[Jason]

BIMMERPOST NEWS

BMW Driving Tutorials Series in Some M Eye Candy

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Professional race car driver Colin Turkington demonstrates a series of quick driving tips helpful on and off the track. These include launching the vehicle, controlling oversteer and understeer, maintaining a controlled slide, smooth driving and proper racing lines.


The Perfect Launch.

Smooth Driving.

Racing Lines.

Controlling Oversteer and Understeer.

Maintaining a Controlled Slide.

[PARTS@STBMW]

This is awesome, thanks for sharing!

[raysspl]

Very informative

[carlos808]

Good to see Colin from West Surrey Racing http://www.wsr-racing.com at Brands Hatch

[bd307]

Classy leather shoes with helmet driving on track

[SDPLV]

Thanks!

[xQx]

I thought with oversteer you should ease _onto_ the throttle to put more weight to the back of the car (giving the back wheels more traction) - not take your foot off the throttle, pushing weight forward & further reducing the rear grip?

[GMe90]

Awesome videos! Makes me want to go buy an M car.

[overcoil]

Originally Posted by xQx

I thought with oversteer you should ease _onto_ the throttle to put more weight to the back of the car (giving the back wheels more traction) - not take your foot off the throttle, pushing weight forward & further reducing the rear grip?

When cornering you at least maintain throttle - if you have four good contact patches while cornering and let off the gas or ease off the throttle or brake (assuming speeds and grip are great enough) then you can lose the rear end.

Once you lose rear grip at speed in a turn, what's the instinctive thing to do? let off the gas, also for some to brake, of course you don't brake because that will accentuate weight shift forward and you'll lose even more grip. But if you come off the pedals while over-steering, when you've already lost grip, you'll slow and bring back the rear grip.

That's the nice thing about front-engine rear drive. Mid-engine and rear-wheel drive are crazy, usually because when they lose grip they snap so fast.

Four wheel drive ? rules can be different.

Just to verify the technique for oversteer, research Vic Elford (Porsche Driving Handbook) his oversteer technique is called CPR, Countersteer, Pause, Recover.

[CanAutM3]

Sorry to say, but I find these to be a complete letdown

While they might be cool to watch, there is way too much marketing bling and they are far too thin on applicable information to be useful to anyone.

[CanAutM3]

Originally Posted by xQx

I thought with oversteer you should ease _onto_ the throttle to put more weight to the back of the car (giving the back wheels more traction) - not take your foot off the throttle, pushing weight forward & further reducing the rear grip?

There are two types of oversteer condition that require different types throttle input for recovery.

The first comes from forward weight transfer as a result of too much deceleration. When there is less weight on the rear wheels, they will grip less and cause the car to oversteer. This usually happens on corner entry (usually when coming in too hot). The proper recovery is indeed to add slightly more throttle to transfer weight to the rear and counter steer. "Not touching the padals" and counter steering may also work in this context and is easier and safer for the layman to execute, but it results in a less elegant recovery with much wasted lap time.

The second comes from power ovesteer as a result of too much acceleration. By applying more throttle, a greater proportion of the tire's grip in needed for forward thrust leaving less available for lateral grip yielding the rear to step out. This usually occurs at corner exit. The proper recovery for this type of oversteer is to slightly ease off the throttle and counter steer. Applying more throttle with plenty of opposite lock will turn this in a nice drift, but it is not the fastest way around a corner . Abruptly and completely lifting off the throttle here can send the car in a spin.

[CanAutM3]

Originally Posted by ScottSinger

When cornering you at least maintain throttle - if you have four good contact patches while cornering and let off the gas or ease off the throttle or brake (assuming speeds and grip are great enough) then you can lose the rear end.

Once you lose rear grip at speed in a turn, what's the instinctive thing to do? let off the gas, also for some to brake, of course you don't brake because that will accentuate weight shift forward and you'll lose even more grip. But if you come off the pedals while over-steering, when you've already lost grip, you'll slow and bring back the rear grip.

That's the nice thing about front-engine rear drive. Mid-engine and rear-wheel drive are crazy, usually because when they lose grip they snap so fast.

Four wheel drive ? rules can be different.

Just to verify the technique for oversteer, research Vic Elford (Porsche Driving Handbook) his oversteer technique is called CPR, Countersteer, Pause, Recover.

See post above.

[ssuene93]

Thanks for sharing!

[M3 Number 86]

Originally Posted by CanAutM3

Sorry to say, but I find these to be a complete letdown

While they might be cool to watch, there is way too much marketing bling and they are far too thin on applicable information to be useful to anyone.

My thought too. 1:30 second clips with about half of it for marketing intro and outro. Not gonna learn anything.

