Lexus IS-F parts wish list
 

Right now there is lots of uncertainty concerning what parts will be used. The rumor is that a Lexus rear diff will be used. If so, which one? The Lexus IS comes with two different sized diffs. The top of the line one gets a Torsen LSD.

Unless Subaru has stuffed the Lexus diff in their rear suspension, a Lexus suspension would seem to be a natural choice. The Lexus IS-F gets aluminum suspension uprights front and rear. Yay! Aluminum!

I haven't heard anything about the front suspension yet. Will it be a continuation of Subaru struts, Lexus-like SLA struts, or some sort of Toyota SuperStrut/REVO strut?

something tells me having this many lexus parts may not happen; wouldn't that lower the integrity of the is-f in some way?
i would say aluminum uprights does sound like a good choice for keeping weight down; and that extraspecial LSD might end up in a upper end ft model; as well someone on here mentioned the lexus diff was making it to this car (maybe the less advanced one that you wrote about). but i am almost positive lexus struts would never make it to this ~$22-25k car.

what struts made it into their other sports cars in the past? that may hold a clue..as of now, some toyotas are on KYB's i believe

btw: LFA is on their main lexus website now, that's unbelievable to me. right out of the gates and already showing up on their website; fast turn-around i'd say.

I doubt that the Lexus suspension components will be used. The diff. sounds feasible, but that's likely it. If Toyota is designing this as an entry level vehicle with the price point being at $20,000., it will likely have recycled/slightly modified components from existing Toyota/Subbie vehicles. The price restriction is the biggest challenge for the design/engineering team... "Make it [THIS GOOD] but you only have [this much] to spend".

If this vehicle serves its purpose (relatively mass market entry level sports), I'm sure we'll see a few more models/options in the future. I'm personally waiting for a Supra replacement... the IS-F just isn't that exciting to me.

This car will need a lsd but it won't have one because it is a $25000 car. The good news is that since it's rwd it shouldn't be too hard to take apart the rear end and install one yourself.

The Civic Si costs around 21-22k and comes with an LSD stock. If Toyota really wanted to, they could include it. Or make it a cost-option, like Dodge did with the SRT-4 (the Neon one, not the current rolling monstrosity).

Im sorry to say but Toyota is not in charge of the design, Subaru is.
Toyota is only going to modify the exteriour and interiour look to make it look like a Toyota.

Hi Mr.Tada-san, nice of you to join us.

New to the concept aren't we?

lol :bellyroll:

I really think that modification will be excellent in GT5. The Zele front bumper on the Skyline Coupe Tuned and visual brake upgrades and carbon hood hints at an amazing feature.Also the wheels look amazing, the Volks on the Clio look amazing.

wowow!

Even if lexus goes aluminum for me the cons and pro of this vehicle should be considered. For the pros it has a high-quality interior, raucous V8 power, sports-car handling, quiet cabin. For the cons it has unforgiving poor suspension, no manual transmission option, boy-racer exterior styling, common wheel hub assembly problem, and cramped rear seat.

http://media.ed.edmunds-media.com/pi...20349025-E.jpg

the poor suspension was caused by the wheel hub assembly. you are right its not that really popular because it has no manual transmission option. it's really a boring car.

Expect to see an Nissan R200 diff, or maybe an R180 if the car ends up being a torqueless wonder. I say this because the wrx has used an R160 diff since forever, and likewise with the R180 in the STi. The R180 would be a bit weak in a rwd setup, but an R200 will fit the existing Impreza rear subframe with minimal changes. Before you all go crying about Toyota this and that, Bear in mind that the R200 was the stock differential on the s13, s14, s15 and n/a 300zx so there are a wealth of aftermarket LSDs and many gearing options already available for it.

For suspension geometry reasons the lexus uprights are very unlikely, not to mention that the IS has an SLA (since we're being fancy) front suspension, and this car will have struts. Aluminum-wise though, it's entirely possible that this car will get the aluminum control arms of the STi.

Macpherson strut front, multi-link rear. Revoknuckles are pointless on a rwd car.

not really that boring. for city driving / for everyday driving it will be not boring because it is automatic transmission so no problems when you encountered traffic. but for racing enthusiast who is hungry for acceleration this is not a good choice. wheel hub assembly? how come? prove it. :iono:

The unforgiving suspension was remedied in the 2011 MY revision of the car. Check out the reviews, the car is pretty damn impressive.

From Car & Driver's Lightning lap:
I really bumped this thread to mention, that the '12 models is updated YET AGAIN. Another suspension improvement and this time will be using Shock absorbers from ZF.

ZF announced that this will not be the end of their collaboration with Toyota/Lexus and they will be providing support/parts for other projects.

Sorry to add fuel to the speculation fire, but could this be evidence towards the hypothesis that the FT will be using ZF Sachs dampers?

RE: the original topic of this thread, Please note that I don't mean the same components, just the same supplier ;)

i think so. in one of the spy videos there was a Sachs suspension truck right next to the toyota garage. so even if they dont use a Sachs suspension, they may have had a hand in tuning the suspension.

I wonder why it took Lexus/Toyota 3 years to address the suspension issues?! :iono:

They weren't "issues" to begin with. They just made it better. Every year.

They added an LSD. Then they revised the suspension, and now are seemingly revising it again. Kaizen. They listen to the customers, and respond.

The last time they revised the suspension, I believe they set out for more grip and stability. Ride comfort came along as a bonus.

Well based on the article alone and its probably his verbiage but when they state...

"Three years back, an IS F turned a less-than-impressive 3:14.0. We said then, “A little attention to springs and damping might make this eager contender a real champ,” as the stiffly sprung F zapped confidence in high-speed corners."

...that sounds like an issue. It took a car mag and post production for them to realize that especially with notable designers under this project. That doesn't sound like Lexus or Toyota at all. :iono:

Matador, thanks for the news about other projects. I am intrigued.

No prob.

Well, the MkII MR-2 was prone to snap oversteer in the hands of the average driver, and they went and changed it after the first year. I didn't consider that an "issue" either, just something that their customers saw that they would like some other way and they sought to remedy it. :iono: I would have it prefered it stayed like it was intended originally, but you know, such is life.