A customer asked us recently about the different running temperatures of 72 vane discs. The customer was interested in the competition front brake kit for his new Evo X. AP confirmed the APRacing race engineers generally see a 60/70°C drop in face temperatures when comparing the 48 vane and 72 vane versions, on for instance a sports prototype race car. But these cars use full brake ducting, which is not easy to implement on an Evo because the calipers are in the way, being leading mount.
Evo X AP Racing 48 vane competition kit plus similar kits for many other cars available at :: www.part-box.com
There are also many choices of disc face types from AP Racing.
– P=Plain ( no grooves or holes ) mainly used for road cars where low noise is vital.
– G4, G8, G12 & G24 = Grooved ( straight forward facing ). The number specifies grooves per face. Traditional style groove.
– CG4, CG8, CG12 & CG24 = Curved grooves ( backwards facing ) The number specifies grooves per face. Standard pattern.
– CR4, CR8, CR12, & CR24 = Curved grooves ( backward facing running out on O/D to clear debris. only use on thick wall discs ). The number specifies grooves per face.
RD = Radius Drilled ( cross drilled but with radiused run out to reduce noise & improve life compared with standard cross drilling. Usually used on road applications.
D & SD = Cross drilled ( Drilled holes chamfered ). Still prefered with some pad materials but can compromise disc life.
GD = Grooved and Drilled ( usually used on road applications )
PG = Partial Groove. Shorter length groove pattern.
RA = J-Hook Design. Gives improved bite and debris clearance and reduces distortion/vibration, outer grooves run out to O/D. Thick wall discs only
GA = J-Hook Design. Latest design gives improves bite and debris clearance and reduces distortion/vibration, outer grooves do not run out to O/D.
RC = J-Hook Design. As RA design but with 3 hooks across face. The design gives improved bite and debris clearance and reduces distortion / vibration. Thick wall discs only.