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Apr 17, 2006 12:33:21 PM

fritz: Rennteam VIP; Loc: BaWü , Germany; Posts: 7675, Gallery; Registered on: Jul 23, 2003; Reply to: FSU-997TT

Re: Forgot one other piece of information that I "learned"

Quote:
FSU-997S said:
So what we're saying is that if a 997TT TIP with incandescent brake lights and a 997TT Manual with LED lights left an intersection at the same time and then both braked at the same time, due to the distance between the two cars, and the reaction time of the LEDs - we see both brake lights at the same time?

I think that would only be the case if the driver of the Tip had accelerated to the speed of light before he put his foot on the brake.

I hope he has PCCB, because cast iron rotors might tend to fade when braking from that speed.

Do you realise that you've just caused a rumor to start over on rennlist that manual transmission 997 TTs will have LED brake lights?

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Apr 17, 2006 12:47:39 PM

W8MM: Rennteam Pro; Loc: Cincinnati, OH , United States; Posts: 2694, Gallery; Registered on: Aug 8, 2003; Reply to: fritz

Re: Forgot one other piece of information that I "learned"

Quote:
fritz said:Are we really talking about LEDs being a third of a second faster?

I would be impressed if that were the case.

Anybody have comparative figures?

Check this out from Hewlett-Packard (click me)

Excerpt: "Our research shows that
between 37% and 74% of rear-end
collisions are preventable by early
warning systems.... Just 0.5
seconds [500 ms] in early warning
would reduce rear-end collisions
by 60%." Two UMTRI studies
conclude that LED signals provide
a braking response time
advantage between 170 and 200
ms under favorable lighting
conditions and up to 300 ms
under adverse lighting conditions
(e.g., viewing at a distance with
high-intensity illumination on the
lamp surface). Note that a 200 ms
improvement in braking response
time is equivalent to a 19.1 feet
reduction in stopping distance at
a speed of 65 MPH."

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Apr 17, 2006 12:52:52 PM

fritz: Rennteam VIP; Loc: BaWü , Germany; Posts: 7675, Gallery; Registered on: Jul 23, 2003; Reply to: W8MM

Re: Forgot one other piece of information that I "learned"

Quote:
W8MM said:
Quote:
fritz said:Are we really talking about LEDs being a third of a second faster?

I would be impressed if that were the case.

Anybody have comparative figures?

Check this out from Hewlett-Packard (click me)

Excerpt: "Our research shows that
between 37% and 74% of rear-end
collisions are preventable by early
warning systems.... Just 0.5
seconds [500 ms] in early warning
would reduce rear-end collisions
by 60%." Two UMTRI studies
conclude that LED signals provide
a braking response time
advantage between 170 and 200
ms under favorable lighting
conditions and up to 300 ms
under adverse lighting conditions
(e.g., viewing at a distance with
high-intensity illumination on the
lamp surface). Note that a 200 ms
improvement in braking response
time is equivalent to a 19.1 feet
reduction in stopping distance at
a speed of 65 MPH."

Thanks.

I AM impressed.

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Apr 17, 2006 1:05:26 PM

BD 997: Veteran; Loc: Boston, MA USA; Posts: 833, Gallery; Registered on: Feb 16, 2005; Reply to: W8MM

Re: Forgot one other piece of information that I "learned"

Quote:
W8MM said:
Quote:
fritz said:Are we really talking about LEDs being a third of a second faster?

I would be impressed if that were the case.

Anybody have comparative figures?

Check this out from Hewlett-Packard (click me)

Excerpt: "Our research shows that
between 37% and 74% of rear-end
collisions are preventable by early
warning systems.... Just 0.5
seconds [500 ms] in early warning
would reduce rear-end collisions
by 60%." Two UMTRI studies
conclude that LED signals provide
a braking response time
advantage between 170 and 200
ms under favorable lighting
conditions and up to 300 ms
under adverse lighting conditions
(e.g., viewing at a distance with
high-intensity illumination on the
lamp surface). Note that a 200 ms
improvement in braking response
time is equivalent to a 19.1 feet
reduction in stopping distance at
a speed of 65 MPH."

Mr Valentine knows his stuff...

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Apr 17, 2006 1:20:27 PM

JakeGt2: Co-Pilot; Loc: NJ , United States; Posts: 238, Gallery; Registered on: Feb 24, 2005; Reply to: BD 997

Re: Forgot one other piece of information that I "learned"

i went as well, very impressive..... here are some pics i found on the "other" forum .... i hope it is ok to post it ?

http://www.6speedonline.com/forums/showthread.php?t=46763

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Apr 17, 2006 2:48:08 PM

AJVIP: Expert; Loc:; Posts: 1862, Gallery; Registered on: May 30, 2005; Reply to: JakeGt2

Re: Forgot one other piece of information that I "learned"

Alan,

Did you have a pass for the lounge? Porsche never returned my phone call (or my dealer's) for an invitation to the Turbo lounge. I was actually right down the block at my dealership on Saturday, checking out the Lamborghinis. I always prefer the dealership to the auto show, cause I can sit in the cars instead of looking at them from far away

Where are the pictures of these girls?

