heard of the normal force either, which makes explaining the equation difficult.

[racefactory]

@ onearmedbandit

what that guy said ^^^

[bogan]

So contact patch has no effect on braking performance? Or ability to get power down? Will a 155 offer as much 'grip' as a 235?

depends whether you're on a bike, or in a physics 101 lecture

[Kickaha]

or in a physics 101 lecture

Don't people just go to shit like that so they can post big boring explanations with equations to make themselves feel superior to others on the forums?

[onearmedbandit]

Yer iz just a fick biker, tieing ma shoolazers iz hurd nuff foor me.