froggy47

What do you think? Normal?

With the exception of these minor grooves The pads are 100% OK for street/auto so far as I am concerned.

Comments?

ErnieN85

link doesn't work
however HP+ does seem to make ripples in the rotor, it seems to work ok anyhow i just put in new pads and let them fit themselves

froggy47

Sorry Ernie, I reposted the link, it should be ok now. Sometimes the copy/paste doesn't work right the first time.



The grooves do not seem to be any worse after a couple of events.

My guess is that there is a quality control issue on the granular size of some of the compound material they use.

Good price, though, I'd probably get them again.

KNSBrakes

I think they are overheating a bit. Seems common w/ pads that are not quite up to track use. Grooving is where hard oxides are forming and chewing up the rotor.

Scooter70

I had the same results with HP+ on my old GTO. I stepped up to a DTC pad and haven't had it happen since.

froggy47

Thanks guys this is a compromise street/autox pad, I would not use on track.

What would be a better street/autox pad in your experience(s)

mountainbiker2

Hi Bob,

Check out my thread. Basically I needed to bed in the pads. I figured it was just an autocross, and it should bed them in driving on the course. Didn't work out.
http://forums.corvetteforum.com/auto...-of-rotor.html

Steve A.

Bill Dearborn

I agree. Nothing wrong, sometimes they groove the rotors some times they don't.

Bill

Chevy Nick

Same phenomenon happened to me with those pads, I was told by experienced racers they were overheating.

froggy47

I spoke at length with a hawk tech today. He says they shouldn't do that. He thinks that cleaning up the used rotor is not enough & thinks I should have turned them. I can't really argue that, but they DID bed in ok & no glaze. They stop fine. BTW the grooves came after bedding in and b4 I did competition. Just 2 weeks of street driving.

fwiw

Supercharged111

I ran Hawk HPS on my truck and switched to Hawk LTS. I like the LTS better than the HPS, but both have caused the grooves in the rotors that you've seen on your car. Nothing I've worried myself about just yet, the pedal feel is still great.

froggy47

I have come up with a theory on this.

I did not turn the rotor so there was a small lip left behind.

The NEW pad made contact with the lip before it "broke it" and conformed it's shape to the rotor (lip) shape.

During the 2 weeks of street driving this slight uneven pressing of the pad to the rotor caused some unusual wear (for a reason unknown to me) and resulted in the slight grooves.

Now that the pad has worn & conformed to the rotor all is as normal.

Conclusion, turn rotors, don't leave lip. Or you could grind a little off the pad area where it will contact the lip.



What do you guys think???



Just got off the phone with tech support, he showed the vid to another guy or 2 at Hawk & they think it's likely the rotor wear is not uniform, probably thinner at the out edge & causing the uneven wear/grooving. I guess I should have turned the rotors, but it's really not that bad. I could throw some fresh rotors on maybe, the pads are still just about new.

Cheers!

justkickin

I run HP+ as well. I get that some times as well with fresh sets. One round of autox or some lapping and the problem goes away.

I run white box rotors so they are cheap enough to replace when ever I feel like it.

Sounds like you have a logical and reasonable theory going there.

I just wish the HP+ didn't dust so much. Oh well, the stopping power is worth it IMHO. Wheel cleaner is cheap enough.

froggy47

Yeah, guess I should have turned the rotors, but really no harm done.

Yes they are dirty pads, but (and I'm not a fanatic on clean wheels) so far I've always been able to clean them off ever couple of months or so.

joenationwide

Overheating the pad material.
I overheated some Hawk HT-10s in one session and both the rotor and pads has massive (1mm) deep grooves. Both the rotors and pads were wasted. I always ran DTC60s but they only had the HT10s in stock. I'll never do that again.
You don't run hp+ on track do you? This is just for autox right? You would want a more aggressive pad for track than HP+.

ErnieN85

Actually yes some of us do as they work fine with street tires
more agresive pads just make it harder to modulate

froggy47

Hi,

I don't think so because all I did was break them in & street drive 2 weeks b4 the event. Then when I changed wheels (a6) I noticed the grooves.

Of course hp+ are NOT track pads, except maybe for the greenest novice. Maybe.

mr.beachcomber

Unusual wear pattern for auto-xing. That the grooving appears to be from your pad's compound is perplexing also. (I've had similar grooving appear after going off line and picking up the sand and grit left there from running on concrete. Just had to clean the pads to rid myself of the embedded small stones.) The only real problem I've had with HP+ pads is the amount of dusting I get during auto-x and street driving. (I end up cleaning the wheels about every two weeks or so.)

I'm a dedicated Hawk brake pad user so I really don't have anything to recommend for auto-xing other than the HP+. You might want to contact CarboTech Adam who supports this forum to see if he has any recommendations. I know a lot of my C5 buddies use CarboTech pads and seem to be happy.

Good Luck resolving the problem.

Adam@Amp'dAutosport.com

This


Smarter construction.

Only Carbotech uses a proprietary Ceramic and Metallic brake construction, not the carbon and iron used in conventional brake systems. Since carbon and iron combine to form carbide, which is used in cutting tools, you can imagine what those brakes are doing to your rotors.

froggy47

I still have a ****ling thought in the back of my mind that something in the compound didn't like the break in or rotor and got harder than the rest of the compound. I point that out in the video.

I may try some of yours when I wear these out. Do they ever go on sale, they are a tad pricier than the Hawk.