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-   -   What went wrong here? (http://986forum.com/forums/showthread.php?t=50121)

scottvd 01-02-2014 12:21 PM

What went wrong here?
 
Disclaimer: I'm super new to MT and driving anything with more power than a 2000 Subaru Forester. :o

Second day of driving my Box I did EXACTLY what this guy did while making a left hand turn (driving hard obviously). What went wrong? I think I lost traction when I shifted into second while turning or something? Came close to wrecking - wound up 180 in wrong direction finally stopped next to the other cars turning left in the opposing target lane.. Super embarrassing too! :confused:

BYprodriver 01-02-2014 12:39 PM

I did not watch the video but sounds like you upset the balance of the car mid-turn. If downshift to a lower gear that excessively raises rpms when you reengage the clutch, it's known as "engine braking" & has same effect as pulling the hand parking brake.
As you prepare to enter a turn complete all braking & shifting while the car & steering wheel are pointing straight. This allows you to go slower into the turn & faster out, which is the fastest overall strategy & incidentally safer if that's important to you.Get you & your Box out to a autocross where you can practice car control while only risking killing some cones. Boxster is one of the best street vehicles ever made to do what you direct it to do. Unfortunately if you give the wrong directions it follows those also without prejudice. ;)

demick 01-02-2014 12:54 PM

You are driving a rear wheel drive car with a decent amount of power. If you apply too much power during a turn, you can break the rear tires loose and lose traction. When this happens, the back end will step out. If you don't know how to correct for it, the rear end will come around and you will spin out, which is what happened to you.

As BYprodriver said, time to learn some car control.

Perfectlap 01-02-2014 01:19 PM

I spun my Boxster in the first week. At that time I was in my third season of autocross, previous car was FWD.
If there's any moisture on the ground and you're sloppy with the throttle it can break loose without warning.
The one downside to mid-engine car...the whole polar inertia thing...

jacabean 01-02-2014 01:33 PM

Quote:

Originally Posted by Perfectlap (Post 379280)
I spun my Boxster in the first week. At that time I was in my third season of autocross, previous car was FWD.
If there's any moisture on the ground and you're sloppy with the throttle it can break loose without warning.
The one downside to mid-engine car...the whole polar inertia thing...

it's a lot worse in the 911 .

alanqning 01-02-2014 01:43 PM

I spun out on a Boxster test drive accelerating slightly in a left turn from a stop in rain, all this in the middle of downtown Chicago and ending up backwards.

I knew about apexes, when to slow down and accelerate but was still surprised I broke traction. Never drove a Mid Rear engine before though, I thought they would have more traction in the rear due to the weight being there.

scottvd 01-02-2014 01:44 PM

Thanks for the input - next step is to find somewhere local to get some training. I'm about 1:45 away from Sonoma Raceway.

patssle 01-02-2014 02:52 PM

Quote:

If you apply too much power during a turn, you can break the rear tires loose and lose traction
If I apply almost any power during a turn...my rear end gets sloppy. And I've done some autocrosses before so I have a little experience - but it's perplexing why it's always doing it even with just medium power applied on dry even roads. Tires are Michelin pilot super sport and in great shape.

RaisedOnPorsches 01-02-2014 03:34 PM

First off wow, the guy driving the Porsche at about 7:40 in that video... If it ain't broke enough, keep driving it so it brakes more! That must have been a police chase.

Anyhow, I spun my Boxster at my first DE at Thunderhill. I was entering a sharp left turn and downshifted too early into 2nd gear. Traction broke and the whole car went for a spin. No damage and no harm thankfully, but I certainly learned where the limit is on how hard one can turn in these cars. This was about three months into owning my Boxster.

I recommend taking it to a safer track list Thunderhill where there is nothing but green on most sides of the track, rather than Sear's Point where there are lots of tires and guard walls to slam into. AX is another great option for learning the ropes on your P-car.

TeamOxford 01-02-2014 04:20 PM

Quote:

Originally Posted by scottvd (Post 379262)
Disclaimer: I'm super new to MT and driving anything with more power than a 2000 Subaru Forester. :o

Came close to wrecking - wound up 180 in wrong direction finally stopped next to the other cars turning left in the opposing target lane.. Super embarrassing too! :confused:

Seriously dude, take an advanced drivers course.

And always drive with your second most favorite organ.................not your first.

TO

thstone 01-02-2014 04:24 PM

You tried to turn and accelerate at the same time beyond the limit of rear tire traction. In other words, you broke the rear tires loose by accelerating hard in a corner.

