Yaguchi Hints at "Continual Evolution" for RC F
09-01-14, 04:58 PM
#1
Pit Crew
Thread Starter
Yaguchi Hints at "Continual Evolution" for RC F
Intriguingly, he did concede there was more power to be eked from the engine, without resorting to forced induction.
“We think we can get a little more out of it,” he said.
“It’s really about increasing the rpm to be able to gain more horsepower, so if we were to increase the rpm then we would have to look at using what components to be able to meet the rpm increase… so at that time we would also have to review the cost etcetera. So right now it is set.”
Yaguchi made the point that continual evolution of the RC F follows the path of its IS F sedan predecessor, which he also chief engineered.
“That car actually had some model changes each year and that would most likely happen with the RC F,” he confirmed.
“We think we can get a little more out of it,” he said.
“It’s really about increasing the rpm to be able to gain more horsepower, so if we were to increase the rpm then we would have to look at using what components to be able to meet the rpm increase… so at that time we would also have to review the cost etcetera. So right now it is set.”
Yaguchi made the point that continual evolution of the RC F follows the path of its IS F sedan predecessor, which he also chief engineered.
“That car actually had some model changes each year and that would most likely happen with the RC F,” he confirmed.
http://www.motoring.com.au/news/spor...ter-rc-f-45711
Also, 2 other good reads from the same website concerning future F models and why hybrid F model may not come for a while
Lexus Rules Out CT F and NX F
Lexus F Studies Hybrid
Last edited by iggyhop9; 09-01-14 at 05:04 PM.
09-01-14, 05:13 PM
#3
Seems like the RC F will receive the same annual treatment the IS F got during its model run. Does that discourage anyone(not me), knowing the 16' or 17' may come with noticeable improvements over the 15'? Just seeing what you guys think.
http://www.motoring.com.au/news/spor...ter-rc-f-45711
Also, 2 other good reads from the same website concerning future F models and why hybrid F model may not come for a while
Lexus Rules Out CT F and NX F
Lexus F Studies Hybrid
http://www.motoring.com.au/news/spor...ter-rc-f-45711
Also, 2 other good reads from the same website concerning future F models and why hybrid F model may not come for a while
Lexus Rules Out CT F and NX F
Lexus F Studies Hybrid
09-01-14, 05:15 PM
#4
Pit Crew
Thread Starter
Hell, might as well throw this tidbit in there too:
From the hybrid related article.
Most significantly, Leupen said development of what he called a manual-shift gearbox for the new generation RC F/IS F drivetrain was underway. He also mentioned development of hybrid technology for the next generation IS F using a manual-shift gearbox.
"That car might be two or three years away but when it does come you will find it has been developed by TMG," he said.
"That car might be two or three years away but when it does come you will find it has been developed by TMG," he said.
09-01-14, 05:20 PM
#5
I am not surprised by this at all. However, there is a limited market for true manual trannies--people talk about it but when it comes to forking out the cash to buy the manual, they walk on by.
09-01-14, 05:33 PM
#6
Lexus Test Driver
OMG! He hinted at a higher revving RC-F (possibly 8000 rpm from a 5.0 Liter V8?). That would be so cool!
09-01-14, 05:48 PM
#7
I don't know how to calculate piston speed but I think 8000 rpm from the RC-F motor is probably not ideal. If it indeed has the same bore and stroke as the ISF, since they use the same engine code and all; that would make actual piston speed way too fast. That will greatly decreases the reliability for a street car. I think Lobuxracer talked about this on the ISF forums.
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09-01-14, 05:50 PM
#8
Pit Crew
Thread Starter
I was raised on an automatic(04 Matrix) and don't even know how to expertly drive a manual, so you'll never see me clamoring for it. The younger generation is more likely to learn on autos. That percentage will only get bigger
09-01-14, 05:53 PM
#9
only major changes I can see are engine power, maybe a DCT, suspension revision, or ECU tune. RCF is starting out way ahead of what the ISF had when it was released. I dont really see as drastic changes as the ISF got during its lifetime. We know theres a lot more hidden potential in the engine because SARD was able to do a 30-40 hp upgrade just from an ECY tune and it isnt even that aggressive of a tune.
