Wow!!! 4.3 0-60
09-21-14, 10:50 AM
#2
09-21-14, 03:45 PM
#4
Lexus Test Driver
Anyone knows what the stall limit is for the torque converter on the IS-F?
I remember Lexus promoted in the official press conference that the IS-F having the ability to do hard launches due to a rather high stall limit for the torque converter. I believe it was around 4000 rpm.
Looks to me like Lexus (at least with prototypes) has been discouraging hard launches on the RC-F. I wonder if Lexus has made a high limit available on the RC-F?
I remember Lexus promoted in the official press conference that the IS-F having the ability to do hard launches due to a rather high stall limit for the torque converter. I believe it was around 4000 rpm.
Looks to me like Lexus (at least with prototypes) has been discouraging hard launches on the RC-F. I wonder if Lexus has made a high limit available on the RC-F?
09-21-14, 06:02 PM
#5
Tech Info Resource
iTrader: (2)
Anyone knows what the stall limit is for the torque converter on the IS-F?
I remember Lexus promoted in the official press conference that the IS-F having the ability to do hard launches due to a rather high stall limit for the torque converter. I believe it was around 4000 rpm.
Looks to me like Lexus (at least with prototypes) has been discouraging hard launches on the RC-F. I wonder if Lexus has made a high limit available on the RC-F?
I remember Lexus promoted in the official press conference that the IS-F having the ability to do hard launches due to a rather high stall limit for the torque converter. I believe it was around 4000 rpm.
Looks to me like Lexus (at least with prototypes) has been discouraging hard launches on the RC-F. I wonder if Lexus has made a high limit available on the RC-F?
NOTICE:
Do not perform the stall speed test for longer than 5 seconds.
(a) Connect the Techstream to the DLC3.
(b) Run the vehicle until the transmission fluid temperature has reached 60 to 110°C (140 to 230°F).
(c) Allow the engine to idle with the air conditioning and headlights OFF.
(d) Chock all 4 wheels.
(e) Set the parking brake and keep the brake pedal depressed firmly with your left foot.
(f) Move the shift lever to D.
(g) Depress the accelerator pedal as much as possible with your right foot.
(h) Read the engine rpm (stall speed) and release the accelerator pedal immediately.
Standard value:
2225 +/- 150 rpm
Do not perform the stall speed test for longer than 5 seconds.
(a) Connect the Techstream to the DLC3.
(b) Run the vehicle until the transmission fluid temperature has reached 60 to 110°C (140 to 230°F).
(c) Allow the engine to idle with the air conditioning and headlights OFF.
(d) Chock all 4 wheels.
(e) Set the parking brake and keep the brake pedal depressed firmly with your left foot.
(f) Move the shift lever to D.
(g) Depress the accelerator pedal as much as possible with your right foot.
(h) Read the engine rpm (stall speed) and release the accelerator pedal immediately.
Standard value:
2225 +/- 150 rpm
09-21-14, 06:49 PM
#6
Lexus Test Driver
09-23-14, 10:03 AM
#8
The car will achieve and probably exceed the stated Lexus spec of at least a 12.5 quarter mile. Even MotorTrend's desert run produced a 4.3 versus 4.5 0-60--the car spec'd at 4.4.
Way too soon for anyone to view this stuff as definitive results.
And what is it about MotorTrend and their consistently inconsistent numbers for the same car being reviewed? It seems to happen a lot with their coverage.
09-23-14, 10:45 AM
#10
Lexus Test Driver
The RC-F should be quicker than the IS-F by a substantial margin. It has all the advantages in the world (PWR, gearing, torque band etc.) so it is impossible for it to be slower or merely as quick.
09-23-14, 02:40 PM
#11
Tech Info Resource
iTrader: (2)
You've seen the official gearing specs for the RCF?
09-23-14, 04:05 PM
#12
I hear you. What we have seen is the conservative spec: 4.4 and 12.5. Even MT ran a 4.3 in the desert. The F drivers know this car is quite capable.
What we also know is that this is a bigger, next-class car with different handling mechanics, improved tranny, TVD, and an incredible next-generation engine.