Then, once the car started to rotate beyond the turn, you got behind in your steering and did not react fast enough to "catch it". Net result, you spun it around.

Nothing that a few track days can't teach. :)

And the 911 isn't worse, it is just "different". The Boxster rotates much easier and faster but is generally easy to catch using a majority of steering inputs. That's why people say that its "easier" to drive at the limit. But you need quick hands in a Boxster or you'll spin.

On the other hand, the 911 rotates more slowly but that rear end has a lot of momentum so it takes a lot more effort/skill to halt the rotation and reverse it and usually requires both steering and throttle inputs to do it right (which is technically more difficult than just steering alone).

keysguy 01-02-2014 04:31 PM

Quote:

Originally Posted by jacabean (Post 379283)
it's a lot worse in the 911 .

Truer words we not spoken....I haven't spun my Boxster...yet but my old 911 used to love to swap ends. God help you in the rain.

BYprodriver 01-02-2014 04:57 PM

Quote:

Originally Posted by scottvd (Post 379262)
Disclaimer: I'm super new to MT and driving anything with more power than a 2000 Subaru Forester. :o

Second day of driving my Box I did EXACTLY what this guy did while making a left hand turn (driving hard obviously). What went wrong? I think I lost traction when I shifted into second while turning or something? Came close to wrecking - wound up 180 in wrong direction finally stopped next to the other cars turning left in the opposing target lane.. Super embarrassing too! :confused:

Just saw your intro post, does your 2004 have PSM switch in center of the dash?

san rensho 01-02-2014 05:08 PM

Quote:

Originally Posted by BYprodriver (Post 379269)
I did not watch the video but sounds like you upset the balance of the car mid-turn. If downshift to a lower gear that excessively raises rpms when you reengage the clutch, it's known as "engine braking" & has same effect as pulling the hand parking brake.
As you prepare to enter a turn complete all braking & shifting while the car & steering wheel are pointing straight. This allows you to go slower into the turn & faster out, which is the fastest overall strategy & incidentally safer if that's important to you.Get you & your Box out to a autocross where you can practice car control while only risking killing some cones. Boxster is one of the best street vehicles ever made to do what you direct it to do. Unfortunately if you give the wrong directions it follows those also without prejudice. ;)

In addition to the good advice a bout about braking and downshifting before the corner, you have tu understand WHERE in a turn you can apply hard throttle.

Every turn consists of two phases, the first, when you turn the steering wheel in and the second when you unwind thenwheel the wheel back to center. Any hard application of throttle as you are turning in and you will spin. That's what you see most of the guys in the video doing.

Now, as you start to turn the wheel back to center you can apply increasing amounts of throttle all the way to full throttLe, as you come closer and closer to getting the steering wheel back to center.

Try this. Go to a safe parking lot on a wet or snowy day and as you make a slow speed turn, around 25-30 mph, hit the gas hard as you turn the wheel. You will spin. Do the same turn but this time, wait until you are unwinding the wheel and progressivel hit the gas hard as you keep unwinding the wheel. The rear tires will spin up but the car will not spin, ,you will exit the corner with the car perfectly straight, in control and the whole maneuver should not should not induce panic at all, in fact, once you get the hang of it, it's a blast. Be safe.

scottvd 01-02-2014 05:48 PM

Quote:

Originally Posted by RaisedOnPorsches (Post 379305)
I recommend taking it to a safer track list Thunderhill where there is nothing but green on most sides of the track, rather than Sear's Point where there are lots of tires and guard walls to slam into. AX is another great option for learning the ropes on your P-car.

Cool, thanks for the advice with Thunderhill- I'll check into that!

scottvd 01-02-2014 05:52 PM

Quote:

Originally Posted by BYprodriver (Post 379316)
Just saw your intro post, does your 2004 have PSM switch in center of the dash?

No, don't have the PSM option on this Box. :/

scottvd 01-02-2014 05:56 PM

Thx San rensho, byprodriver, and thstone for the insight!

alanqning 01-02-2014 08:13 PM

Quote:

Originally Posted by TeamOxford (Post 379309)
Seriously dude, take an advanced drivers course.

And always drive with your second most favorite organ.................not your first.

TO

I don't think I can drive with my liver.

Nine8Six 01-02-2014 09:12 PM

Quote:

Originally Posted by alanqning (Post 379347)
I don't think I can drive with my liver.

Can someone please acknowledge this was way too funny. Or am I the only one loosing it here.... I almost pissed my pants after reading this

(off to work... can't stick on this forum... hurts)

Tucker2 01-02-2014 09:14 PM

Honestly.....where you are at now....go to your local indoor/outdoor carting place and spend some money. Learn about what it feels like to loose and gain control in a very safe environment. It's a place where you can drive *as fast as you can* and not cost yourself and arm and a leg if something goes wrong. You need to learn the fundamentals of car control. You're driving a Porsche. Respect that.

