Rennteam 2.0 - FR - Forum - Re: Relative performance of Carrera GT and 997TT at high spe - Page1

11 août 2006 08:13:56

CarreraGtRacer: Veteran; Lieu: Houston, TX; Messages: 1181, Gallery; Inscrit depuis le: 1 janv. 2004

200mph on the streets in the Carrera GT

This takes some serious balls

http://videos.streetfire.net/video/6df90e9a-fe92-44b1-9b3e-981800db5840.htm

I love it

The tach lit up like that man oh man

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11 août 2006 09:48:35

MKSGR: Rennteam Moderator; Lieu: Germany , Allemagne; Messages: 8098, Gallery; Inscrit depuis le: 17 juin 2002; En réponse de: CarreraGtRacer

Relative performance of Carrera GT and 997TT at high speeds

Quote:
CarreraGtRacer said:
This takes some serious balls

http://videos.streetfire.net/video/6df90e9a-fe92-44b1-9b3e-981800db5840.htm

I love it The tach lit up like that man oh man

What is really interesting is that (based on speedo) this Carrera GT does 200-305kph in around 25 seconds.

Now guess which time RC's 997TT Tip and my test 997TT Manual did? Between 22-23 seconds...

P.S.: Obviously, the speedometer of the Carrera GT might be much more precise than in the 997TT. However, this result underpins that the 997TT (in its standard version without Powerkit) is not much slower (if at all

) at speeds above 125mph.

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11 août 2006 10:01:59

ha: Expert; Lieu: Riyadh , Arabie Saoudite; Messages: 1695, Gallery; Inscrit depuis le: 20 nov. 2003; En réponse de: MKSGR

Re: Relative performance of Carrera GT and 997TT at high speeds

You are right MKSGR, however, the driver was on sixth gear the whole time.

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11 août 2006 10:46:07

Crash: Rennteam VIP; Lieu: Never been to , Antarctique; Messages: 8287, Gallery; Inscrit depuis le: 17 oct. 2002; En réponse de: ha

Re: Relative performance of Carrera GT and 997TT at high speeds

Quote:
ha said:
You are right MKSGR, however, the driver was on sixth gear the whole time.

And seeing how the CGT is no torque monster, this is probably the cause of such a slow time.

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11 août 2006 12:29:09

MKSGR: Rennteam Moderator; Lieu: Germany , Allemagne; Messages: 8098, Gallery; Inscrit depuis le: 17 juin 2002; En réponse de: ha

Re: Relative performance of Carrera GT and 997TT at high speeds

Quote:
ha said:
You are right MKSGR, however, the driver was on sixth gear the whole time.

Good point...

In the 997TT 200-305kph acceleration times are identical in 6th gear and in 5th/6th gear. However, in a non-supercharged car this should be different.

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11 août 2006 12:38:22

MKSGR: Rennteam Moderator; Lieu: Germany , Allemagne; Messages: 8098, Gallery; Inscrit depuis le: 17 juin 2002; En réponse de: ha

Re: Relative performance of Carrera GT and 997TT at high speeds

Quote:
ha said:
You are right MKSGR, however, the driver was on sixth gear the whole time.

Taking this into account, I have some different figures:

Tested on 997TT Manual (all values based on speedo):

200-305kph: 22.5s
200-275kph: 13.5s
275-305kph: 9s

Based on the video:

275-305kph: 10s to 11s

Thus, in the highest speed range (where there is no need to shift from 5th to 6th) the GT is not faster (maybe slower?) than the standard 997TT

P.S.: Maybe it is just that the accuracy of the speedo differs substantially between Carrera GT and 997TT. However, the numbers show, how close these two cars are in terms of high-speed performance.

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11 août 2006 13:56:06

Crash: Rennteam VIP; Lieu: Never been to , Antarctique; Messages: 8287, Gallery; Inscrit depuis le: 17 oct. 2002; En réponse de: MKSGR

Re: Relative performance of Carrera GT and 997TT at high speeds

Quote:
MKSGR said:
Quote:
ha said:
You are right MKSGR, however, the driver was on sixth gear the whole time.

Taking this into account, I have some different figures:

Tested on 997TT Manual (all values based on speedo):

200-305kph: 22.5s
200-275kph: 13.5s
275-305kph: 9s

Based on the video:

275-305kph: 10s to 11s

Thus, in the highest speed range (where there is no need to shift from 5th to 6th) the GT is not faster (maybe slower?) than the standard 997TT

P.S.: Maybe it is just that the accuracy of the speedo differs substantially between Carrera GT and 997TT. However, the numbers show, how close these two cars are in terms of high-speed performance.

The GT2 is going to cause a lot of problems for it in the straight line.

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11 août 2006 15:17:46

nberry: Rennteam VIP; Lieu: La Jolla, USA , Etats-Unis; Messages: 13737, Gallery; Inscrit depuis le: 11 avr. 2002; En réponse de: ha

Re: Relative performance of Carrera GT and 997TT at high speeds

Quote:
ha said:
You are right MKSGR, however, the driver was on sixth gear the whole time.

