Help, stats needed. V8 v Motormacycle

[TonyB]

The NZ V8s are a very different animal to the Aussie V8 Supercars. NZ has about 400hp and 4 gears in a standard GB, Aussie has 600+ and a 6 speed sequential clutchless GB thingy

[sAsLEX]

I see this brought up alot, can you tell me why a 125GP bike can corner faster than a MotoGP when it has narrower tyres? Anyone??

thing called physics! they are about as heavy as a wet bus ticket therefore forces etc make the tires do less work blah blah stuff

[avgas]

Just about forgot at the first Drink Drive 500 (liquor King) the fastest TransAm car was faster than the fastest bike by about 2/100ths of a second on the first day with both bikes and cars using the same track configuration
but thats a purpose built race car vs modified road bike

Yeh had one of the guys who made that chev, was suppose to get back to me about some work - then he packed up an went to the states to do daytona cars.
superlight body, with 600+hp motor in those TransAms, im not supprised they beat a bike.
Very few of the race bikes in NZ wack out more than 200hp
besides the fastest time for anything on puke is done by........

[NordieBoy]

thing called physics! they are about as heavy as a wet bus ticket therefore forces etc make the tires do less work blah blah stuff

And when leaned over the narrower tyre keeps the centre of effort nearer the centre line of the wheel which produces less torque effects pulling the bike upright etc etc etc.

[Pixie]

The main point being: with the exception,maybe, of F1 and rallying, car racing is as boring as watching yatching.
So tell Mr Dick Splash that

He's only pursuing the argument because he feels so inadequate in his tin top when he sees a freedom loving motorcyclist

[ducatilover]

I could be arsed. For Pukekohe, the production superbikes are a smidgeon quicker than the Porche GT3's. Both in the mid to low 58's for the rounds I looked at. Couldn't see any times for the V8 supercars. Are the GT3's quicker?

the gt3's are more than likely quicker through the corners and they are probably as fast as the v8s on the straights.

if this guy thinks v8s are so fost he can pick any hsv/fpv pref hsv cos they're faster, and my bros650 will beat it to 160. it does 160 in the same amount of time that the uk version of the hsv [they have an optional supercharger that boosts them to 560 odd hp] with the supercharger can. and my bros will sound better too

[NhuanH]

those at Phillip Island ('The Island' to those who have been ) may recall over the PA:
"....and when Murph heard the speed trap figures of Careless Chucka on the Duc of 332km/h, his reaction was FAAARK!"

So there. Bikes better than tintops. Enough to astonish a professional V8 pilot. Times/physics/whatever, doesn't matter. It is a much more gladiatorial pursuit. 300km/h+ with just 1.3mm of dead kangaroo between you and tarmac/kitty litter/tyre wall/spectators. That's well hard, innit?

Biff, edumacate your unsophisticated mate with the "Faster" DVD...

[TonyB]

Here's a thought. Can we find a bike with roughly the same power to weight ratio as a Formula Ford? They have no wings etc, so I guess they have no down force- tho they may use 'ground effect' although I have a feeling that ground-effect-only areodynamics was banned. The point being you would have a good comparison between a car and a bike, with no wings etc to give one or the other an unfair advantage.

[sAsLEX]

Here's a thought. Can we find a bike with roughly the same power to weight ratio as a Formula Ford? They have no wings etc, so I guess they have no down force- tho they may use 'ground effect' although I have a feeling that ground-effect-only areodynamics was banned. The point being you would have a good comparison between a car and a bike, with no wings etc to give one or the other an unfair advantage.

and only let it run with two wheels .........

[Mental Trousers]

If power to wieght ratio were the same for a car and a bike, I'd bet on the car no question. Problem there is, you neutralize the bikes advantage but only 1 of of the cars, not contact patch and roll stability.

[onearmedbandit]

Pixie, did I read your post correctly? F1 being interesting to watch?

[Biff]

Invite him out to ruapuna. Best time wins.

I did offer him a chance to prove his case, but he doesn't know anyone that would loan him a V8. Any offers....?

I'll show him the evidence kindly donated here to him tomorrow.

Thang q guys.

I see this brought up alot, can you tell me why a 125GP bike can corner faster than a MotoGP when it has narrower tyres? Anyone??

....physics and more general mathamatical thingies. Smaller tyre profiles/road contact area/angle of lean etc can be used in order to determine the formula required to calculate the geometric arc in which the wheels/bike takes. Slight variations in any of these variables can, in maffs terms, make a significant difference to the speed/rate of turn of any given.

And I said all that without taking a breath.

[TonyB]

Pixie, did I read your post correctly? F1 being interesting to watch?

I was thinking the same thing...

the funniest thing in F1 is the twelve tyre changers who stand carefully inspecting the tyres and then..... do nothing LOL

[sAsLEX]

I was thinking the same thing...

the funniest thing in F1 is the twelve tyre changers who stand carefully inspecting the tyres and then..... do nothing LOL

WORST RULE CHANGE EVER that one, dont have an issue with slowing the cars down reducing aero aid etc, BUT the pit stop tatics etc that were based around going for some fast laps on tires to make some ground while in a clear track etc actually made F1 bearable (especially when sky1 had certain programmes on for the adds)

but now its an even more farcical parade

[Mooch]

Had a mate with an older 255 HSV (Standard), Was doing 1:34's around manfield on a track day. So this could be the bench mark.
So for those that have trackdayed your road bikes how do your track day times compare. ? (I'm thinking 1:15-20's)

Oh and biff , an 850cc Mini 7 on the same day was doing 1:28's.