997 2005-2012 911 C2, C2S, C4, C4S, GTS, Targa and Cabriolet Model Discussion.
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Sport Chrono Debate

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Old 03-23-2005 | 09:22 PM
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Sport Chrono Debate

I'm thinking of ordering an S without the sport chrono because I figure I can change the ECU map on my own. TechArt has a 375hp package with a map and air filter. This way I could install proper lowering springs and avoid the mole on the dash.
Would anyone like to opine on this matter?
 
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Old 03-23-2005 | 09:46 PM
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You might want to remember that Sport Chrono also loosens the PSM settings (more tail slide), stiffens the suspension settings in PASM, and changes the throttle sensitivity. Notice: Sport Chrono produces no more power.

On top of that there are a number of small convenience items Sport Chrono controls like lights (how long they stay on when the car is switched off, etc)

I dislike the Wart, but on balance can live with it when I look at the + side of what Sport Chrono can do.
 
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Old 03-23-2005 | 09:51 PM
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You might want to remember that Sport Chrono also loosens the PSM settings (more tail slide), stiffens the suspension settings in PASM, and changes the throttle sensitivity.

You might want to remember though that it's extremely difficult to fit lowered springs to a 997S as the ECU controls PASM. Take away PASM and you would need to instruct the ECU to ignore phantom PASM messages from any remaining sensors. If you can reprogram that lot, good luck to you!

On top of that there are a number of small convenience items Sport Chrono controls like lights (how long they stay on when the car is switched off, etc)

Notice by the way that Sport Chrono produces no more power.

I dislike the Wart, but on balance can live with it when I look at the + side of what Sport Chrono can do.
 
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Old 03-23-2005 | 10:46 PM
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Not sure is worth it to void warranty for 20HP (5.5% Gain if that), not sure you can feel it. Mod my BMW 330 (CAI, Software and Throttle Body. About 22hp 10% gain) and the difference in feel is very minimal.
 
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Old 03-23-2005 | 11:57 PM
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You'll get used to the way it looks, on the dash, so much that you will see other 997's, that don't have it, as missing something. It has other functions, like Le Chef said, as well. On resale, you might loose some money, no idea how much though, if your 997S is missing it.
If you feel that strongly against it, don't order it. But I think it's an option that you might not regret going for.
 
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Old 03-24-2005 | 02:16 AM
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will tell you that I LOVE the clock on the dash + the feeling of the throttle sensitivity in SPORT. Wouldnt have taken a car without it. my.02
 
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Old 03-24-2005 | 02:19 AM
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On that note, can one increase the throttle sensitivity even further than that of the sport chrono? It seems as if it is a fairly simple software tweak that any Porsche mechanic can perform. Chef, it would be easy for a layman to confuse throttle sensitivity with downright speed or quickness. Can you delve into the nuances involved between the two?
 
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Old 03-24-2005 | 02:40 AM
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Can you clock your 0-60 automatically?
 
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Old 03-24-2005 | 06:27 AM
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I say get it!!
 
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Old 03-24-2005 | 07:32 AM
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I'd get it also.
 
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Old 03-24-2005 | 10:05 AM
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Originally posted by TheJudge
On that note, can one increase the throttle sensitivity even further than that of the sport chrono?

Possibly> I'm sure Porsche could do that by putting more data points in the map. But how miuch time and effort that would take I'm not sure.


It seems as if it is a fairly simple software tweak that any Porsche mechanic can perform.

I wouldn't think it was that easy, since the mapping is likely linked to a whole bunch of other parameters that are part of the engine management/braking and suspension systems.

On top of that I can't imagine any Porsche mechanic being prepared to do that is it would affect warranty and who knows if there might be safety related issues also.

Chef, it would be easy for a layman to confuse throttle sensitivity with downright speed or quickness. Can you delve into the nuances involved between the two?
The car is not faster: it just feels that way because the amount of travel on the gas pedal is less. The car feels like it's straining at the leash.

Take a look at the 997 brochure or go online to the website and look up Sport Chrono.
 
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Old 03-24-2005 | 04:21 PM
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Le Chef with another amazing breakdown!
 
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Old 03-24-2005 | 06:07 PM
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you can record lap times too!
 
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Old 03-24-2005 | 09:27 PM
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Originally posted by Le Chef
The car is not faster: it just feels that way because the amount of travel on the gas pedal is less. The car feels like it's straining at the leash.

Take a look at the 997 brochure or go online to the website and look up Sport Chrono.
Sounds right to me.

Same thing when you drive an M3 in sport mode. The gas pedal is just more "sensitive" (quicker throttle response) so you feel like the car revs higher and goes faster.

This happened to me the first time I drove my friend's M.
 
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Old 03-25-2005 | 12:28 AM
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I love mine, you must get it or you will be sorry!
 


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