LS - 3rd Gen (2001-2006) Discussion topics related to the flagship Lexus LS430

LS430 braking distance and brake pedal feel

Thread Tools
 
Search this Thread
 
Old 06-01-11, 04:15 AM
  #31  
fergo308
Pole Position
 
fergo308's Avatar
 
Join Date: May 2010
Location: NSW - Australia
Posts: 331
Likes: 0
Received 1 Like on 1 Post
Default

Panic stops in an LS are no issue. The brake assist is the best I've experienced in nearly 20yrs of being in the motor trade. Smash the pedal,and the car will do the rest,pulling up way faster than you ever could with your own foot pressure...


Justin...
Old 06-01-11, 05:31 AM
  #32  
Lynzoid
Lexus Test Driver
 
Lynzoid's Avatar
 
Join Date: Jun 2010
Location: RU
Posts: 823
Received 12 Likes on 11 Posts
Default

only on 03+ mate.... Cos you have the PCS option (pre-collision braking system)..
01-03 have regular abs'ed brakes..
Old 06-01-11, 08:01 AM
  #33  
thinkin
Pole Position
 
thinkin's Avatar
 
Join Date: Oct 2009
Location: Land of Oz
Posts: 251
Likes: 0
Received 4 Likes on 4 Posts
Default

All domestic LS430s have brake assist, Lexus added it with the LS400 in 2000. PCS started in '04. Do Australian units not have it?

This is from the '02 library:

http://www.lexus.com/cpo/model_library/LS/2002.html

- Four-sensor, four-channel Anti-lock Braking System (ABS) with Electronic Brakeforce Distribution (EBD) and Brake Assist[3]
See 2000 reference here.

http://web.archive.org/web/200807052...ticleId=115368
Old 06-01-11, 08:21 AM
  #34  
Lynzoid
Lexus Test Driver
 
Lynzoid's Avatar
 
Join Date: Jun 2010
Location: RU
Posts: 823
Received 12 Likes on 11 Posts
Default

Yes, but what you described (smashing the pedal and car doing the rest) sounds more like PCS to me )
Old 06-01-11, 09:45 AM
  #35  
jayclapp
Lexus Champion
 
jayclapp's Avatar
 
Join Date: Oct 2007
Location: AZ
Posts: 2,489
Received 104 Likes on 85 Posts
Default

Originally Posted by Jabberwock
I agree - not worth getting into it with strangers on the street unless its a life or death thing. Just to clarify I was not trying to provoke anything or to be a hard guy with this dude. But given how weird the event at the intersection was - we were just very curious as to who was driving the truck - I was thinking maybe a very old person or a teenager texting - something like that. Then when I saw the jailbird looking guy acting nervous it just clicked as to what had just likely happened. If he had made any physical move toward us we would certainly not have engaged if at all possible.
I agree. Best thing to do in these instances is to get away from those people. Too many nuts carrying guns in AZ that would just as soon shoot you as to look at you. Recent incident where two guys got out of the cars at the intersection, started shooting and one was killed.
Old 06-01-11, 02:07 PM
  #36  
thinkin
Pole Position
 
thinkin's Avatar
 
Join Date: Oct 2009
Location: Land of Oz
Posts: 251
Likes: 0
Received 4 Likes on 4 Posts
Default

Originally Posted by Lynzoid
Yes, but what you described (smashing the pedal and car doing the rest) sounds more like PCS to me )
That's what they call Brake Assist.

http://en.wikipedia.org/wiki/Emergency_Brake_Assist
http://www.lexus.com/models/LS/featu...aking_ecb.html

PCS activates before you even touch the brakes.

http://www.lexus.com/models/LS/featu...ystem_pcs.html
Old 06-01-11, 06:45 PM
  #37  
Bocatrip
Lead Lap
Thread Starter
 
Bocatrip's Avatar
 
Join Date: May 2006
Location: Fl
Posts: 3,578
Received 269 Likes on 226 Posts
Default

Originally Posted by thinkin
Ok then I assume the early LS430s have brake assist which senses when the driver is having an emergency stop situation and exerts the brakes to the fullest. That puts my mind at ease. Should I try it on an isolated street?? I'll probably end up locking up my brakes permanently...