We all need to give the final production car, yet to appear, the opportunity to perform in consistent testing.
I will be amazed if a great driver cannot drop the 0-60 to 4.1-4.2 and the quarter mile to 12.3. Time can only tell. Again, really, a desert?
Personally, it's got plenty of the right stuff to keep me occupied and engaged, road and track, as a serious driver.
I also doubt that Yaguchi would miss his target.
What we also know is that this is a bigger, next-class car with different handling mechanics, improved tranny, TVD, and an incredible next-generation engine.
We all need to give the final production car, yet to appear, the opportunity to perform in consistent testing.
I will be amazed if a great driver cannot drop the 0-60 to 4.1-4.2 and the quarter mile to 12.3. Time can only tell. Again, really, a desert?
Personally, it's got plenty of the right stuff to keep me occupied and engaged, road and track, as a serious driver.
I also doubt that Yaguchi would miss his target.
09-23-14, 04:23 PM
#13
Tech Info Resource
iTrader: (2)
The F drivers who have been to the track know the F is good for a heavy sedan. It's not great by any stretch of the imagination, and at any track weekend, I am pointing Corvettes (even base models) by with equal drivers. This is where I disagree with the philosophy I see Lexus choosing. If they want the brand known for performance, they need to bring real performance. The idea of "accessible" performance and "too much acceleration scares the novice" are all fine and good if your goal is to appeal to people who don't actually push their cars.
If you do push your car (and I have pushed my F pretty hard) I know in 15 minutes the tires are going to get greasy. I know I have to back off a notch if I want to finish my session without risking an incident.
Why should I have to expect the same from the RCF? I really do expect it to be exactly the same - not capable of full performance for even a 20 minute session in the stock configuration with track oriented brake pads. Just like the IS-F.
And that's where I am disappointed.
If you do push your car (and I have pushed my F pretty hard) I know in 15 minutes the tires are going to get greasy. I know I have to back off a notch if I want to finish my session without risking an incident.
Why should I have to expect the same from the RCF? I really do expect it to be exactly the same - not capable of full performance for even a 20 minute session in the stock configuration with track oriented brake pads. Just like the IS-F.
And that's where I am disappointed.
09-23-14, 04:44 PM
#14
The F drivers who have been to the track know the F is good for a heavy sedan. It's not great by any stretch of the imagination, and at any track weekend, I am pointing Corvettes (even base models) by with equal drivers. This is where I disagree with the philosophy I see Lexus choosing. If they want the brand known for performance, they need to bring real performance. The idea of "accessible" performance and "too much acceleration scares the novice" are all fine and good if your goal is to appeal to people who don't actually push their cars.
If you do push your car (and I have pushed my F pretty hard) I know in 15 minutes the tires are going to get greasy. I know I have to back off a notch if I want to finish my session without risking an incident.
Why should I have to expect the same from the RCF? I really do expect it to be exactly the same - not capable of full performance for even a 20 minute session in the stock configuration with track oriented brake pads. Just like the IS-F.
And that's where I am disappointed.
If you do push your car (and I have pushed my F pretty hard) I know in 15 minutes the tires are going to get greasy. I know I have to back off a notch if I want to finish my session without risking an incident.
Why should I have to expect the same from the RCF? I really do expect it to be exactly the same - not capable of full performance for even a 20 minute session in the stock configuration with track oriented brake pads. Just like the IS-F.
And that's where I am disappointed.
The prototypes were driven all day. Sure, buy day end, the cars were smoking hot. I am not sure it is fair to expect any of the cars in the class to perform for that duration of time, IMO. Even an over driven M4 on the track is going to exhibit undesirable characteristics.
We are leaping into a set of perameters for a race car. Either by design or reliability, none of the cars in the RCF class has everything that it takes to run the perfect race.
09-23-14, 04:52 PM
#15
Tech Info Resource
iTrader: (2)
I don't want to run a race. I'd buy a real race car if I wanted that. I want a 20 minute session without having to back off. That's all. It's the whole reason I put 245/275 tires on my F. Longer into the session before I have the car say uncle.