My own '02 BS is having issues with cold weather where the PSM goes to sleep until the car is warm. I thought the warning light was a bunch of BS. I was wrong. Came around a nice fun corner in the wet last weekend and gunned it and I lost the car. It took me *spinning* the wheel...not a correction...but full on spinning the wheel once in each direction until I managed to get her under control....right as I came into view to a police car. Oye. Lesson 1032 learned in life.

Learn car control. It's a biggie.

rfuerst911sc 01-03-2014 02:09 AM

Join your local PCA or SCCA and run as many autocross events as you can. Great way to learn car control, improve as a driver and meet some great folks. Usually at the PCA events there are instructors that can REALLY help you learn your cars limits. Don't take this the wrong way but just your asking on this forum what happened tells me you are NOT ready to go out on a road course at high speed. Get as many AX's under your belt at relatively slow speed and learn your car, suspension, brakes and tires plus yourself ! Then go out and get on a road course. Ultimately the goal is to have fun, be safe, become a better driver and above all return home in one piece :D

Frodo 01-03-2014 04:27 AM

Don't know how chilly it gets in Oakdale, CA, this time of year, but if you're riding on summer performance tires, temperature can definitely be a factor as well. When shopping for tires on tirerack.com, with these tires you'll typically note the warning: "Like all summer tires, it is not intended to be driven in near-freezing temperatures, through snow or on ice."

I learned this lesson the hard way going out to grab some take-out. It was cool, low-40s or high 30s, which generally hadn't been a problem for me---I knew to take it a bit easier under such circumstances. This time, however, it started to rain gently shortly after I left home. Cold + Wet + summer performance tires is a REALLY bad combo! :eek:

Perfectlap 01-03-2014 09:06 AM

Quote:

Originally Posted by jacabean (Post 379283)
it's a lot worse in the 911 .

well maybe with the antique 911's. With the modern 911's (964 onwards) you get much more of a heads up when you're gonna swap ends. With the Boxster, when it spins, it spins, by the time you realize the rear's broken loose... too late.
And the spin itself is not like a pendulus 911 spin where you end up on the side of the road. More like a top pulled from a string.

I'm glad I spun it that first week of ownership it made me respect that the throttle and take it EASY when the ground was damp and cold.

scottvd 01-03-2014 10:14 AM

Quote:

Originally Posted by rfuerst911sc (Post 379363)
Join your local PCA or SCCA and run as many autocross events as you can. Great way to learn car control, improve as a driver and meet some great folks. Usually at the PCA events there are instructors that can REALLY help you learn your cars limits. Don't take this the wrong way but just your asking on this forum what happened tells me you are NOT ready to go out on a road course at high speed. Get as many AX's under your belt at relatively slow speed and learn your car, suspension, brakes and tires plus yourself ! Then go out and get on a road course. Ultimately the goal is to have fun, be safe, become a better driver and above all return home in one piece :D

^ ya I need the 101 course for sure. Been reading through the "What I learned on the track" sticky, that's helpful too. An acquaintance of mine is really involved with SCCA - he just told me about it yesterday and said I should join. Thx for the input! (:


Quote:

Don't know how chilly it gets in Oakdale, CA, this time of year, but if you're riding on summer performance tires, temperature can definitely be a factor as well. When shopping for tires on tirerack.com, with these tires you'll typically note the warning: "Like all summer tires, it is not intended to be driven in near-freezing temperatures, through snow or on ice."
For sure - thanks - good thing to keep in mind. Temperatures are about 35 at night and 65 during day right now, dry. I'm not even sure what tires I have on, PO said they were same as the "stock" tires that came with the car. Thx again.

Mark_T 01-03-2014 10:21 AM

This hasn't been my experience with the Boxster at all. There have been a couple of times when I have got on the gas too soon coming out of a corner or cloverleaf and the back end has come loose. A slight lift, a quick counter-steer, and it snaps back to straight again, ready for the throttle. I've never had a car that corrects from an oversteer slide as smoothly and easily as this one. Maybe this is because I am running Michelin Pilot Sport A/S Plus tires, although they are 5 seasons old and getting pretty hard.