Exactly. I have been in the CGT and driven it when applying gearing to get up to very high speeds

and I will tell you to my knowledge there isn't anything out there that will beat at those speeds except possible the Enzo. The SLR would require a greater distance to over take the CGT if at all.

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11 août 2006 15:28:24

MKSGR: Rennteam Moderator; Lieu: Germany , Allemagne; Messages: 8098, Gallery; Inscrit depuis le: 17 juin 2002; En réponse de: nberry

Re: Relative performance of Carrera GT and 997TT at high speeds

Quote:
nberry said:
Quote:
ha said:
You are right MKSGR, however, the driver was on sixth gear the whole time.

Exactly. I have been in the CGT and driven it when applying gearing to get up to very high speeds and I will tell you to my knowledge there isn't anything out there that will beat at those speeds except possible the Enzo. The SLR would require a greater distance to over take the CGT if at all.

Impressions and numbers don't always tell the same story

. The 997TT does not feel fast at high speeds. However, it is very fast as the numbers on my stop watch told me.

The above numbers indicate that even the standard 997TT is very, very close to Carrera GT performance at speeds above 250kph (and maybe even at above 200kph)... I do not believe that the 997TT is faster - although the above numbers suggest that

BTW: the SLR is (from the top of my head) around 2 seconds faster 0-300 than the Carrera GT. The Enzo was around 6 or 8 seconds quicker. I was also very disappointed when I read this high-speed test of AMS

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11 août 2006 17:47:29

nberry: Rennteam VIP; Lieu: La Jolla, USA , Etats-Unis; Messages: 13737, Gallery; Inscrit depuis le: 11 avr. 2002; En réponse de: MKSGR

Re: Relative performance of Carrera GT and 997TT at high speeds

Here are some numbers to ponder.

997TT 480hp weight 3500pds

CGT 610hp weight 3200pds

I know gearing, suspension and tires plays a role in some of these races but at the end of the day hp and weight rules.

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11 août 2006 17:58:10

ha: Expert; Lieu: Riyadh , Arabie Saoudite; Messages: 1695, Gallery; Inscrit depuis le: 20 nov. 2003; En réponse de: nberry

Re: Relative performance of Carrera GT and 997TT at high speeds

Quote:
nberry said:
Exactly. I have been in the CGT and driven it when applying gearing to get up to very high speeds and I will tell you to my knowledge there isn't anything out there that will beat at those speeds except possible the Enzo. The SLR would require a greater distance to over take the CGT if at all.

I haven't tried it but I think both the Enzo & SLR will be faster from 250-300km than the CGT. I have a friend who has an Enzo but he refuses to race me on the track or straight line. He has taken on cars ranging from E55s to Zondas and beat them senselessly. Every time I ask him for a chance to race its either too hot, too dusty or what have you. For some weird reason he thinks that the CGT will trash him! Maybe on the track but definitely not on a straight line.

I guess the only way to find out for sure is to buy myself an Enzo.

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11 août 2006 20:24:39

connoisseur: Senior; Lieu: Nebraska; Messages: 752, Gallery; Inscrit depuis le: 30 janv. 2005; En réponse de: nberry

Re: Relative performance of Carrera GT and 997TT at high speeds

Based on the video you have good headlights, but they are not 200mph headlights.

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11 août 2006 20:26:36

Hurst: Veteran; Lieu: Potomac, MD; Messages: 1255, Gallery; Inscrit depuis le: 15 avr. 2005; En réponse de: nberry

Re: Relative performance of Carrera GT and 997TT at high spe

Quote:
nberry said:
Here are some numbers to ponder.

997TT 480hp weight 3500pds

CGT 610hp weight 3200pds

I know gearing, suspension and tires plays a role in some of these races but at the end of the day hp and weight rules.

I think we are neglecting the Coeffecient of Drag. Rumor has it that the CGT has a poor Cd, because it was more downforce/design oriented. I'd love to see the technical specifications of each cars in terms of their Cd.

I believe the scientific explanation says that for each .1 more Cd, it takes 50hp more (same weight and tyres provided) to yeild 200mph? Plus, the size of the massive rubber on the CGT as well as the unsprung weight has to be taken into account.... The CGT is a Roadster/T-Top (what have you).

There are a lot of variables here, besides weight and hp.

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11 août 2006 21:09:45

nberry: Rennteam VIP; Lieu: La Jolla, USA , Etats-Unis; Messages: 13737, Gallery; Inscrit depuis le: 11 avr. 2002; En réponse de: Hurst

Re: Relative performance of Carrera GT and 997TT at high spe

You may have a point about downforce but I doubt it applies to the CGT. I have seen this car torn apart by experts and I can tell you never have I seen a car designed better for racing. Every part, design and structure is made for speed. It is an incredible racing machine. Therefore I am confident they did not handicap the car for high speed acceleration.

