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Lexus Is Preparing a V8 F Car Renaissance

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Old 02-22-21 | 06:10 PM
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Originally Posted by sdls
The UR engine wasn’t designed for forced induction. It’s got a thin block casting and wet cylinder sleeves. Could they beef that up? Not economically.
Uh.......I hate to tell you but that's just not true lol! They do great under boost and fully stock internals can withstand 800 all day for 100k miles
Old 02-22-21 | 06:17 PM
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Originally Posted by EZZ
I'm interested to see how the Plaid models do at higher speeds. Quarter mile in the high 8s range is pretty fast and the new tri-motor is supposedly very different motor tech that doesn't lose much past 100mph. Also, the Taycan S has a ton of grunt at higher speeds due to the 2 gear tranny.

Also, RCF already has a kit for the V8 and it produces 670hp which isn't bad. It requires ethanol kits to make it more powerful. Its not exactly a new engine

https://www.rr-racing.com/RR-Racing-...rcfscr1001.htm
Yep, out of the gate there is already a reasonably powerful option that doesn't require any real changes. The E85 conversion is very easy and still considered a bolt on since you don't alter any internal parts. The UR has limitations when you try to build it like a hemi or LS engine or even the coyote due to how it was originally constructed being a limiting factor. It's simply not as strong as an LS/LT and has no chance vs a hemi if you go past 20 psi and I sure would explode on spool at 25-35 that the LS can handle with nothing more than headgasket and fastener changes

The electrics just are not in the game at all at 100+, simple single fords and chevys kill them severely to say nothing of built twins or builds that cost the same as a taycan or top spec S, those things pull 100-180 in under 3 seconds for the class leaders and sub 5 is very common. The record holders are truly insane to even just feel come past, the air pressure gets messed with like aircraft almost.
Old 02-22-21 | 06:20 PM
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Watching some videos of it now, it looks great. I love the power bulge in the hood, I like that on the RCF also.
Old 02-22-21 | 06:21 PM
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Originally Posted by Striker223
Uh.......I hate to tell you but that's just not true lol! They do great under boost and fully stock internals can withstand 800 all day for 100k miles
What model? 2UR-GSE? 1UR-FE? 1UR-FSE? 3UR-FE? Boost pressure? FI method? Compression ratio? Stock head gaskets and head bolts? Fuel octane?
I boosted a 1UZ-FE in the past and it handled it perfectly but it was at low boost since I wanted driveability and reliability. Figured the newer motors are a little more delicate.
Old 02-22-21 | 06:22 PM
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Originally Posted by SW17LS
Lets see how well this sells. They will sell more C63 AMGs with the 4 cyl then they will these



I totally agree, but that doesn't mean it can't be tweaked and improved on some level over the many years its been at this spec.

When do you trade your M3 in? (my guess is never).

Don't get me wrong, I'm happy they did this...its something...I would just like to see them put a little more effort into it.
You are probably right, but those cars will be forgotten unlike the original ISF that is still commanding a large aftermarket and prices.

I would have also liked to a factory TT setup with a stronger block configuration so you could just retune to 1000 on factory parts like the hellcats
Old 02-22-21 | 06:38 PM
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Originally Posted by Striker223
Yep, out of the gate there is already a reasonably powerful option that doesn't require any real changes. The E85 conversion is very easy and still considered a bolt on since you don't alter any internal parts. The UR has limitations when you try to build it like a hemi or LS engine or even the coyote due to how it was originally constructed being a limiting factor. It's simply not as strong as an LS/LT and has no chance vs a hemi if you go past 20 psi and I sure would explode on spool at 25-35 that the LS can handle with nothing more than headgasket and fastener changes

The electrics just are not in the game at all at 100+, simple single fords and chevys kill them severely to say nothing of built twins or builds that cost the same as a taycan or top spec S, those things pull 100-180 in under 3 seconds for the class leaders and sub 5 is very common. The record holders are truly insane to even just feel come past, the air pressure gets messed with like aircraft almost.
The electrics are just beginning so just a matter of time as we transition away form ICE. I expect OEMs to start adding gears to improve efficiency and high speed abilities. The one thing can't do is mod EVs though as the software is locked so production versions are extremely quick but will be limited in the aftermarket segments.

I expect very very few supercharger builds for the IS500 though. The market segment just isn't into building a rocket for drag duty...most are casual enthusiasts with money that want a cool experience. You just won't see the aftermarket attention you get from Mustangs and Camaros. Also, hard to put anything into that engine bay...looks pretty cramped in there
Old 02-22-21 | 07:08 PM
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First of all there is no chance the plaid model is slow past 100mph. This thing is going to be a rocket at any speed IMO. You don’t get to sub 9 second quarter mile times with a slow trap speed.
Old 02-22-21 | 07:41 PM
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Originally Posted by SW17LS
I totally agree, but that doesn't mean it can't be tweaked and improved on some level over the many years its been at this spec.

