[TrackClub]

Originally Posted by Yanbags

I am here! On my second set of DS1.11 because I loved them so much the 1st time around. In my personal experience, I am finding that they have really great pad life and are not harsh on rotors. Pad taper does happen with track use, but I think it's going to affect any pad with this caliper if you are hard threshold braking. The car is not my DD but has plenty of street miles and I think they are totally fine for it. They are 100% usable in colder temps. Definitely dusty and a bit noisy but not an outrageous amount like the school-bus-esque set of Pagids a friend of mine has on his 997. I did experience "brownbo" on my 1LE letters, but IIRC - it was from when I tried out the ST-43 pads.

Similar experience to TrackClub - I was not happy with ST-43 performance. They lasted long, but temps seemed too hot (did not measure), had pad fade, and I just didn't jive with the overall pad behavior.

Hey, great feedback. How much and where do ya source them from? And how many track days did they last?
Thanks!

[Yanbags]

Originally Posted by TrackClub

Hey, great feedback. How much and where do ya source them from? And how many track days did they last?
Thanks!

Last order was $506 shipped to me from KNSBrakes. Man that hurts to write...I just paid $200 for a set of street pads and rotors on all 4 corners for my NA Miata...

To be honest I did not keep track of how many days they lasted, so I don't want to give you a random guess.

[Zl1+911]

Ds1.11 is showing as $770 for a full set. Man that’s expensive. The DTCs are much cheaper...

[GunMetalGrey]

Originally Posted by RUQWIKR

No, the ZL1 calipers do not. The caliper body up front is the same as the V3 CTS-V (J6H) and J57 CCB calipers (C6 / C7 and Gen5 Z28).

My J6H ZL1 1LE front calipers have the J57 vented pistons in them - put in there by yours truly. As FYI, J57 rear calipers for the above vehicles do not have vented pistons.

Does anyone have any idea how much of an improvement these vented caliper pistons make and if they are worth it?
I called Racing Brake about this and they were totally useless

[GunMetalGrey]

Originally Posted by Yanbags

I am here! On my second set of DS1.11 because I loved them so much the 1st time around. In my personal experience, I am finding that they have really great pad life and are not harsh on rotors. Pad taper does happen with track use, but I think it's going to affect any pad with this caliper if you are hard threshold braking. The car is not my DD but has plenty of street miles and I think they are totally fine for it. They are 100% usable in colder temps. Definitely dusty and a bit noisy but not an outrageous amount like the school-bus-esque set of Pagids a friend of mine has on his 997. I did experience "brownbo" on my 1LE letters, but IIRC - it was from when I tried out the ST-43 pads.

Similar experience to TrackClub - I was not happy with ST-43 performance. They lasted long, but temps seemed too hot (did not measure), had pad fade, and I just didn't jive with the overall pad behavior.

Thanks for that info, I may give them a try after my DCT 70’s wear out since they sound reasonable in terms of street use, but I’m not really sure what advantage they would have over the Hawks

[TrackClub]

Originally Posted by GunMetalGrey

Thanks for that info, I may give them a try after my DCT 70’s wear out since they sound reasonable in terms of street use, but I’m not really sure what advantage they would have over the Hawks

Hopeful advantage would be less heat. Dont forget, as much as shims, vented pistons, etc may make some difference, the heat will still be generated and has to go somewhere. Those components dont reduce heat, just protect calipers a bit better. Also dont forget, that heat generated by the brakes has a direct affect on tires, hubs, etc.

[TrackClub]

Originally Posted by Yanbags

Last order was $506 shipped to me from KNSBrakes. Man that hurts to write...I just paid $200 for a set of street pads and rotors on all 4 corners for my NA Miata...

To be honest I did not keep track of how many days they lasted, so I don't want to give you a random guess.

Understood. For that kinda coin i will stick with stockers for damn sure

[weemus]

Originally Posted by RUQWIKR

No, the ZL1 calipers do not. The caliper body up front is the same as the V3 CTS-V (J6H) and J57 CCB calipers (C6 / C7 and Gen5 Z28).

My J6H ZL1 1LE front calipers have the J57 vented pistons in them - put in there by yours truly. As FYI, J57 rear calipers for the above vehicles do not have vented pistons.

So your running the vented C7 Z06 pistons? Anything needed others than the pistons themselves? I’m assuming all else is the same.

[weemus]

I’m with TrackClub on good fluid. I picked up some SRF, my recommendation, from Discovery Parts when I was tracking at AMP (Atlanta Motorsports Park). They had quite a bit on hand. Ron I believe, he is awesome.

https://discoveryparts.com/racecar-s...rol-12512.html

Also I’ve run my OE pads well past the center rib at VIR (Virginia International Raceway) until there wasn’t much left on the backing plate with stock 1LE ducts and SRF without issue. I’ve also run the SS cooling ducts with SRF and OE pads at CMP (Carolina Motorsports Park) and had fade. Driving style/skill and track itself all play a roll. One does need to set up the car to perform properly and without fail at your home track. I would suggest adding in a single, mid session cool down lap until you have it all sorted. It makes a difference.

[RUQWIKR]

Originally Posted by weemus

So your running the vented C7 Z06 pistons? Anything needed others than the pistons themselves? I’m assuming all else is the same.

Yes - but the same pistons are in all front J57 CCB applications (C6, C7, Z28). Seals are the same for CCB or non on the big fron 6-piston Brembos.

[cdb95z28]

I run the C7 ZO6 calipers with the vented pistons. I rebuild my calipers with the Centric seal kit. One kit does one caliper.
Part # 143.35037


https://www.rockauto.com/en/parts/ce...epair+kit,1720

[RUQWIKR]

Originally Posted by cdb95z28

I run the C7 ZO6 calipers with the vented pistons. I rebuild my calipers with the Centric seal kit. One kit does one caliper.
Part # 143.35037

The J57 CCB vented pistons are decently cheap off Amazon if someone wants to stick them in ZL1 front calipers. Comes with the pressure seals, but, you can reuse the ones in your calipers if good. PN 19207043 (corrected, I hope). Even cheaper if you have a Delco wholesale hookup like some do.

[weemus]

Great to know. When it’s time for the rebuild I’ll go with the vented pistons.

[GunMetalGrey]

Originally Posted by RUQWIKR

The J57 CCB vented pistons are cheap at about $115 per front caliper off Amazon if someone wants to stick them in ZL1 front calipers. Comes with the pressure seals, but, you can reuse the ones in your calipers if good. PN 23242510. Even cheaper if you have a Delco wholesale hookup like some do.

Any reason to think they are not as good as the Racing Brake option which is definitely more expensive?

Also how does one check and determine when the right time to rebuild their caliper is other than when it’s already too late and It’s leaking fluid? In other words to be preventative instead of reactive?