Spechti
Well-known member
- Joined
- Mar 8, 2011
- Messages
- 180
- Reaction score
- 5
- Location
- Hamburg, Germany
- My Car
- 1971 Mustang Mach 1 (under restoration), 1973 Lincoln Mark IV (show boat)
Hi guys,
a week ago I bought new disc brake rotors from ACDelco (Durastop). Before installing them on the car, I installed them on a spindle on the workbench and measured them with a dial gauge for runout, etc.
Ford specifies a max. lateral runout of 0.003 inch for the 71 Mustang.
The ACDelco discs both have a runout of 0.006 inch. Also the bolt circle is out of true and when I spin it by hand, I can clearly see it not running round also in radial direction.
I contacted the seller (amazon) and got a refund. They did not even want the crap back. Now I have some nice boat anchors...
Yesterday I bought some Raybestos Professional Grade Rotors from a local parts dealer. Looking into the box, they seem to be from the same manufacturer in China.
Result on the bench for the Raybestos: one has 0.007 inch runout, the other is within tolerance with a runout of little over 0.002 inch.
What are your experiences with brake rotors? It seems the whole scrap comes from China. Are there still brake manufacturers, that care about quality?
Michael
a week ago I bought new disc brake rotors from ACDelco (Durastop). Before installing them on the car, I installed them on a spindle on the workbench and measured them with a dial gauge for runout, etc.
Ford specifies a max. lateral runout of 0.003 inch for the 71 Mustang.
The ACDelco discs both have a runout of 0.006 inch. Also the bolt circle is out of true and when I spin it by hand, I can clearly see it not running round also in radial direction.
I contacted the seller (amazon) and got a refund. They did not even want the crap back. Now I have some nice boat anchors...
Yesterday I bought some Raybestos Professional Grade Rotors from a local parts dealer. Looking into the box, they seem to be from the same manufacturer in China.
Result on the bench for the Raybestos: one has 0.007 inch runout, the other is within tolerance with a runout of little over 0.002 inch.
What are your experiences with brake rotors? It seems the whole scrap comes from China. Are there still brake manufacturers, that care about quality?
Michael
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