If anyone is heading to the auto show this week, let me know -- I have a girl working at the Dodge booth and I won't get a chance to say hello to her. Any volunteers?

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Apr 17, 2006 4:15:44 PM

Butzi: Co-Pilot; Loc: San Francsico, CA , United States; Posts: 194, Gallery; Registered on: Aug 23, 2005; Reply to: W8MM

Re: Forgot one other piece of information that I "learned"

Quote:
W8MM said:
Check this out from Hewlett-Packard (click me)

Excerpt: "Our research shows that
between 37% and 74% of rear-end
collisions are preventable by early
warning systems.... Just 0.5
seconds [500 ms] in early warning
would reduce rear-end collisions
by 60%." Two UMTRI studies
conclude that LED signals provide
a braking response time
advantage between 170 and 200
ms under favorable lighting
conditions and up to 300 ms
under adverse lighting conditions
(e.g., viewing at a distance with
high-intensity illumination on the
lamp surface). Note that a 200 ms
improvement in braking response
time is equivalent to a 19.1 feet
reduction in stopping distance at
a speed of 65 MPH."

These are very impressive numbers. Now I won't feel so bad following that new Honda Accord or Hyundai Azera ($25,000)with LED-equipped brake lights...

As long as they're not on the cell phone, that is

Come to think of it, I used LEDs for my Christmas tree lights this past season, inexpensive and amazing longevity! Come on Porsche!

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Apr 17, 2006 5:44:46 PM

WBH: Expert; Loc: CA; Posts: 1963, Gallery; Registered on: Jan 2, 2004; Reply to: Butzi

Re: Forgot one other piece of information that I "learned"

Per UK P site, 997TT has "fast-response" LED's for the high-level 3rd brake light.....

Not sure if addtl LED's in back are accretive/dilutive in terms of gaining attn of the guy behind you driving the typical 8yo car that's worth substantially less than the cost of your PCCBs....after all, they don't hand out those typical 8yo cars to just any kind of driver.....

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Apr 17, 2006 8:36:58 PM

Alan(NJ): Pilot; Loc: Paramus NJ USA; Posts: 403, Gallery; Registered on: Mar 29, 2002; Reply to: AJVIP

I had a invitation

But, when I asked the PCNA gal if they would not let a Porsche lover in without the invitation, she smiled sheepishly and said they'd let non-invitation holders in as well.

Good food, great cars and pretty ladies, what's not to like?

Actually went to the Javits Center on Sunday - what a zoo!
Couldn't get anywhere even close to the real hot cars.

Most interesting thing was the "actor" Ice-T was there checking out the Vantage V8. He got to go past the barriers and sit in the car. He was occupanied by a most extraordinary looking young blond girl clearly equipped with the latest in silicon bumpers!

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Apr 17, 2006 9:20:31 PM

AJVIP: Expert; Loc:; Posts: 1862, Gallery; Registered on: May 30, 2005; Reply to: Alan(NJ)

Re: I had a invitation

Quote:
Alan(NJ) said:
But, when I asked the PCNA gal if they would not let a Porsche lover in without the invitation, she smiled sheepishly and said they'd let non-invitation holders in as well.

Quote:
Alan(NJ) said:
Good food, great cars and pretty ladies, what's not to like?

Quote:
Alan(NJ) said:
Most interesting thing was the "actor" Ice-T was there checking out the Vantage V8. He got to go past the barriers and sit in the car. He was occupanied by a most extraordinary looking young blond girl clearly equipped with the latest in silicon bumpers!

Did she also have cash hanging out of her pants, along with a duffel bag reading "SCORES" ?

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Apr 17, 2006 10:15:10 PM

electrao: Junior; Loc: Lisbon , Portugal; Posts: 116, Gallery; Registered on: Aug 10, 2005; Reply to: AJVIP

Re: I had a invitation

I woud like to point out that besides being faster LEDs are also cheaper and longer lasting, so theres really no reason why not use leds for the back lights.

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Apr 18, 2006 12:29:23 AM

trip: Expert; Loc: Bay Area California , United States; Posts: 1563, Gallery; Registered on: Jan 11, 2006; Reply to: electrao

Re: I had a invitation

I agree, no excuse for all porsches not to feature them

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Apr 18, 2006 12:48:23 AM

FSU-997TT: Pilot; Loc: Florida , United States; Posts: 412, Gallery; Registered on: May 29, 2005; Reply to: electrao

Re: I had a invitation

Quote:
pedro_b said:
I woud like to point out that besides being faster LEDs are also cheaper and longer lasting, so theres really no reason why not use leds for the back lights.

LEDs do last up to 100,000 hours....which is forever in terms of the like of the car. But $345 in the service dept to change a $1.35 lamp is maybe what is hard to give up.....

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Apr 18, 2006 10:25:49 PM

Ferdie: Rennteam VIP; Loc: Europe , Germany; Posts: 6604, Gallery; Registered on: Jul 2, 2004; Reply to: Alan(NJ)

Re: I had a invitation

Quote:
Alan(NJ) said:
... young blond girl clearly equipped with the latest in silicon bumpers!

Considering the price of those babies, did they have... uhm... LEDs?

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