I think it's mainly because there is so much vibration in the front (engine), and some drivers take curbs really aggresively there, that it's plausible that the brake "things" (that clamp against the disc face, me bad english) are not completely in the right position, even if it's only 1/1000th of an inch.
That tiny inperfection needs some time to correct itself again when the driver hits the pedal, which means that the car has a f*cked up brake bias (towards the back) for a short while.

That's why they do this, or this is what I was told.

A 'good' brake disc is likely to be slightly imperfect, and these imperfections push the pad away from the disc - perhaps 0.004" is a common disc-pad running clearance. Add to this the throw-back from hitting kerbs (engine vibration won't have any effect) and you could end up with about 0.015" (~0.35mm) disc to pad clearance.

Yeah, engine vibration was stupid thing to say, seeing as there is a suspension between the engine and brakepads

It can also be partly a confidence thing, just to feel if there is brake pressure. I'm sure that there are some racers who just check that if they had a severe crash because of failing brakes.

But thanks tristan for giving some numbers, so we can kinda visualize it more.

knockback

Quote from kaynd :

knockback

Great page kaynd, thanks

Does someone know any sites that have v8 supercar races on them? The site where I downloaded the first 4 races from suddenly doesn't have any seeders anymore, and I'd very much like to see the whole 06 seasons before the 07 season starts.

Quote from mikey_G :

Does someone know any sites that have v8 supercar races on them? The site where I downloaded the first 4 races from suddenly doesn't have any seeders anymore, and I'd very much like to see the whole 06 seasons before the 07 season starts.

http://www.racing-underground.com

or did you already mean this site...

Not any professional driving or anything, but this video is pretty fun to watch. This is the video that got me really into sprinted touge driving. Makes me wanna move out of flat old south florida.

Its a bone stock USDM S13 (240sx), btw. For those of you in other countries, the 180sx.

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

The guy isnt bad at enthusia, either.

http://www.youtube.com/watch?v=BBnu_hc0kpU

Quote from Sketchyrollin564 :

Its a bone stock USDM S13 (240sx), btw. For those of you in other countries, the 180sx.

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

Can't find any good about racing on public roads.

Quote from Niels Heusinkveld :

I am watching that video daily and yes it DOES appear he's using slicks! That explains the wheelspin in all gears.. Surprisingly controllable though even with wheelspin!

He isn't on slicks, he's on fully treaded wet tyres. I took a screenshot from it (one of the few F1 DVDs I legally own ), it's difficult to see the tread in this low resolution image but it's definitely there. It's a particularly impressive display of driving, of course, but if he were on slicks he'd be in the wall about 2 seconds after leaving the pits.

ripped another vid from a v8 supercar race. This one shows Greg Murphy at work who is a left foot braker (which is rare in v8s) and doesn't use the clutch at all.
This might be useful for people who drive in the higher stcc servers, where throttle blipping has to be done manually.

http://www.youtube.com/watch?v=azpqTZ6WeJk

Quote from mikey_G :

ripped another vid from a v8 supercar race. This one shows Greg Murphy at work who is a left foot braker (which is rare in v8s) and doesn't use the clutch at all.
This might be useful for people who drive in the higher stcc servers, where throttle blipping has to be done manually.

http://www.youtube.com/watch?v=azpqTZ6WeJk

Reminds me of (or at, what's correct?) this video:
http://www.youtube.com/watch?v ... ;mode=related&search=

Quote from Polaxis :

Reminds me of (or at, what's correct?) this video:
http://www.youtube.com/watch?v ... ;mode=related&search=

Yeah, that's one perfect lap

Thanks for that AMp88.. I sort of reconsidered it myself as it should've been a boat with those conditions and no grooved tyres.

I should get that DVD; car pron is always better at high res

A bunch of "looking backwards" dragster videos. Turn down the volume if you like, because these vids are LOUD!!

Wing struts: http://www.youtube.com/watch?v=EKIx4_0KsvA
Blower belt: http://www.youtube.com/watch?v=54NwPdSxTNA
Nose: http://www.youtube.com/watch?v=67xQuwwTNww

Here's also a general in-car view dragster clip: http://www.youtube.com/watch?v=hD4Z2upWS4o
Wing struts (forwards): http://www.youtube.com/watch?v=4zoBkJM3LtU

Looks like you have chance to get 2 copyright notices (=video deletions) from youtube. Just got my third one and whole account and all uploaded videos were deleted. Well can't really complain because laws are laws... creating a new account is no problem of course but the previous email address is permanently banned.

http://videos.streetfire.net/p ... BC-4082-A493-692B102901E3

Custom designed and built car with a V10 Cosworth F1 engine in the back. Awesome looking machine, saw it back in 2005 although it was only on display. Unfortunately the F1 engine is proving too temperamental and I think he is swapping it for a DTM spec engine.

My Dad knows Graeme fairly well, helped fix up his Hillman Imp after he had a serious accident in it. He had just replaced the camshaft and was testing it out on the public roads when a brake pipe burst as he was heading into a tight corner. The car launched up a banking, flew through the air and landed square in the field. I'm sure he broke the seat (remember this is a race prepared car), seat wasn't designed to take such a load downwards. He was told he may never walk again when in hospital. He still walks with a limp but he has gone on to be double British Hillclimb champion and I think he won the 2003 Goodwood festival of speed.

Graham would say: "Its got some poke!"

http://www.youtube.com/watch?v ... ;mode=related&search=

Wow, I never knew this footage existed; '67 GP at Monza.
Brings back sweet, sweet memories of GPL...

http://www.youtube.com/watch?v ... ;mode=related&search=

http://www.youtube.com/watch?v=ZQQ6rOUPgVc

Traktor GTI =)
http://www.youtube.com/watch?v=DapHhgnm6CQ

nice onboard footage of yesterdays v8 supercar race in adelaide:
http://www.youtube.com/watch?v=LfOTGVpcyV8

edit:
Some older footage of Mark Skaife which got deleted on youtube :S
http://youtube.com/watch?v=g4xyTHsPFfk


And some footage of Montoya in last weekends race in Mexico City:
http://youtube.com/watch?v=P1VFgDisBtc

Hopefully this is enough now for the pedal technique junkies

Porsches..

http://www.youtube.com/watch?v=8CfiaZUl10k

That driver seems to agree with me that the proper way to drive a porsche is power oversteer..

And I never saw it look so slow and easy as here, its an older model probably with <300hp..
http://www.youtube.com/watch?v=-kclhHNlpPY


Now that I'm on a roll, this guy seems to be no Tiff but it looks doable! Note the absolute lack of 'snap back'.
http://www.youtube.com/watch?v=-wdWAP-UIxk

Look! even a posh italian guy can do some of it!
http://www.youtube.com/watch?v=2IcmqnlcCmk

Another, well, it looks like he is about 3 feet tall, or the codriver is a giant, but that wouldn't fit in the car so small people can slide a little too, even in a GT3
http://www.youtube.com/watch?v=H8J3vWllZl8


I think we saw his fingers before..
http://www.youtube.com/watch?v=Xi-XI_j8m_w

Tiff I mentioned him sometime before.. Between the useless 'car vs helicopter' crap you will see some smoke.. and its not from the helicopter!
http://www.youtube.com/watch?v=1Ao1sfJCEBM

He seems to be clearly the best driver of these vids, together with the german test driver of vid nr 1!

tiff is great but that helicopter..wow that's some awersome skill. And the good thing is it actually follows the track quite nicely instead of cutting every corner.

Young Tiff in a Group C Porsche 962 at Silverstone. (35 MB)



http://rapidshare.com/files/21 ... Silverstone_Test.avi.html

Enjoy.