think its a bad idea to have f sport rear sway and hotchkis front sways? cant find the f sport front sways anywhere. also, heard the hotchkis fronts arent all that great

 

Do you have the 250? If you have the 350 you don't really need the front only the rear.

 

get both F sport sways since they were tuned together.

 

Cuz on the 350 the F-front sway is only like 6% stiffer than stock & the f-rear is like 150% stiffer. In the 250 the front f-sway is 50% stiffer so your really not gonna tell the difference in the front sway for the 350 but you will in the 250.

PS here is a thread all about sways..
https://www.clublexus.com/forums/sus...ar-thread.html

 

Actually its 42.8% and 151.5% stiffer in the front and rear, respectively for the IS 350. Check the chart out at fsport.com

 

It used to be 6%.

It used to say the rear IS250 bar stiffened it 42.8% and the front IS350 bar stiffened it 6%

That chart changed when they added the IS-C to it, which made everyone suspect someone typoed and reverses the numbers, since it now has the same 2 numbers, but in the opposite spots.

Probably is nobody is sure if the original 6% for the front 350 bar was the error, or if this new 6% for the rear 250 bar is the error.


Personally it makes a LOT more sense that it's wrong now... because adding sways that were as described in the chart to the 250 would suck... it'd make the car understeer far worse than it does stock.

Since nobody reports results like that, the original chart is probably correct, and the current one is probably wrong.

Which means the 6% probably really does belong under "IS350 front bar"

It certainly wouldn't be the first time Lexus left a significant mistake on the web for years at a time.
(I got my ML stereo and illuminated scuff plates both free due to two such errors for example)

 

So its your word against Lexus. I'll trust Lexus thanks. You dont seem too confident in yourself; may want to use "probably" less if you wanna get a point across.

 

Try reading what you're quoting next time.

It's Lexus word against Lexus.

It originally said 6% IS350 front and 42.8% IS250 rear, and did for about a year. For the last year or so they reversed it.


I explained that the original was more likely to be correct because if the current stated numbers are correct then putting the bars on a 250 would make the handling significantly worse

Therefore the current numbers are likely wrong, since they make no actual sense.

If you need me to explain to you how sway bars work and why the handling on the 250 would be terrible with the current (probably wrong) numbers I can certainly do so, just let me know.

I then added that Lexus has been known to get their web info wrong, for long periods of time, in the past, and cited two specific examples of it. In fact, to show Lexus screws things up on the web even after fixing them- They correctly the ML error halfway through the 2008 model year.

Now it's back.

Go to:
http://www.lexus.com/models/IS/features/pricing.html


Look for the $940 option to get ML without Nav. It still lists that it comes with a DVD changer, which it does not, and which was the original error that they had fixed halfway through 2008. It only includes a DVD changer if you get it WITH the nav (For $3990)

Apparently for 09 and 10 they just copied the old, wrong, description since it's back.

 

Yea it used t say 6%, thats why I didnt get it. The rear def makes a difference

 

I actually ran just a RSB for years, so if you are buying too different brands, rear first

 

i know how sway bars work but since we just lost the hockey game ill need some entertainment. explain how the current front and rear numbers of 141.3 N/mm and 81 N/mm, respectively- as you put it, "suck" and "would be terrible" for the 250.

also, "real" oe numbers for the 250 sway bars would be great for this discussion. got those?

 

It would suck because the car already understeers when stock. The whole reason you're putting aftermarket sways on it is to change the handling away from this understeer.

If you put on a bar that was 40-something percent stiffer in the front, and a rear that was only 6% stiffer, it'd understeer more

In other words you'd be making cornering even worse than it was stock.

Which, clearly, the 250 bars do NOT do based on every review I've ever seen of them.

Hence why it's likely the original #s Lexus posted are the correct ones, and the current ones are not.