Hi all, Sorry. Realized I never introduced myself. I just recently acquired a 1989 Rosso Corsa TR. Great price! I am in my early 30s, 1st gen guy, who always dreamed of a TR. life took some good luck induced turns, decided to get one for myself and because I think it’ll be an appreciating asset/garage queen. Anywho, my problem: purchasing the car (from other state) a front installed BBK kit was not mentioned, but the guy inspecting the car said brakes were just re-done. I took that as meaning, brake pads, etc. regular brake work. My fault. I drove the car and at low speeds when hitting the brakes I hear a loud squeal and sometimes a grindy clunky sound. took a look thinking maybe grease wasn’t applied to behind the pads, but then I noticed that there’s barely any clearance between the BBK caliper (Tar-Ox 6) and the drum (face clearance looks fine). See atttached pictures, looks to be between 3-5mm. I was able to stick the rear thick end of a butter knife from behind the wheel between the drum and caliper. is this enough clearance? Could this be the issue? Image Unavailable, Please Login Image Unavailable, Please Login Image Unavailable, Please Login Image Unavailable, Please Login Image Unavailable, Please Login
It is plenty but wheel weights could be close depending on what kind wheel weights used and what type. Groan can be from several things. Most likely just pad on rotor. More likely when pad one on rotor is different from pad 2 on rotor. Pad compounds and pad transfer can cause noises and pedal feel changes that really do not effect performance. The more critical thing is did the person making the BBK match the Caliper to the master cylinder for a good working system. If that BBK kit is known then probably fine. I see guys using porsche calipers put on ferrari saying works great because they fit. There is more to it than that. If the BBK you have is not a known kit report back here and I can give you some direction as to whether the BBK you have works with what you got. There are ways to field test the brake system.
I feel if those were rubbing you’d definitely see scrape marks on the wheels. It looks like the new brake pads might be scraping the unworn part of the rotor. Maybe that’s what you hear? Oh they are slotted. Maybe it’s just settling in?
I might just need to bed these pads and/or grease the rear of the pads. the BBK kit is known and looks like bespoke for the TR: https://www.taroxbrakes.us/product/front-tarox-brake-kit-ferrari-testarossa-ii-4-9/
Sounds like you need to do some more serious inspection -- e.g., these "kits" often use another adapter piece between the steering knuckle and the caliper = just more bolts/bolted connections that might be loose or not sized correctly, wrong length bolts, etc.. Those "crustified" caliper mounting bolts (with no lock washers) in your picture don't exactly inspire confidence...
thank you for your little introducing. but what is your technical knowledge? this would help us to help you. so as I read your problem I think you are not a beginner? what drum you mean? the inside side of the rim? from the front ( so where the BBK kit is installed) ? both sides or only 1 side? remove the wheels and have a look exactly, somewhere you may see scratches what about when you go faster? check the wheel bearings
just slightly past beginner haha. And can learn pretty quickly. Most technical work I’ve done is install suspension parts, CAI, and exhaust (not on this car). Nothing beyond that in difficulty. And yeah the wheel drum/inside of rim. from the front I mean the calipers have enough clearance from the front of the face/not an issue there. and yeah I don’t see scratches on or in the drum, and brake sounds don’t come up if I am stopping from a high speed (if I am in 4th or 5th gear, no major noise)
thanks for the answers so remove the pads, clean the surface what touch the disc with sandpaper and break the edges
Caliper diameters have to mate with M/C diameters to work well! The factory engineers the system for a reason.