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11 août 2006 21:28:41

MKSGR: Rennteam Moderator; Lieu: Germany , Allemagne; Messages: 8098, Gallery; Inscrit depuis le: 17 juin 2002; En réponse de: nberry

Re: Relative performance of Carrera GT and 997TT at high speeds

Quote:
nberry said:
Here are some numbers to ponder.

997TT 480hp weight 3500pds

CGT 610hp weight 3200pds

I know gearing, suspension and tires plays a role in some of these races but at the end of the day hp and weight rules.

Gearing is one important factor. The other is aerodynamics. In particular at high speeds...

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11 août 2006 22:51:02

Crash: Rennteam VIP; Lieu: Never been to , Antarctique; Messages: 8287, Gallery; Inscrit depuis le: 17 oct. 2002; En réponse de: Hurst

Re: Relative performance of Carrera GT and 997TT at high spe

Quote:
Hurst said:
Quote:
nberry said:
Here are some numbers to ponder.

997TT 480hp weight 3500pds

CGT 610hp weight 3200pds

I know gearing, suspension and tires plays a role in some of these races but at the end of the day hp and weight rules.

I think we are neglecting the Coeffecient of Drag. Rumor has it that the CGT has a poor Cd, because it was more downforce/design oriented. I'd love to see the technical specifications of each cars in terms of their Cd.

I believe the scientific explanation says that for each .1 more Cd, it takes 50hp more (same weight and tyres provided) to yeild 200mph? Plus, the size of the massive rubber on the CGT as well as the unsprung weight has to be taken into account.... The CGT is a Roadster/T-Top (what have you).

There are a lot of variables here, besides weight and hp.

True. However, the Enzo doesn't have much less downforce (only several pounds or so) than the CGT, has the same beefy tires and accelerates neck-and-neck with the CGT up to 270 km/h. And then, out of nowhere, it gains around 7 seconds to 300 km/h? It makes no sense! It's like it hits a wall at 270 km/h and acceleration slows to a halt. I doubt that aerodynamics would have anything to do with such an abrupt slowdown

.

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12 août 2006 02:35:47

Hurst: Veteran; Lieu: Potomac, MD; Messages: 1255, Gallery; Inscrit depuis le: 15 avr. 2005; En réponse de: Crash

Re: Relative performance of Carrera GT and 997TT at high spe

Quote:
Crash said:
Quote:
Hurst said:
Quote:
nberry said:
Here are some numbers to ponder.

997TT 480hp weight 3500pds

CGT 610hp weight 3200pds

I know gearing, suspension and tires plays a role in some of these races but at the end of the day hp and weight rules.

I think we are neglecting the Coeffecient of Drag. Rumor has it that the CGT has a poor Cd, because it was more downforce/design oriented. I'd love to see the technical specifications of each cars in terms of their Cd.

I believe the scientific explanation says that for each .1 more Cd, it takes 50hp more (same weight and tyres provided) to yeild 200mph? Plus, the size of the massive rubber on the CGT as well as the unsprung weight has to be taken into account.... The CGT is a Roadster/T-Top (what have you).

There are a lot of variables here, besides weight and hp.

True. However, the Enzo doesn't have much less downforce (only several pounds or so) than the CGT, has the same beefy tires and accelerates neck-and-neck with the CGT up to 270 km/h. And then, out of nowhere, it gains around 7 seconds to 300 km/h? It makes no sense! It's like it hits a wall at 270 km/h and acceleration slows to a halt. I doubt that aerodynamics would have anything to do with such an abrupt slowdown .

Cd is my inclination.

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12 août 2006 03:59:14

Hurst: Veteran; Lieu: Potomac, MD; Messages: 1255, Gallery; Inscrit depuis le: 15 avr. 2005; En réponse de: Hurst

Re: Relative performance of Carrera GT and 997TT at high spe

I started an inquiry into this on this thread. Enjoy!

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200mph on the streets in the Carrera GT

Relative performance of Carrera GT and 997TT at high speeds

Re: Relative performance of Carrera GT and 997TT at high speeds

Re: Relative performance of Carrera GT and 997TT at high speeds

Re: Relative performance of Carrera GT and 997TT at high speeds

Re: Relative performance of Carrera GT and 997TT at high speeds

Re: Relative performance of Carrera GT and 997TT at high speeds

Re: Relative performance of Carrera GT and 997TT at high speeds

Re: Relative performance of Carrera GT and 997TT at high speeds

Re: Relative performance of Carrera GT and 997TT at high speeds

Re: Relative performance of Carrera GT and 997TT at high speeds

Re: Relative performance of Carrera GT and 997TT at high speeds

Re: Relative performance of Carrera GT and 997TT at high spe

Re: Relative performance of Carrera GT and 997TT at high spe

Re: Relative performance of Carrera GT and 997TT at high speeds

Re: Relative performance of Carrera GT and 997TT at high spe

Re: Relative performance of Carrera GT and 997TT at high spe

Re: Relative performance of Carrera GT and 997TT at high spe

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