BYprodriver 01-03-2014 10:50 AM

Quote:

Originally Posted by Mark_T (Post 379410)
This hasn't been my experience with the Boxster at all. There have been a couple of times when I have got on the gas too soon coming out of a corner or cloverleaf and the back end has come loose. A slight lift, a quick counter-steer, and it snaps back to straight again, ready for the throttle. I've never had a car that corrects from an oversteer slide as smoothly and easily as this one. Maybe this is because I am running Michelin Pilot Sport A/S Plus tires, although they are 5 seasons old and getting pretty hard.

+1
Boxster is one of the best street vehicles ever made to do what you direct it to do. Unfortunately if you give the wrong directions it follows those also without prejudice.

All modern vehicles are designed to go straight thru steering axis inclination & proper castor settings. Therefore the moment I feel I have lost control I release my grip on the steering wheel allowing it to spin freely between my hands til it self centers & the car is going straight again. Now I can make minimal steering input to regain intended direction of travel.

CoBeerToad 01-03-2014 12:07 PM

Quote:

Originally Posted by Nine8Six (Post 379356)
Can someone please acknowledge this was way too funny. Or am I the only one loosing it here.... I almost pissed my pants after reading this

(off to work... can't stick on this forum... hurts)

It sure was.

woodsman 01-03-2014 12:34 PM

Quote:

Originally Posted by scottvd (Post 379327)
No, don't have the PSM option on this Box. :/

I thought PSM became standard in 2002???

BYprodriver 01-03-2014 12:38 PM

Quote:

Originally Posted by woodsman (Post 379428)
I thought PSM became standard in 2002???

Option starting in 2000. One of the reasons a DME upgrade was required.

jacabean 01-03-2014 12:56 PM

Quote:

Originally Posted by thstone (Post 379310)
You tried to turn and accelerate at the same time beyond the limit of rear tire traction. In other words, you broke the rear tires loose by accelerating hard in a corner.

Then, once the car started to rotate beyond the turn, you got behind in your steering and did not react fast enough to "catch it". Net result, you spun it around.

Nothing that a few track days can't teach. :)

And the 911 isn't worse, it is just "different". The Boxster rotates much easier and faster but is generally easy to catch using a majority of steering inputs. That's why people say that its "easier" to drive at the limit. But you need quick hands in a Boxster or you'll spin.

On the other hand, the 911 rotates more slowly but that rear end has a lot of momentum so it takes a lot more effort/skill to halt the rotation and reverse it and usually requires both steering and throttle inputs to do it right (which is technically more difficult than just steering alone).

different , more like scary compared to the boxster . the driving i have done in my boxster I would not dare too do in the 911 . I am also not very experienced driving a 911 either .

Perfectlap 01-03-2014 01:01 PM

Quote:

Originally Posted by scottvd (Post 379408)
^ ya I need the 101 course for sure. Been reading through the "What I learned on the track" sticky, that's helpful too. An acquaintance of mine is really involved with SCCA - he just told me about it yesterday and said I should join. Thx for the input! (:

Autocross is much more useful in terms of real world driving. The mix of layouts is limited due to the size of lots and after about a dozen events you've pretty much seen everything you're going to see: six pin, four pin, three pin, left, right, slalom, Chicago box, haripin, no pin... you get the point.
While on a road course you're learning to be smooth with long pauses (straights) in between. With autocross you're trying to get from A to B as quickly as possible while upsetting the balance of the car as little as possible...as Randy Pobst (professional driver who is a big autocrosser) once said "its basically connecting a series of power slides". Sometimes smoother is better sometimes its not because you don't have a long straight to make up deficit. But the point is that most real-world situations where you need to save your hide will more closely resemble something you've done a hundred times in autocross than nailing the esses at your local track. And because of the number of turns and corners are so much higher in autocross you learn to manage the brake with much more practice. One of the great things about autocrossing the Boxster is that you see that this isn't a "just a cheap Porsche" but perhaps the best braking paired with the most neutral handling you can get out of any road car no matter the price. When people talk down this car right away I know they don't know much about actual driving. Most of the time they just know plenty about buying cars.

The next best thing is to do some karting. Find an "arrive and drive" place near you. This will help you "see the course", I think driving is more about what you do with your eyes than what you do with hands and feets. Everything follows from the eyes. Plus you'll get more seat time than in autocross or that once in a while track day. I was karting before I could ride a bicycle. Those were the days, someone else paying for your fun...

evan9eleven 01-03-2014 02:37 PM

Quote:

Originally Posted by Nine8Six (Post 379356)
Can someone please acknowledge this was way too funny. Or am I the only one loosing it here.... I almost pissed my pants after reading this

(off to work... can't stick on this forum... hurts)

+1... though my liver would probably consider itself "most abused" organ and not "second favorite." :cheers:

stephen wilson 01-03-2014 03:28 PM

Quote:

Originally Posted by BYprodriver (Post 379414)
All modern vehicles are designed to go straight thru steering axis inclination & proper castor settings. Therefore the moment I feel I have lost control I release my grip on the steering wheel allowing it to spin freely between my hands til it self centers & the car is going straight again. Now I can make minimal steering input to regain intended direction of travel.

