When to replace brake pad for track day

[shaftwhy]

Have a track day coming up, however my front brake pad is coming towards its end. Based on historical data, I won't be able to use all that for sure. But just in case, post here to ask advice whether I should get new pad for track day. Picture attached.

BTW, pad is Ferodo DS 1.11.

Thx!

[shaftwhy]

Looks like base plate plus pad is 10 mm. The pad part is probably 4mm. Maybe pushing it a little bit?

[wigaster]

Are there other places where there are chunks of pad missing? I've ran my pagids that thin but didn't have areas where the pad had crumbled off... Looks sketchy to me. Plus think about it. You are going to be worried the whole damn time you are out there about those pads and are going to be checking them after every session and for what? Squeezing an extra day out of them? I would just change em out. my 2 cents

[OhioRiderAaron]

The problem is the taper wear, which is normally difficult to see from these types of pictures. I would measure at min., but based on this picture I would probably pull them and take a look at the taper wear as well. I ran my DS1.11 down to ~2mm, but the taper was pretty bad by then. You need to be careful as you're allowing a lot of heat transfer and risk going all the way to the rotor if you're not careful.

Once I get to 60% I normally buy another set of pads (esp. if fronts), depending on the track I am going to next. Rears you can be more aggressive with since they don't wear out all that quick.

[shaftwhy]

Thanks a lot!

Didn't even realize that there is a part missing, lol. Yep, probably better to get new pads to be safe.

[MaynardZed]

Should be fine, just don’t your brakes much.

[MRV99]

Those pads will be perfect for the first session but I would bring a brand new set to swap out while there. When the pads get that thin they wear extremely fast. This has been my experience.

[CanAutM3]

Originally Posted by MRV99

Those pads will be perfect for the first session but I would bring a brand new set to swap out while there. When the pads get that thin they wear externally fast. This has been my experience.

^ This

My queue is that if the pad material is thinner than the backing plate, it is time to change. When the pad material gets too thin, there is risk of delamination (which can be quite scarry). I would bring a spate set of pads to the track and monitor the thickness of the pads on the car after every session. When the material gets thiner than the backing plate, time to swap out.

[shaftwhy]

Originally Posted by CanAutM3

^ This

My queue is that if the pad material is thinner than the backing plate, it is time to change. When the pad material gets too thin, there is risk of delamination (which can be quite scarry). I would bring a spate set of pads to the track and monitor the thickness of the pads on the car after every session. When the material gets thiner than the backing plate, time to swap out.

Thanks everybody for chiming in. I got the same type of new pads and they feel so much better. That's a big wow for me.