At the drags a week or two back, when I was in the braking area slowing from 160+, I got really bad vibration and shuddering from the brakes. I think it was the front end but not completely sure.

I did three runs and noticed it everytime and even asked Magtone if he got the same thing. The track is rough at the end and has a high grip surface. I thought it might be corrugated in some way to help with braking. Because it was night you couldn't really tell. Also I thought it might be rubber on the tyres picked up on the track causing wheel balance issues, you know - like Formula 1 lol :P .

I didn't worry about it and braking at normal speeds is good. Full stopping and hard stopping no problems.

Last night I did some hard stopping on the freeway and the vibration was definitely there and concerning. I just had the car serviced a few days ago and nothing was mentioned from the service report.

I wonder whether this has something to do with EBD; some sort of effect amplified at high speed or whether I really do have a problem.

I'll talk to the Mitsu service centre tomorrow but it'll be a pain to take it back again.

Me thinks its warped rotors which generally causes vibrations when braking from 100+km/hr.

They are warped.. Breaking from 160+ usually a good way to get it..:P machine or replace disc. standard rotors will warp easy..:)

Ok, maybe it is just warping. But it feels more than that. The wheel doesn't shake like warping, it feels more like a deep vibration through the wheels and braking system and a horrible grinding :sick: . I had warping with the Verada and it didn't feel like this.

I'll get it checked out.

sounds warped to me. Mine were so badly warped before getting skimmed that it was messing around with the ABS as the pad skipped over the warped area

id bet my balls theyre warped

i had the same shudder before i got my brembos. id look for a brake upgrade including rotors and braided lines.

standard brakes arent built for 160km+....... i found that out the hard way! just lucky it happened on an empty highway at midnight

standard brakes arent built for 160km+....... i found that out the hard way! just lucky it happened on an empty highway at midnight

They should deal with that sort of speed fairly well. 296x28mm front rotors, and 302x18mm rears, with twin piston aluminium front calipers.

160!! Damn - would the discs go red then?

Joining the band wagon here - warped! heh heh :) have you tried to see if you feel shuddering as you slowly release the brake? Only other thing I can think of is if something's wrong with the hydraulic lines, but then again I ain't a mechanic. EBD problems sound like a far stretch!

Mitsu rotors = warp central.

No biggie, once they're done, get some decent aftermarket rotors.

Any strange or loud sounds with that phenomenom, only over 80kms, does it ever happen under?

They should deal with that sort of speed fairly well. 296x28mm front rotors, and 302x18mm rears, with twin piston aluminium front calipers.

my standard brakes werent anything like that! im thinking of putting them on my pushy!

They should deal with that sort of speed fairly well. 296x28mm front rotors, and 302x18mm rears, with twin piston aluminium front calipers.
not if your doing hard stops from 160+ at the drags

its warped discs. if they are badly warped invest in some slotted rotors or something that can take a bit more punishment

Warped. Although I'll add that Mitsubishi discs are NOT as bad as Subaru discs...

I'm gonna go out on a limb here....From my experience...

You've glazed them.... high speed shows the glazing up as a very strong shudder when slowing....really brutal shuddering too.....

At low speeds you don't get it at all or it's very slight... Def glazing.
If the shudder is there all the time.... They're warped.

I have had that on nearly every mitso I've owned... Easy fix...
Get the discs machined,
and de-glaze the pads if you haven't cracked or damaged them.
If you look at the discs, are they almost a mirror finish?? or really shiny??

There's your prob...
Let us know what you find

Steve

I have the same problem with my 380. Squeaks like a b!tch too

Ooo High speed braking issues.. The best type :D

When I was talking to a mate that works at Mitsu Spares about upgrading my brakes to a 380 setup he told me not to use OE pads as they are absolute rubbish and will cause glazing and other issues under 'enthusiastic' use.

Have you changed your pads at all?

Kieran

I have had the same issue ever since I got my GT, it's bad enough now that even just firm (not hard) braking from 100km/h is unnerving.

It was taken for an 'inspection' drive to sus a few warranty issues out. The guy says its rotors and a possible solution is revised pads.

I'm gonna go out on a limb here....From my experience...

You've glazed them.... high speed shows the glazing up as a very strong shudder when slowing....really brutal shuddering too.....

At low speeds you don't get it at all or it's very slight... Def glazing.
If the shudder is there all the time.... They're warped.

I have had that on nearly every mitso I've owned... Easy fix...
Get the discs machined,
and de-glaze the pads if you haven't cracked or damaged them.
If you look at the discs, are they almost a mirror finish?? or really shiny??

There's your prob...
Let us know what you find

Steve

Hmmm...that sounds like it - glazing. So maybe I'll start looking for better pads after I get this fixed.

Might have happened after the last QMD cruz :badgrin: I commented to Sports, who has in the car, that the brakes felt "soft" afterward. next day they were back to normal.

Thanks for everyone's ideas.

Hmmm...that sounds like it - glazing. So maybe I'll start looking for better pads after I get this fixed.

Might have happened after the last QMD cruz :badgrin: I commented to Sports, who has in the car, that the brakes felt "soft" afterward. next day they were back to normal.

Thanks for everyone's ideas.


The brakes were used after that event lol I dunno, might be glazed or might be warped, change the pads first to something decent to see if that fixes the problem, if it dont, change the disks to something decent lol

The brakes were used after that event lol I dunno, might be glazed or might be warped, change the pads first to something decent to see if that fixes the problem, if it dont, change the disks to something decent lol


Dont just change pads... get the rotors machined aswell.

I wonder whether this has something to do with EBD; some sort of effect amplified at high speed or whether I really do have a problem.


Knotched,

I remember we discussed something like this in another tread some time back. In that discussion I posted a link to the RPW site which mentioned the 380 was prone to serious brake fade. At the time I was advised my servicing dealer that the shudder I was experiencing, and still do, was related to the EBD operating and passing pressure to the rear wheels to cater for the front brake fade. The sound is similar to the noise made when the ABS cuts in but much more pronounced. I can make it happen regularly by breaking continually on long down hill runs especially down Victoria Pass on my way to Lithgow.

I have come to expect it now and am planning on some better quality pads when times comes to replace them. I've been watching the discussion threads on pads and discs intently to get some information for the day it is required. Mitsu pads are a no-no from the next change. Discs may be swapped out for some of RPW's slotted and drilled replacements. Hopefully this will also assist with clearing that annoying low speed squeal which still haunts me as well. Cheers...

Zarbs

Thanks Zarbs.

When I first felt it it seemd so unusual I thought my disc were cracked or damaged. But at speeds of 110 and below it brakes normally and strongly with no pulsing or unusual noise.

So that's why I thought maybe EBD has something to do with it because at very high speed the car is subject to an extreme weight shift.