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-   -   911 rear end slide out. what speed ?? (http://forums.pelicanparts.com/porsche-911-technical-forum/1172760-911-rear-end-slide-out-what-speed.html)

Alan L 01-27-2025 10:20 AM

Quote:

Originally Posted by winders (Post 12397725)
Anything resembling "slow in" is NOT the quickest way around the track.

What seems to have been missed is this;

"Slow in, fast out is also the quickest way around the track.
Of course the definition of 'slow in' may need some amplification "
I was trying to avoid going any further with that regarding track vs road, since it was straying off course from the OPs topic.
I suspect we don't disagree what that looks like - more a Q of terminology.
Alan

David Inc. 01-27-2025 11:23 AM

Quote:

Originally Posted by Bill Douglas (Post 12399034)
Oh Jeezus David, I feel car sick driving with you LOL

Hey if the car isn't moving all over the place you're not going fast enough! :D

Really it's the helmet cam that makes it like that. It looks a lot more exciting than the video from the phone in the windshield though.

Quote:

Originally Posted by pmax (Post 12399037)
That's a nice track, even better when it looks like he has it all to himself, no other cars !

Blessing and a curse, it was sub 40F at the start of the day and I think a lot of people decided to skip the day. It was asking a lot of summer tires, that's for sure.

winders 01-27-2025 12:02 PM

Quote:

Originally Posted by winders (Post 12397725)
Anything resembling "slow in" is NOT the quickest way around the track.

Quote:

Originally Posted by Alan L (Post 12399051)
What seems to have been missed is this;

"Slow in, fast out is also the quickest way around the track.
Of course the definition of 'slow in' may need some amplification "
I was trying to avoid going any further with that regarding track vs road, since it was straying off course from the OPs topic.
I suspect we don't disagree what that looks like - more a Q of terminology.

Nothing was missed. You specifically said "the quickest way around the track".

Often the fastest way through a particular section of track has the corner entry faster than the corner exit. Also, the whole idea is to enter the corner as fast as you can without compromising overall speed through the section of track containing the corner. So "fast as possible in and fast as possible out" given the chosen compromise for the corner.

Apex choices also affect corner entry and exit speed. People often teach late apexes which are safe. But, if used in a race, would result in a driver using the late apexes getting passed when they otherwise would/should not. I love racing against folks using late apex lines as they are so easy to pass.

Finally, when qualifying or racing, fast drivers often spend time off the throttle with the car "coasting" through a part of the corner where any throttle or brake application would not be beneficial. In other words, all the tire traction is being used and throttle or brakes would upset the balance and cause understeer or oversteer.

"Slow in, fast out" is what I see with track day guys with high horsepower cars parking it into the corners and accelerating fast down the straights getting in the way of faster lap time cars with less power.

pmax 01-27-2025 12:08 PM

Quote:

Originally Posted by David Inc. (Post 12399101)
Blessing and a curse, it was sub 40F at the start of the day and I think a lot of people decided to skip the day. It was asking a lot of summer tires, that's for sure.

Nice !
Thanks for sharing that clip.

Alan L 01-27-2025 07:39 PM

"So "fast as possible in and fast as possible out" given the chosen compromise for the corner."
I completely agree.
"Often the fastest way through a particular section of track has the corner entry faster than the corner exit."
This is new to me. Although I do have a use for this on the track - but not the way you describe it. I am always willing to learn something.
Can we continue this discussion in another thread somewhere - to save corrupting the Ops Q?
Alan

Alan L 01-27-2025 07:40 PM

"So "fast as possible in and fast as possible out" given the chosen compromise for the corner."
I completely agree.
"Often the fastest way through a particular section of track has the corner entry faster than the corner exit."
This is new to me. Although I do have a use for this on the track - but not the way you describe it. I am always willing to learn something.
Can we continue this discussion in another thread somewhere - to save corrupting the Ops Q?
Alan

Bill Douglas 01-27-2025 09:36 PM

A trick I've used is to go fast in. Passing others as they brake. The latest possible braking and trail braking into the corner. Sure coming out of the corner is fractionally slower but the other guys can't pass you at that point :)

A930Rocket 01-29-2025 06:50 PM

Not me, but somebody did a four wheel drift or lock up…

http://forums.pelicanparts.com/uploa...1738209021.jpg

MrScratch 01-31-2025 11:51 AM

Guys i don't mind if you go off topic
as it really relates to my question anyway..
so it's kind of on the same topic i think?.