I've done that when I need to take steering out quickly when "snapping back" after counter-steering for a slide, I think that's what you mean? I'm sure you can't just let go when the tail steps out.

Scott, were you shifting from 1st to 2nd while turning, or from 3rd to 2nd?

TeamOxford 01-03-2014 03:45 PM

AXs and DEs are great for getting seat time; for learning a course or a new car. They will NOT erase incorrect driving techniques.

IMHO, it's best to learn proper high speed driving techniques from a qualified instructor.

Once one learns the basics, then any further driving events aid the driver in mastering these techniques.

And just to be CLEAR, drive with your brain..................

TO

p.s. I thought alangning's post was a hoot! :D

stephen wilson 01-03-2014 04:48 PM

I also think some reading is mandatory. You have to understand the physics that define how a car responds to your inputs.

LAP1DOUG 01-03-2014 05:24 PM

Lots of good advice here. I would strongly recommend learning at on an auto-x course where the consequences of a spin "usually" aren't that bad. When you get to the point where you are intensionally shifting weight to the front to start rotation, and then catching it with throttle application to shift weight rearward, you have arrived.

That said, you should have alignment checked to make sure nothing is off. Make sure you have at least zero toe to slight toe-in at the rear, otherwise it can be very twitchy. Also make sure the rear camber is good. I like to run about -2.5 degrees at the rear. Make sure nothing is binding with the sway bar that would make the spring rate suddenly go up, and finally check that the tires have decent tread matching front to rear. Some tires (Dunlop ZI's for instance) are noted for loosing traction when they get to the very end of their tread life.

scottvd 01-04-2014 11:59 AM

Quote:

Originally Posted by stephen wilson (Post 379462)
I've done that when I need to take steering out quickly when "snapping back" after counter-steering for a slide, I think that's what you mean? I'm sure you can't just let go when the tail steps out.

Scott, were you shifting from 1st to 2nd while turning, or from 3rd to 2nd?

Tons of good input here, thanks again everyone. I was shifting from 1st to 2nd. I had taking 1st up to circa 6400rpm, shift to second came just when I was really engaging the steering wheel for the turn.. :o

haz 01-04-2014 12:09 PM

Quote:

Originally Posted by scottvd (Post 379561)
Tons of good input here, thanks again everyone. I was shifting from 1st to 2nd. I had taking 1st up to circa 6400rpm, shift to second came just when I was really engaging the steering wheel for the turn.. :o

Oooh... recipe for disaster there. Why rev up to as high as 6400 at all when planning on turning the steeringwheel AND shifting up? You were basically asking for it, sorry. Luckily no damage, right?

scottvd 01-04-2014 01:10 PM

Quote:

Originally Posted by haz (Post 379562)
Oooh... recipe for disaster there. Why rev up to as high as 6400 at all when planning on turning the steeringwheel AND shifting up? You were basically asking for it, sorry. Luckily no damage, right?

^ ya - no damage. Mostly good came from this - because it was close to damage.. you know those near death experiences when everything slows down and there's an amazing sense of clarity.. it wasn't near death or anything but it did feel like time was about 10% normal speed and I had complete recognition of what was happening: "Second day with my car and here we go, going to wreck into the side of that pickup."

So it was close enough to totally get my attention - RWD is nothing like my AWD subbie! (: ;)

pharaohjb 01-04-2014 01:41 PM

True... if you think about what you did:

1. Fast acceleration - presuming you're at 6400 rpm, you're near redline, and likely got there pretty quickly. ;) Physically, that throws a lot of weight onto the rear tires (where it should be for good traction in a RWD car).
2. Upshifting - you've now thrown the weight OFF of the back tires as there's less acceleration. Not as bad as braking, but you now don't have the same force pushing down on the rear tires.
3. Turning the wheel - you've also now got a bit MORE grip on the fronts since you've upshifted and shifted the weight off the rear tires.


Hitting the accelerator again in this state is a recipe for disaster. Not only will the rear end break loose easier when you hit the throttle, the additional grip the fronts have will send you spinning easier, since they're not pointed in a straight line.

That's my estimation, anyway. Those with more track experience, feel free to correct me! :)


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