Replace N05U with a "right" compound. I am unsure what other pad I could try as N05U are used on Cup cars with success.
Edited by m3ap1, 29 July 2020 - 10:26 PM.
Edited by m3ap1, 29 July 2020 - 10:26 PM.
welcome to the forum!
the rotors do look like the bedding needs to either be redone or there wasn't enough heat/material transferred over. have you tried rebedding?
Edited by Johnnypbmx, 29 July 2020 - 01:07 PM.
Did RB mention what the “right compound” is? Did they provide any other advise besides seemingly that its your problem?
RB suggested I run a different compound and talk to my brake supplier for options. My brake supplier is very experienced in brake selection and noted that they have many customers run N05U with great success on heavy weight cars. N05U is a full race compound used on Cup cars with aggressive bite and high heat capacity.
Since RB wants me to run a different compound being that N05U is not up to par. What other pad compound could I try with similar or better characteristic that will work with RB rotors?
I do not have an answer, but I had the same problem with that combination. Long sequence of events, but ended up changing to brembo GT calipers, rotors and pads. Definitely great track setup, but very noisy even with softer street pads, track pads are unbearable on the street.
On stock calipers, My shudder started out with jhooks and endless me20. Went to n05us, still shudder. Put temp strips on calipers and they where close to max temp. Changed to RB rotors and a RB track pad with shudder.[looked like yours] Tried N05Us and still shudder, second set of rotors, still shudder. Only relief was endless mx72s which are not great on the track. Then shudder when track pads went in. Somewhere along the line, lost my brakes due to defective seals. Replaced seals and pistons. Multiple people tried breaking in pads. Cannot say enough about RB trying to help. Just did not work out with my car. Too many moving parts. Also changed front hubs/bearings I did a write up on current setup, but I do not know where it went too.
Hope you find solution quicker... cheaper...
I really appreciate your feedback as it seems to point me into the right direction. I do not want to keep putting money into a rotor and pad combination in hopes to find something that is judder free.
With regards to your Brembo GT calipers, what brake pad did you end up going with? N05U?
My current options:
1) Try a different rotor such as PFC/AP/Alcon using N05U pads
2) Go with a BBK such as AP Racing 9668/5000R
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Have you considered adding brake cooling?
Yes, I've considered it and am looking into a solution.
However, RB suggested to not run brake cooling on their rotors due to wanting to keep thermal temperature consistent.
Yes, I've considered it and am looking into a solution.
However, RB suggested to not run brake cooling on their rotors due to wanting to keep thermal temperature consistent.
Yes, I've considered it and am looking into a solution.
However, RB suggested to not run brake cooling on their rotors due to wanting to keep thermal temperature consistent.
I run RB but the ST carbon ceramic rotors. That surface looks really uneven. Can you run a more abrasive pad burnish that top layer then try it again? I seem to remember something about their steel rotors needing a bit more to get a good transfer layer.
In7anity!!
Edited by jhammergtr, 30 July 2020 - 11:40 PM.
Run Hawk DTC60 or 70 pads. You need to get all that pad deposit removed from your rotors though. Very hard to get rid of once it's there. Take rotors off and have them cleaned using a rotary hone on both sides and that takes a long time. The re-install and bed them in properly following Hawk's instructions. I usually do 6 mediums stops from 100 kph to warm everything up and then 6-7 hard stops from about 120-130 kph and then drive 15-20 minutes to let rotors cool down. Rotors then get a nice even blue-grey color.
I use a Flex-Hone in a drill press to clean deposits off rotors.
Here is another option for removing brake pad deposits.
https://www.youtube....h?v=5qB-jnANdTw
And get some brake cooling.
Edited by jhammergtr, 01 August 2020 - 09:58 PM.
Track pads are more of a "personal" choice and preference, which is a "try & learn" process until it's settled to your liking which opinion can be subjective therefore we prefer to stay neutral w/o giving any recommendation.
By searching this forum you should be able to learn different opinion and feedback on almost all the named track pads used against RB rotors which we offer two different set up:
One is the stock replacement disc (re-use OE hats) like this member (see bottom illustration); and one is the complete rotor assembly with RB hats (center mount design-Top illustration)
Track pads are more of a "personal" choice and preference, which is a "try & learn" process until it's settled to your liking which opinion can be subjective therefore we prefer to stay neutral w/o giving any recommendation.
By searching this forum you should be able to learn different opinion and feedback
Edited by colo_evo, 03 August 2020 - 08:05 PM.
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