Bill Douglas 01-31-2025 08:01 PM

Quote:

Originally Posted by MrScratch (Post 12401769)
Guys i don't mind if you go off topic
as it really relates to my question anyway..
so it's kind of on the same topic i think?.

Another way of looking at it is, you've got to be going like stink to slide out. Most other cars would be down the bank on it's roof before our highly superior 911s start to slide.

winders 01-31-2025 08:20 PM

Quote:

Originally Posted by Bill Douglas (Post 12401987)
Another way of looking at it is, you've got to be going like stink to slide out. Most other cars would be down the bank on it's roof before our highly superior 911s start to slide.

Most modern cars handle as well as G body 911s...

Most modern sport coupes handle much better...

MrScratch 02-01-2025 07:01 AM

Quote:

Originally Posted by winders (Post 12401998)
Most modern cars handle as well as G body 911s...

Most modern sport coupes handle much better...

man, i should have just bought a Corolla!!
i hear that our cars are slow, don't handle well, expensive to own, what's the point? lol

Bill Douglas 02-01-2025 09:45 AM

Quote:

Originally Posted by winders (Post 12401998)
Most modern cars handle as well as G body 911s...

Most modern sport coupes handle much better...

Grow up. This is a classic Porsche site. We are allowed to be biased and bigoted.

winders 02-01-2025 09:52 AM

Quote:

Originally Posted by Bill Douglas (Post 12402269)
Grow up. This is a classic Porsche site. We are allowed to be biased and bigoted.

You can identify any way you want…don’t shoot the messenger telling the truth.

Bill Douglas 02-01-2025 10:12 AM

Quote:

Originally Posted by winders (Post 12402270)
You can identify any way you want…don’t shoot the messenger telling the truth.

Don't bring logic into a debate then.

crashmy911 02-01-2025 10:34 AM

Just don't lift off the gas in a corner!!!!!

MrScratch 02-03-2025 10:19 AM

http://forums.pelicanparts.com/uploa...1738610307.jpg
so he states do not touch the pedals..
i'm assuming he means leave your feet where they are on the throttle?

HarryD 02-03-2025 11:15 AM

Quote:

Originally Posted by MrScratch (Post 12403631)
http://forums.pelicanparts.com/uploa...1738610307.jpg
so he states do not touch the pedals..
i'm assuming he means leave your feet where they are on the throttle?

You can read till the cows come home, but the real lesson is behind the wheel.

Sign up for an Autocross where you will discover you can spin your car to 30 mph and navigate a turn at 50 mph.

You do not say where you are. Depending on your location, there are many places to Autocross. PCA, Audi Club, BMWCCA and SCCA (they call is Solo) offer programs. They include instruction with a person in the passenger seat.

Many PCA (and other Marque clubs) offer a day of "Driver Skills Training". It is essentially car control school. Well worth it.

RSBob 02-03-2025 09:55 PM

Agree with directly above.

If you want to see how the car will spin, when its raining, go 15-20 MPH into a right hand turn and midway though the turn, hit the gas and see how fast the rear end comes around. Ask me how I know. You will gain immediate respect as to how fast it can happen. Now go out to a skid pad with instructors and learn your car’s limits.

RSBob 02-03-2025 09:56 PM

Agree with directly above.

If you want to see how the car will spin, when its raining, go 15-20 MPH into a right hand turn and midway though the turn, hit the gas and see how fast the rear end comes around. Ask me how I know. You will gain immediate respect as to how fast it can happen. Now go out to a skid pad with instructors and learn your car’s limits.


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