Roasted Dust Boots on 4 Pot Calipers

[MikeJ1033]

Attended a track day with standard GT with 4 pot factory brakes. Decent size track with some hard braking points. I have had decent luck in the past with them as far as performace. Setup included fresh Motul fluid and new Hawk Street Race Pads on OEM Rotors. This was my first experience with the Hawk pads. Went to change back to DD setup today and the dust boots are melted pretty bad. The pistons seem ok and I have no evidence of leaking. I also drove home from the event with no fade and a good pedal. I dont know if the heat transfer in the pad was so poor that it contributed to this. Also my rotors look hot spotted deposit wise (after completing bedding process prior).

My question is has anyone else experienced this, and how hard are the dust boots to replace with the rebuild kit? Should I be concerned about the caliper itself being trashed? I am inquiring here because I know there are great track associated minds on here with a lot of experience.

Thanks

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[BmacIL]

Thanks. Will keep an eye on this. Autobahn?

 

[MikeJ1033]

Yep Autobahn full course. Cool facility. Event organized by MVP Track Time. Seemed like nice folks and good instructors. The full course is decent size with some fairly hard braking zones.

Had a blast and paying for it today with melted brake components.

 

[BmacIL]

Yep Autobahn full course. Cool facility. Event organized by MVP Track Time. Seemed like nice folks and good instructors. The full course is decent size with some fairly hard braking zones.

Had a blast and paying for it today with melted brake components.

MVP is a great group. I am planning on doing an event with Chicago SCCA on July 7th there.

 

[Grafanton]

Yes. This has been exactly my experience with the 4-pot calipers. I'm also running RBF600 and Hawk Street/Race pads. Everyone will tell you to switch to the 6-pot Brembos. I personally don't think this is always the answer.

I bought a replacement set of calipers from Tascaparts.com, less than $300 including core charge and shipping, and I plan on rebuilding the old ones soon. From what I've seen online, it seems to be pretty straight forward.

I mentioned in a previous thread that somewhere I ran across a rebuild kit with SS piston cups and high-temp dust boots and seals, but now I can't find it again.

 

[PoppinJ]

Is there any chance you can post a picture of what your talking about? Ive seen plenty of people talk about this being an issue but Ive never seen it first hand. Just trying to see what to look out for. Thanks.

 

[Grafanton]

Not to be a jerk. Call me lazy, but posting photos on this site is more involved than I'm prepared for.

 

[Brian V]

You have to resize them by 50% . 1 may do it on a phone that has the capability . Photo editor .

 

[Grafanton]

I thought you had to use a 3rd party hosting site like imagebox?

 

[Grafanton]

Found this:
https://www.carid.com/racingbrake/c...-bf-41bsp.html?singleid=724534626&url=3281392

But at $330 bucks, it seems a bit ridiculous.

 

[Brian V]

I thought you had to use a 3rd party hosting site like imagebox?[/QUOTE

Not so . Go to manage attachments . Choose pic after editting . Upload . Come to your reply write up your story line and submit the post .hope this helps

 

[Grafanton]

Well crap...
I would have posted "Pictures in Race Mode" a long time ago if I'd known.

 

[DocWalt]

Dust boots will eventually do this no matter what you do:

 

[Grafanton]

Mine looked a little better than that...but not by much.

After 2 years of heavy track use, there wasn't much left.

 

[GT350Brakes.com]

I have a ton of customers including myself with the 6 piston Brembos and 2 piece discs without roasted boots.

That 4 piston caliper along with poor disc design is a massive heat sync. If you want to stick with it I’d get brake ducting and proper discs.

If not pick up the GTPP calipers which can be had for around 500 used on eBay. With the AP discs they run amazingly well.

I’ve told 50 plus people on this forum that the best bang for your buck on the non GT350s are GTPP calipers, AP discs, Ferodo pads, ss lines and cooltechs air scoop for the front brakes. If you track once a month or so this will be more than enough for your needs.

Otherwise you can go with a full AP race caliper and leave the dust boots behind.

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