I installed drilled brembos on the front of my Gsr today. I then drove it around to test them out. Now theres a knocking sound from the pass. side when Im coming to a stop. The harder I push them the louder it is. I took the wheel off and looked everything over and it looked fine. Its starting to drive me crazy. Any suggestions?

 

rotor already cracking? cheapo brand w/ holes not drilled exactly on center, or something of that ilk?

 

What kind of knocking sound? Like just a gradual hissing/scraping when you brake? or actually a 'clunk clunk' type thing?

Did you break-in or bed your pads and rotors? I usually do this bedding procedure from Stoptech:
"There is only one way to prevent this sort of thing - following proper break in procedures for both pad and disc and use the correct pad for your driving style and conditions. All high performance after market discs and pads should come with both installation and break in instructions. The procedures are very similar between manufacturers. With respect to the pads, the bonding resins must be burned off relatively slowly to avoid both fade and uneven deposits. The procedure is several stops of increasing severity with a brief cooling period between them. After the last stop, the system should be allowed to cool to ambient temperature. Typically, a series of ten increasingly hard stops from 60mph to 5 mph with normal acceleration in between should get the job done for a high performance street pad. During pad or disc break-in, do not come to a complete stop, so plan where and when you do this procedure with care and concern for yourself and the safety of others. If you come to a complete stop before the break-in process is completed there is the chance for non-uniform pad material transfer or pad imprinting to take place and the results will be what the whole process is trying to avoid. Game over.

In terms of stop severity, an ABS active stop would typically be around 0.9 G’s and above, depending on the vehicle. What you want to do is stop at a rate around 0.7

to 0.9 G's. That is a deceleration rate near but below lock up or ABS intervention. You should begin to smell pads at the 5th to 7th stop and the smell should diminish before the last stop. A powdery gray area will become visible on the edge of the pad (actually the edge of the friction material in contact with the disc - not the backing plate) where the paint and resins of the pad are burning off. When the gray area on the edges of the pads are about 1/8" deep, the pad is bedded."

If that doesn't help, make sure your caliper is working properly, check to make sure everything is torqued down properly. Sometimes if you replace the rotors and not the pads you can experience funny sounds and stopping behavior because the pad isn't flat and doesn't come into contact with the rotor as uniformly as a new pad.

 

Thankyou for the information.

 

you're not going to give us more info so we can help you? whatever, it's your car.

 

He got it fixed. He had to goto work I told him to post up what he did when he gets home.

 

diggin your avatar, but not the pickup.

 

I swapped the rotors from pass. to driver and vice versa and then the inner pads and it doesnt do it now. ?????