Track Pads for Stoptech st60/st40

[dozaiya]

Originally Posted by skxf430

If you are boiling fluid, you don't need shims and just use better fluid like Brembo, Endless or Castrol SRF.

PFC08's have been replaced by PFC11's which are quite good but some mention they are a bit harsh on rotors.

Endless ME20's are very good for both street and track duty. Also, Ferodo and Race Technologies make good pads as well.

forgot to mention i was already using endless rf650, and since torque rt700 is not available in my region, my only choice was to get shims, brake ducts, or brake more gentle, and i opted with shims first

[dparm]

Originally Posted by PrimeBMW

I would suggest "if" going with stoptech the ST-60 front only. I don't think the st-40 front makes any since. With that said I am not impressed with stop tech. The braking performance isn't much better than OEM other than larger pad life. Plus there is more pad knock back than I would like. My AP Racing (euro version) performs much better. Food for thought.......

Huh? I think you're in the extreme minority on that one.

On a stock car with street tires (even aggressive ones), the ST40 kit is a great upgrade. Mine has been absolutely fade-free unlike the stock stuff that would give out after 15 minutes.

I have not experienced pad knock with the StopTech pads or DS2500s.

[bigjae1976]

Originally Posted by ///Mobbin

I never ran the stock setup on this car but IMO the ST-40's definitely have some fade resistance vs stock. They do include true two piece multi-vane rotors at least (and make pad swaps easier). That said I have experienced some fade with them. Texas heat, track almost to myself, about 22-23 minutes in to a session on a shorter course with reduced brake cool down periods, Motul 600 and ST-40 PFC08 fronts, Stoptech Performance OEM rears, I boiled my fluid pretty good. Same track upgraded to Castrol SRF, adding PFC08 OEM size rears, and Ti shims up front, no issues. I maybe had a soft pedal at the end of one session but it was quite manageable. (I really think having the rear track pads helped the most.)

Then that same setup at COTA was fine but I was managing my brakes slightly. Benefit of going for larger rotors and maybe even both the front/rear ST-40 combo will be that you can manage your brakes less.

Another option, some of these pricier BBK's come with 372mm front rotors instead of 380mm and they may fit under your wheels more easily. Price for both front/rear kit will eclipse Stoptech though.

Tough call I know, happy to answer any questions!

You do get some added friction area with the ST60 kit but your consumable costs are way higher. Pads, discs, caliper parts...I'd go with an ST40 front kit if I had to do it again.

Then 18s are a PIA with the ST60 kits. The OEM 18s fit but its pretty close.

[gan1hck]

Originally Posted by bigjae1976

You do get some added friction area with the ST60 kit but your consumable costs are way higher. Pads, discs, caliper parts...I'd go with an ST40 front kit if I had to do it again.

Then 18s are a PIA with the ST60 kits. The OEM 18s fit but its pretty close.

After a lot of flipping and flopping, I wound up ordering ST40's for all four corners for my e90 M3 that I daily drive also.

[bigjae1976]

Originally Posted by gan1hck

After a lot of flipping and flopping, I wound up ordering ST40's for all four corners for my e90 M3 that I daily drive also.

The good thing about this setup is you can rotate pads and all you need to bring is 1 set as a spare.

Best of all...I've always found pads in a pinch for the ST40.

[gan1hck]

Originally Posted by bigjae1976

The good thing about this setup is you can rotate pads and all you need to bring is 1 set as a spare.

Best of all...I've always found pads in a pinch for the ST40.

You just listed a couple of factors that ultimately led me down the path that I went.

I may possibly be leaving some lap seconds on the table, but totally worth it for the trade offs in the upgrade.

[///Mobbin]

The ST-40 front rotors are 355x35mm thick vs 360x30mm thick stock, plus being multi-vane and true two-piece. Then it will also be super easy to swap pads now, good decision and enjoy the new purchase!

[4M]

I used PFC11s all around. Very happy with performance and durability.

[gan1hck]

Originally Posted by ///Mobbin

The ST-40 front rotors are 355x35mm thick vs 360x30mm thick stock, plus being multi-vane and true two-piece. Then it will also be super easy to swap pads now, good decision and enjoy the new purchase!

Thanks!!!

I can't wait to get back on the track!

[gan1hck]

Originally Posted by 4M

I used PFC11s all around. Very happy with performance and durability.

ST40 in all four corners?

[4M]

Had ST60 up front -

[bigjae1976]

I would try the Stoptechs SR34s if you like the PF01s. Cheaper and just as good.

[PrimeBMW]

Originally Posted by dparm

Huh? I think you're in the extreme minority on that one.

On a stock car with street tires (even aggressive ones), the ST40 kit is a great upgrade. Mine has been absolutely fade-free unlike the stock stuff that would give out after 15 minutes.

I have not experienced pad knock with the StopTech pads or DS2500s.

Again, you should not be experiencing fade with either the OEM brakes or a BBK especially if you are still on street tires(you shouldn't on R-comps either). The pads you listed are autocross/street performance pads. No wonder you are getting fade. Run a cobalt XR-2 and that will never happen OEM or BBK. Pad knock back can happen from banging the curbs or high lateral G's and is significant with the Stop Tech kit and my driving. My AP kit is much better in this regard.

[amolaver]

I'd highly recommend Hawk's dtc60 or 70 compounds. I raced on Hawk blues for a long time but they just had a hair too much initial bite and I found them a little numb right at the limit. Tried carbotechs, hated them. Super annoying bed process, way more pedal pressure accompanied with longer pedal travel so it took longer from pedal application to max decel. Tried the cobalts and just never seemed to be my goldilocks - either way to much initial bite (way more than hawk blue), or not enough and then they'd fade anyway. Padgids I've had nothing problems with. Porsche guys seem to love them, but on my stoptech st40'd 350z, I tried two or three compounds and all either flat out faded or faded and smeared pad all over my rotors.

On my spec miata, the 60 is perfect (I run them front and rear). On my st60 m3 (stock rears) , I'll probably try the 60's all around first, but am guessing I'll wind up with the 70's up front, 60's rear.

BTW, hunt around, there is some really good deals on tilton's tsr-1 brake fluid (622 dry bp) in case quantity. Even their 'low end' tbr-1 fluid is (590*dry bp)... And I've used Wilwood 570 for years mostly happily.

ahm

[herrubermensch]

Originally Posted by PrimeBMW

Again, you should not be experiencing fade with either the OEM brakes or a BBK especially if you are still on street tires(you shouldn't on R-comps either). The pads you listed are autocross/street performance pads. No wonder you are getting fade. Run a cobalt XR-2 and that will never happen OEM or BBK. Pad knock back can happen from banging the curbs or high lateral G's and is significant with the Stop Tech kit and my driving. My AP kit is much better in this regard.

The key with the Stoptechs is to upgrade them if you track seriously. Add anti-knockback springs (I think the AP kits come with them standard), full floating rotors, and either titanium shims or titanium topped pistons. Then you will have a setup that rivals the PFC setups.

--Peter

[AriuSen]

Originally Posted by skxf430

If you are boiling fluid, you don't need shims and just use better fluid like Brembo, Endless or Castrol SRF.

PFC08's have been replaced by PFC11's which are quite good but some mention they are a bit harsh on rotors.

Endless ME20's are very good for both street and track duty. Also, Ferodo and Race Technologies make good pads as well.

They are endurance pads. The ones with less bite. They are terrible for time attack.
So not hard on rotors at all

[AriuSen]

Sr34