Z32 Calipers Or Q45 Calipers

[drift freaq]

Originally Posted by UNISA JECS

Maybe you dont know this but sliding calipers are equal to 2 times the amount of pistons you see (the slider is equal to two pistons in the case of the Q45) and the amount of pistons means nothing, the reason for more pistons is to allow for a larger pad surface, the more pistons, helps put the pressure uniformly accross a larger pad.

Q45 front = 2 pistons + 2 (dual slide) = 4 piston
Z32 front = 4 pistons (quad fixed) = 4 piston
stock front = 1 piston + (single slide) = 2 piston

Q45 rear = 1 pistons + 1 (single slide) = 2 piston
Z32 rear = 2 pistons (dual fixed) =2 piston
stock rear = 1 piston + 1 (single slide) = 2 piston

*sliding calipers are times two the amount of pistons that you actually see

Q45 front brakes (CL26VF):
- Two piston sliding caliper
- 42.8 piston diameter
- 280mm diameter rotor
- 56mm wide pad
- effective rotor diameter: 280-56 = 224
- effective piston area: 42.8^2 x 2 x 2 (sliding caliper) = 7327.36
- brake torque = 1641328.64 (winner)

vs

300ZX front brakes (OPF25VA):
- Four piston fixed caliper
- 40.45 piston diameter
- 280mm diameter rotor
- 50mm wide pad
- effective rotor diameter: 280-50 = 230
- effective piston area: 40.45^2 x 4 (fixed caliper) = 6545
- brake torque = 1505350.00 (losser)

For the record I run Z32 30mm calipers on my S13 only for the better looks + I run Z33 12.76" rotors with SPL adpater bracker so my front brake torque is actually greater than the Q45 somewhere around 1793330 if you do the math.

Credit goes to ASAD from FA for putting the above info together

AH the ghost of ASAD gets resurrected. LOL . Regardless of Asads decidely over technical research which he was famous for in the end Z32 brakes are fine for our cars. Used with the correct master and Z32 rears they work great.

So though the Q45 brake might be slightly better in shear stopping torque terms for the sake of our cars its not a big enough difference. Most of these guys are not going road racing.