Last edited by Bocatrip; 06-01-11 at 06:54 PM.
Old 06-02-11, 06:16 AM
  #38  
jayclapp
Lexus Champion
 
jayclapp's Avatar
 
Join Date: Oct 2007
Location: AZ
Posts: 2,489
Received 104 Likes on 85 Posts
Default

Wow. I thought I knew everything about my 04 UL, but now I find out about brake assist. This car never ceases to amaze me!
Old 06-04-11, 02:17 PM
  #39  
GLIDESUL
Lead Lap
 
GLIDESUL's Avatar
 
Join Date: Mar 2009
Location: Md
Posts: 665
Likes: 0
Received 2 Likes on 2 Posts
Default

O the freeway the other day and I had to come to a quick stop from like 60 to 0 and I was impressed. The idiot in front of me in a 94 legend slammed on brakes so hard he almost was sideways on the guardrail. The LS stoped in a straight line. I guess the aren't as bad as I thought after all. But not the best way to find out thoo.
Old 06-04-11, 06:02 PM
  #40  
yuri.ber
Lead Lap
iTrader: (7)
 
yuri.ber's Avatar
 
Join Date: Sep 2008
Location: NY
Posts: 582
Likes: 0
Received 5 Likes on 5 Posts
Default

Originally Posted by HiloDB1
If you want better stopping distance buy better tires with more grip. It makes less of a difference especially on cars with ABS.

High performance cars use much larger wheels and tires with more grip to take advantage of the brakes and for brake fade.
That's exactly what I did, even posted here:
https://www.clublexus.com/forums/ls4...-and-pads.html
Tires are Michelin Pilot Sport A/S Plus.
After a year and a half the rotors are fine and a stopping power is much better then stock.
Old 08-07-11, 04:29 AM
  #41  
bfg23
Driver
 
bfg23's Avatar
 
Join Date: Dec 2010
Location: Aus
Posts: 141
Likes: 0
Received 3 Likes on 2 Posts
Default

I have recently installed new rotors and pads, and just today bled the brake system, but still have that spongy feel to the pedal.
I know the brakes are supposed to come on smooth, but the top half of my brake pedal is a bit of a dead spot. All that happens for the first half of the pedal travel is the brake light comes on.
I dont even feel it start to bite until the bottom half of the pedal. I would have thought bleeding the system would rectify the problem, but apparently not.
Any solutions? SS lines?
Old 08-07-11, 06:10 AM
  #42  
fergo308
Pole Position
 
fergo308's Avatar
 
Join Date: May 2010
Location: NSW - Australia
Posts: 331
Likes: 0
Received 1 Like on 1 Post
Default

That sounds like there's still an issue with the system dude. There should be some 'freeplay' in the pedal but nothing like half of the travel,especially with new discs and pads.
I suggest you re-bleed the system manually both at the master,and at the wheels to make sure there isn't any air trapped anywhere. If it doesn't improve after that I'd be looking at replacing the master cylinder.
Braided lines won't hurt the cause,but they're unlikely to make a marked difference.

What pads did you put in? Std bendix have pretty average efficiency,the set I had in my car previously needed a lot more pedal effort to pull the car up than the TRD pads I'm running now.


Justin...
Old 08-07-11, 06:15 AM
  #43  
Lynzoid
Lexus Test Driver
 
Lynzoid's Avatar
 
Join Date: Jun 2010
Location: RU
Posts: 823
Received 12 Likes on 11 Posts
Default

Brake hoses + brake cylinders. Overhaul them.
Pedal feel will return.
Old 08-07-11, 09:46 PM
  #44  
bfg23
Driver
 
bfg23's Avatar
 
Join Date: Dec 2010
Location: Aus
Posts: 141
Likes: 0
Received 3 Likes on 2 Posts
Default

I got rotors from myplanetlex dot com and ended up getting bendix pads. I originally wanted the EBC redstuff, but didnt want to wait several weeks, as apparently the reds are on back order from EBC.
I opted out of the TRD or Endless, because....well.....I dont like the idea of paying a few hundred for pads.

Ill try re-bleeding the system. My old man helped me out and he was adamant that the master cylinder does not need bleeding at all so that didnt get done.
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Rottingman
LS - 3rd Gen (2001-2006)
11
04-04-16 05:07 PM
jbbreeden
LS - 3rd Gen (2001-2006)
2
01-27-08 02:51 PM
ultra63
LS - 3rd Gen (2001-2006)
11
06-20-05 10:36 AM



Quick Reply: LS430 braking distance and brake pedal feel



All times are GMT -7. The time now is 01:07 PM.