Watching the RCF video, it is clear most of the time tail is sliding out with lots of oversteer (due to TVD most likely as I have experienced it in 'Track' mode), but a very good lap time nonetheless and then there is the noise

http://www.autobild.de/artikel/bmw-m...h-5740713.html

http://www.autobild.de/artikel/ford-...t-5706398.html

Lap times:

BMW M4: 1:37.8
Lexus RCF (TVD, no carbon package): 1:39.5
Mustang GT: 1:40.6

BMW M4:


Lexus RCF:


BONUS: Lexus LC500

You Tube

 

i expected better from the faster M4 with the ceramic brakes

 

RCF could have also done better, if had been with the carbon fiber intended to offset the additional weight of the TVD (and lower CoG). Sachsenring is a technical high speed momentum/flow track with elevation and camber changes where 450+ HP cars reach around 120+ mph.

I dug up some other interesting laps from the Auto Bild super test archives:

GT350: 1:37.1
C63 S AMG (510 HP): 1:37.3
ATS-V: 1:38.6
Boss 302 Laguna Seca: 1:39.9
C63 AMG PP (487 HP): 1:40.7
BMW 1M Coupe: 1:40.2
E92 M3 Competition: 1:40.5
Lexus ISF (2012): 1:40.8
Audi RS5: 1:40.8
BMW M3 E92: 1:40.9
Lexus LC500: 1:41
Civic Type R: 1:41.1
C43 AMG: 1:41.7
Lexus ISF (2010): 1:42.1
Focus RS: 1:43.3
C63 AMG (457 HP): 1:44.1

 

Tvd without carbon?! Didnt think that was possible

 

Lexus earlier had issues with carbon fiber manufacturing process so Lexus decided to offer TVD as a standalone option for a while till Lexus addressed the carbon fiber issue. So, many of the press cars were non-carbon fiber (even sometimes with moonroof) and had TVD.

 

The roof isn't that heavy also that car had no sunroof that's a decent amount of weight. I am just not a fan of the TVD. I feel like the TVD was a bandaid for the weight of the vehicle. Why not just nake the car lighter . Plenty of results out there to show the TVD cars put down less power and slower in a straight line.

 

C&D did a head-to-head comparison of the TVD vs LSD and the TVD was 0.5 seconds quicker so it definitely serves its purpose on the track. C&D said, TVD minimizes understeer. It was also equipped with the moonroof. Not even with the lighter carbon fiber roof. Dyno numbers vary from dyno to dyno. Dynos should only be used for before and after. There is a member here who made 400 whp bone stock with carbon/TVD.

Though, most drivers will not drive it hard to enough to properly use it, but the car has to be pushed to truly appreciate the TVD. It makes the car very neutral under heavy throttle as the nose turns in tighter and tighter as you apply more throttle (it is evident in the video above).

 

I'm just having convo no hard feelings this is my opinion!

I definitely won't dispute a TVD is better around a track but from what I have seen on tbe internet is that the tvds are noticeably slower on straight line acceleration. The TVD has way more moving parts in its assembly. The more power has to transfer through more moving parts inertia is going to be hindered . That's just fact. And to your dyno point, one car on one specific dyno can have varying results. For instance my car full bolt ins put down 460 whp. Seeemingly the highest recorded for NA as well as my car put down the same who my friends were getting with a larger NOS shot than me . To back up his 400whp stock and my 460 bolt on power you would need several different RCFs on the same dyno on the same day back to back to prove that this car should do this and this one should do that.


You and I have had this convo before in another thread lol.

 

There was only one video (you posted it in that thread) and I saw it well before I purchased my RCF. I was surprised until I read the comments of the poster of the video and I did not have any concerns anymore. If you read the original poster's comments, he said the cars were not equally modded and the TVD RCF had a 250 lbs extra passenger. The driver also weighed 30 lbs more in the TVD. No wonder it would lose. It was not even an apples to apples comparison. I no longer was concerned about spending the extra few grand on a carbon/TVD.

I don't see 1/4 mile magazine test numbers supporting that either. R&T ran 12.7 seconds with carbon/TVD and I don't see a quicker time with the LSD in any of the magazine tests.

p.s. This thread is about track laps anyway, which is what TVD was built to do.

 

Gotcha sorry to thread jack .But the TVD s aren't any faster or put more power down at the end of the day

 

Drama !!!!!

 

I never said TVD is quicker than LSD in a straight line as I wrote above. I have no clue. Nothing conclusive other than similar magazine times. TVD only helps in rotating the car by vectoring additional torque, but acts like an LSD in straight line. It was only proven quicker around the track by 0.5 seconds by C&D comparison (which you also agree with)

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