IS F (2008-2014) Discussion topics related to the IS F model

New RCF Track edition weighs 3782 vs ISF 3780. Now 472hp 0-60 3.9.

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Old 01-15-19, 10:32 AM
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Weapon F
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Default New RCF Track edition weighs 3782 vs ISF 3780. Now 472hp 0-60 3.9.

For those that are interested here are new specs of RC-F Track edition. Some nice changes done to RCF. This how RCF should have been done first time around IMO except for carbon ceramic rotors and fixed C/F wing just offer them as option.

Carbon Fiber Roof, hood, and fixed wing.
New BBS rims that save 55lbs
New titanium exhaust
New functional Aero package
New headlights and body changes
New Brembo lighter race oriented calipers
Launch control claimed 0-60 3.9sec
Lighter and stiffer suspension including stiffer engine mounts consisting of and I quote
"At the rear, hollow half shafts are now used in place of the previous solid shafts while up front a pared down intake manifold and a smaller air conditioning compressor remove weight from the front of the car. Changing to aluminum for the toe control brackets and upper suspension support brackets also reduces weight while maintaining stiffness.

To further refine the feel of the RC F, there are now stiffer bushings for the rear suspension arms and steering rack mounts"

Overall some very nice changes but it still needs to shave off some weight for track edition. The standard RCF should have come in at 3782lbs pretty much matching weight of ISF. With track edition being closer to M4 weight wise. But its step in right direction for Lexus hopefully they continue towards more of sport focus coupe. Let LC500 be GT Coupe and RCF true sport coupe.




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Old 01-15-19, 11:36 AM
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cvt
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At least Lexus is trying. It's kinda late but better late than never. I never got in the bandwagon that the RCF was this huge mistake and that it was a bad car. It's a good car...it just didn't measure up to expectations.
Old 01-15-19, 11:57 AM
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threefiveo
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I also thought this was interesting from the press release:

It’s now rated at 472 horsepower (+5hp) and 395 pound feet of torque (+6 lb ft) thanks to a revised intake routing and lower rpm trigger point for the secondary intake opening (2,800 rpm vs 3,600rpm)
So Lexus is opening the secondary intake at 2800 vs 3,600. My understanding on the ISF is the intake is vacuum actuated. Interesting to see they are tying the operation of the secondary to actual RPM. I wonder if this is just a revised vacuum actuator that could be implemented on the ISF. From other threads, an open secondary intake all the time loses power but maybe opening a bit earlier will add just a bit.
Old 01-15-19, 12:10 PM
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Alizia
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if I wasn't sterile I would of creamed myself after seeing it for the first time

I saw some closeup pictures of the new headlights... omg they look so awesome!!
Old 01-15-19, 12:10 PM
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Weapon F
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Originally Posted by cvt
At least Lexus is trying. It's kinda late but better late than never. I never got in the bandwagon that the RCF was this huge mistake and that it was a bad car. It's a good car...it just didn't measure up to expectations.
Same here I like RCF, much better looking in person and has grown on me. Its just we were expecting sports coupe and got GT coupe that can be put on track. Just imagine 3650lb RCF with its current configuration one of last N/A V8 add set headers and exhaust not only would it sound glorious you have 500 crank plus engine capable of some serious fun I would then consider buying one.

No price out yet on track edition but i heard 100k ouch��. If that's the case there are so many track toys in that price range I couldn't justify a hundred k for it so many cars in that range. I could get the new Carrera 911 T, its drivers Focus 911 that cuts out all the bells and whistles and brings it back to Old School lighter weight cars with a manual clutch for the same 100k even though 911 T it will be down on hp 370 to 472hp thats 100hp difference between the two, but curb weight of manuel Carrera 911 T 3142lbs compared to the 3872 RCF.

I'm rooting for the RCF track Edition I hope it does extremely well maybe it will surprise all of us.

Last edited by Weapon F; 01-16-19 at 07:45 AM.
Old 01-15-19, 12:34 PM
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cvt
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I almost feel like lexus tried to soften up the RCF just because of all the flack the ISF got because of the hard suspension in the earlier models. When they did make a more comfortable GT car...everyone screamed, more hardcore!....lol.
Old 01-15-19, 12:35 PM
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I'm not sure I'm sold on the styling. They may tone it down some for production. I like the performance
Old 01-15-19, 12:40 PM
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I wonder how the shorter overall gear ratio will impact performance (3.13 ratio rear end (shortened up from 2.93)).
Old 01-15-19, 06:57 PM
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predacon47
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Originally Posted by Weapon F
Same here I like RCF, much better looking in person and has grown on me. Its just we were expecting sports coupe and got GT coupe that can be put on track. Just imagine 3650lb RCF with its current configuration one of last N/A V8 add set headers and exhaust not only would it sound glorious you have 500 crank plus engine capable of some serious fun I would then consider buying one.

No price out yet on track edition but i heard 100k ouch��. If that's the case there are so many track toys in that price range I couldn't justify a hundred k for it so many cars in that range. I could get the new Carrera 911 T track, its drivers Focus 911 that cuts out all the bells and whistles and brings it back to Old School light weight cars with a manual clutch for the same 100k even though 911 T it will be down on hp 370 thats 100hp difference between the two, curb weight of manuel Carrera 911 T 3142lbs compared to the 3872 RCF.

I'm rooting for the RCF track Edition I hope it does extremely well maybe it will surprise all of us.
I was at Lexus yesterday test driving the RCF (almost traded my 08 ISF for a 16 RCF). They gave me an awesome trade value on my F, but I couldn’t pull the trigger. Anyways, they said the new track addition will be on the market early September with a price tag of $101k MSRP.
Old 01-15-19, 10:57 PM
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lobuxracer
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Originally Posted by Vervish
I wonder how the shorter overall gear ratio will impact performance (3.13 ratio rear end (shortened up from 2.93)).
Slightly better 60' time and nothing more. With an 8 speed gearbox, there really isn't a lot of measurable gain with a lower final drive ratio once you get off the line. The engine stays in the meat of the powerband after launch pretty much all the time so gears won't help at all.
Old 01-16-19, 03:06 AM
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Jwconeil
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Launch Control would be nice. Outside of that and a carbon roof I don’t see anything here that impressed me.
Old 01-16-19, 04:05 AM
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Very nice. Is there any way to retrofit a launch control on the ISF?
Old 01-16-19, 10:52 AM
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Diesel350
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Originally Posted by predacon47


I was at Lexus yesterday test driving the RCF (almost traded my 08 ISF for a 16 RCF). They gave me an awesome trade value on my F, but I couldn’t pull the trigger. Anyways, they said the new track addition will be on the market early September with a price tag of $101k MSRP.
They will probably go for more than that considering they are only making 60 per year. It will be a super rare car.
Old 01-16-19, 11:05 AM
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Jwconeil
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They may end up sitting, despite being rare. Your going to have to really want this car to pay anywhere near 100, especially since dealers will discount the new regular model just to move it. It’s an improvement, but it’s not worlds apart from the regular model. Essentially 5 more hp, and around 200 pounds lighter (guessing)?
Old 01-16-19, 02:22 PM
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cvt
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Originally Posted by Jwconeil
They may end up sitting,
Yup, like all the F models. Service guy at my Lexus dealership say to be patient buying any F as they usually just sit


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