Want to learn watch my vids

They'll at minimum show you what not to do haha

[xQx]

Originally Posted by M3 Number 86

My thought too. 1:30 second clips with about half of it for marketing intro and outro. Not gonna learn anything.

Want to learn watch my vids

They'll at minimum show you what not to do haha

Link?

I agree also. Half the driving ed vids on YouTube are more advertisement than content.

I really like this guy, it's pretty straight and to the point.
https://www.youtube.com/user/speedsecrets1

[IB M]

That ZCP M4 looks so good!! Is it SO or a custom red?

[xQx]

Originally Posted by CanAutM3

There are two types of oversteer condition that require different types throttle input for recovery.

The first comes from forward weight transfer as a result of too much deceleration. When there is less weight on the rear wheels, they will grip less and cause the car to oversteer. This usually happens on corner entry (usually when coming in too hot). The proper recovery is indeed to add slightly more throttle to transfer weight to the rear and counter steer. "Not touching the padals" and counter steering also works in this context and is easier and safer for the layman to execute, but it results in a less elegant recovery with much wasted lap time.

The second comes from power ovesteer as a result of too much acceleration. By applying more throttle, a greater proportion of the tire's grip in needed for forward thrust leaving less available for lateral grip yielding the rear to step out. This usually occurs at corner exit. The proper recovery for this type of oversteer is to slightly ease off the throttle and counter steer. Abruptly and completely lifting off the throttle here can send the car in a spin.

Thanks! That's a great explanation and a perfect summation of what I've been taught.

Originally Posted by ScottSinger

When cornering you at least maintain throttle - if you have four good contact patches while cornering and let off the gas or ease off the throttle or brake (assuming speeds and grip are great enough) then you can lose the rear end.

Once you lose rear grip at speed in a turn, what's the instinctive thing to do? let off the gas, also for some to brake, of course you don't brake because that will accentuate weight shift forward and you'll lose even more grip. But if you come off the pedals while over-steering, when you've already lost grip, you'll slow and bring back the rear grip.

That's the nice thing about front-engine rear drive. Mid-engine and rear-wheel drive are crazy, usually because when they lose grip they snap so fast.

Four wheel drive ? rules can be different.

Just to verify the technique for oversteer, research Vic Elford (Porsche Driving Handbook) his oversteer technique is called CPR, Countersteer, Pause, Recover.

Four wheel drive is easy - if you're understeering you throttle off or brake to transfer weight to the front, if you're oversteering you plant the right foot, point the steering wheel where you want to go and keep your eyes on the horizon in the middle of the opening. Most (okay, Subaru) 4WD's have a tenancy for understeer, so if you've got oversteer, rejoice - you've got your trail-breaking right. I've got years of experience with these things and love them - but you can't buy a WRX as a convertible. (So, I'm relearning with RWD)

So, I think @CanAutM3 sums it up - most of the time that you're in an oversteer situation with a rwd, it's because you've done too much breaking into the apex (or onto the apex) or too much power out - so ease off. Thus it's very rare that you're correct response would be to add throttle. But the correct response is to transfer weight backwards.

So I guess the _only_ time you would want to add throttle is if you're coasting around a corner and the car oversteers - which might not be as rare a situation for Rear-engine RWD as it is for ... well, basically any front-engine car not specifically balanced to dial-out all it's understeer.

Please state any disagreement

Okay, so now I have a quite Off-topic question - why are so many expensive & coveted race & high-performance street cars mid or rear engined? Sure, they're fast, and probably better balanced - ie. faster around corners - but so much less forgiving when you find the limit. Isn't it like the difference between having one set of tyres that will let you pull 1G around a corner but gradually let go and give you a chance to recover vs. a set of tyres that will pull 1.2G around a corner, but when they let go they're gone - you're on the forums with a 'write-off part-out for sale' thread. ... I'd be choosing the former. The old adage - "To finish first, first you've got to finish".

So why the enthusiasm for rear engine?

[M3 Number 86]

Originally Posted by xQx

Link?

I agree also. Half the driving ed vids on YouTube are more advertisement than content.

I really like this guy, it's pretty straight and to the point.
https://www.youtube.com/user/speedsecrets1

Ross Bentley speed secrets is awesome. I think he posts on here too but it may have been a while. My vids are just track day vids with a ton of mishaps and shenanigans. Link in my sig or YouTube.com/pkim1079

[xQx]

Originally Posted by M3 Number 86

Link in my sig or YouTube.com/pkim1079

Thanks!

[Bamaben]

50% of each video is wasted on intro crap like has been said. Then the actual demo doesn't show much to learn from. Couldn't this have been all in one video ?