Last edited by 4TehNguyen; 09-01-14 at 05:58 PM.
09-01-14, 06:07 PM
#10
Liquid Bra Champion
I don't know how to calculate piston speed but I think 8000 rpm from the RC-F motor is probably not ideal. If it indeed has the same bore and stroke as the ISF, since they use the same engine code and all; that would make actual piston speed way too fast. That will greatly decreases the reliability for a street car. I think Lobuxracer talked about this on the ISF forums.
09-01-14, 06:19 PM
#11
Lexus Test Driver
I don't know how to calculate piston speed but I think 8000 rpm from the RC-F motor is probably not ideal. If it indeed has the same bore and stroke as the ISF, since they use the same engine code and all; that would make actual piston speed way too fast. That will greatly decreases the reliability for a street car. I think Lobuxracer talked about this on the ISF forums.
The RC-F GT3 revs over 8000+ rpm already with the same engine. Makes 100+ HP/Liter N/A. 540 PS from the same 5.0 Liter V8. The engine is capable of revving much higher. The only question is, whether the auto transmission is capable of handling revs that high or an automated transmission is required.
09-01-14, 06:34 PM
#12
Liquid Bra Champion
Yaguchi san said increasing rpm to get more hp is the route he would go for.
The RC-F GT3 revs over 8000+ rpm already with the same engine. Makes 100+ HP/Liter N/A. 540 PS from the same 5.0 Liter V8. The engine is capable of revving much higher. The only question is, whether the auto transmission is capable of handling revs that high or an automated transmission is required.
The RC-F GT3 revs over 8000+ rpm already with the same engine. Makes 100+ HP/Liter N/A. 540 PS from the same 5.0 Liter V8. The engine is capable of revving much higher. The only question is, whether the auto transmission is capable of handling revs that high or an automated transmission is required.
09-01-14, 09:50 PM
#13
Yaguchi san said increasing rpm to get more hp is the route he would go for.
The RC-F GT3 revs over 8000+ rpm already with the same engine. Makes 100+ HP/Liter N/A. 540 PS from the same 5.0 Liter V8. The engine is capable of revving much higher. The only question is, whether the auto transmission is capable of handling revs that high or an automated transmission is required.
The RC-F GT3 revs over 8000+ rpm already with the same engine. Makes 100+ HP/Liter N/A. 540 PS from the same 5.0 Liter V8. The engine is capable of revving much higher. The only question is, whether the auto transmission is capable of handling revs that high or an automated transmission is required.
Here is what Lobuxracer said, I tend to trust his automotive knowledge more than almost anyone on tthis board.
Originally Posted by lobuxracer
Very unlikely to be a problem unless the valve springs are some of the defective ones. It's pretty hard to float 4 valve per cylinder set ups under 8k rpm, and mean piston speed at 8k rpm in our engine is absurdly high. At 6800 rpm, mean piston speed is 20.29 m/sec which is a little more than 10% higher than what most manufacturers believe to be highly reliable. At 8000 rpm, mean piston speed is 23.87 m/sec which is approaching the limits of the highest revving factory engines. The other important factor is rod length to stroke ratio because it determines maximum acceleration on the piston which I believe will be the biggest problem with the 2UR's OEM parts. The rocker arms and the valves are so light, float is about the last thing I'd be worried about under 8k rpm. BTW, the most aggressive factory engines have ~25.3 m/sec mean piston speed. The 2UR-GSE is at 8480 rpm when it hits that speed.
Last edited by MK4Sup_isF; 09-01-14 at 09:55 PM.
09-01-14, 10:47 PM
#15
Lexus Test Driver