When do you trade your M3 in? (my guess is never).

Don't get me wrong, I'm happy they did this...its something...I would just like to see them put a little more effort into it.
I think you are underestimating the potential of the demand for IS500 if they price it right. It compares very well to M340i.
M3 is on a different level from a performance perspective and would not be fair. Having said that, the new one is a polarizing design and I would not be surprised BMW owners jumping ship to IS500.

You also have ppl that lusted for ISF but didn’t have funds back in 2010-2012 to buy one and now have the $$$ and will get this one. Again if they price it right - it should do well unless they make it some ultra rare hard to get model.
Old 02-22-21 | 08:43 PM
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Originally Posted by SW17LS
If you call putting a 14 year old engine with no changes in a 3 time refreshed model dating back 7 years a renaissance...
14 years ago the 5.0 was in the IS-F as you know, but 'only' made 416hp. now it makes over 470 so hardly "no changes".

Originally Posted by SW17LS
7 years, the RCF came out as a 2014.
I mean, they could make SOME change to at least give it a little more power.
yes it would have been nice, but 470+hp is NOT slow. as for other changes i'm sure it's been tweaked some over the years, even if it didn't officially bump the hp.

as you know, now i'm a recent new owner of a lexus with the 5.0 V8 (LC) i'm very pleased they're going to use it in another model!

people love this engine for its sound (with exhaust of course) and its free revving nature. i don't know the technical difference between the 8 speed used in the rc-f/is500 vs the 10 speed in the lc, but i'm pretty amazed at the speed of shifts in the 10 speed.

anyway, it's a good day for lexus.

i'd say the deciding factor here will be the price. with the rc-f at $68k,, i expect the is500 will start at a similar price. if it's priced a lot higher it won't sell.
Old 02-22-21 | 09:11 PM
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M340 starts at 54.7k. If they make the IS500 around the same price, its going to rain on that parade bigtime. IS500 is missing a lot of the F interior, seats, brakes, TVD, it is not going to cost the same price as the RCF did, unless you want it to with options
Old 02-22-21 | 09:23 PM
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Originally Posted by bitkahuna
14 years ago the 5.0 was in the IS-F as you know, but 'only' made 416hp. now it makes over 470 so hardly "no changes".



yes it would have been nice, but 470+hp is NOT slow. as for other changes i'm sure it's been tweaked some over the years, even if it didn't officially bump the hp.

as you know, now i'm a recent new owner of a lexus with the 5.0 V8 (LC) i'm very pleased they're going to use it in another model!

people love this engine for its sound (with exhaust of course) and its free revving nature. i don't know the technical difference between the 8 speed used in the rc-f/is500 vs the 10 speed in the lc, but i'm pretty amazed at the speed of shifts in the 10 speed.

anyway, it's a good day for lexus.

i'd say the deciding factor here will be the price. with the rc-f at $68k,, i expect the is500 will start at a similar price. if it's priced a lot higher it won't sell.
14 years ago the IS F was marketed with 4.6 0-60

TODAY the same motor designation with small changes will have a 4.5 0-60

A LOT of the IS500 is a parts bin carry over... From many existing models.. GS350 14" F Sport Brakes, existing Torsen LSD, AVS, Engine / Trans just to name a few..

There is nothing innovative / bespoke on this MY22 car, it's mostly a carry over of sheet metal and parts from the current 2021 IS as we can all see..

Enkei Wheels ??

No Brembo Brakes, No special body package and unfortunately fell way too short on what should
of been the relaunch or rebirth of the "IS F"

But atlas we get another 2UR-GSE engine slap into a new "refreshed" IS chassis that came
out in 2014... which we already knew a V8 fit over a year ago..

Even with the "space" they are leaving for the so called standalone F brand, I don't see those flying down the pipeline anytime soon.

Just my .02 ¢

Last edited by Joe Z; 02-22-21 at 10:06 PM.
Old 02-22-21 | 09:41 PM
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they can easily make all those performance upgrade bits option packages, can deck out an IS500 as much as you want
Old 02-22-21 | 10:15 PM
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Originally Posted by SW17LS
Lets see how well this sells. They will sell more C63 AMGs with the 4 cyl then they will these
Has it been confirmed that next C63 is going to be a 4 cylinder? There's no way in hell it's going to sell.
Old 02-22-21 | 10:22 PM
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Somehow I am excited for this, not being an F model but just an F sport with a hot NA V8? Count me in.

How are Lexus transmissions these days?
Old 02-22-21 | 10:23 PM
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Originally Posted by Och
Has it been confirmed that next C63 is going to be a 4 cylinder? There's no way in hell it's going to sell.
Yep a hybrid four cylinder. It's confirmed. So nasty. I hope it doesn't sell lol but knowing the modern consumers it probably will. People are obsessed with numbers nowadays. How fast the 0-60 is, how much horsepower...sad but true.



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