Quote:
Originally Posted by etc
Ya that was the more info I was going to add. Using the calculator on the 300z swap site I ran the numbers, but left that at work 
Basically it is shifted forward slightly by the larger rotor and larger brake pads. And offset back rear slightly by the 1.6mm loss in piston size, lower hydraulic force.
From what I remember stock was something like 69.8, this is something like 70.1.
I am working from home this week watching my son but when I get back next week I will update with the actual numbers. |
First off thanks for posting. I was wondering about this swap myself
Based on the STi rotors and 42mm piston size you gave these actually shift the bias to 73.7%. OEM is 69.7%. Z32 is 70.9%.
front piston size (inches) = 1.654 and 1.654 (42mm)
front pad cf I left at .48 (street performance example)
front rotor diameter 12.8
front pad height (I left at 1.875.. not sure how to calc this so I left it at the prefilled value)
rear piston size = 1.49999 (38.1mm)
rear rotor diameter = 11.42
rear pad cf = .48 (same as above)
rear pad height = 1.25 (left at prefilled value)
Result = Front brake bias 0.737 or 73.7% to front.
Quote:
OEM
Front piston size (inches) = 1.685 and 1.685 (42.8mm)
front pad cf I left at .48 (street performance example)
front rotor diameter 11.575
front pad height (I left at 1.875.. not sure how to calc this so I left it at the prefilled value)
rear piston size = 1.49999 (38.1mm)
rear rotor diameter = 11.42
rear pad cf = .48 (same as above)
rear pad height = 1.25 (left at prefilled value)
Result = Front brake bias 0.697 or 69.7% to front.
Z32 brakes:
front piston size (inches) = 1.5925 and 1.5925 (40.45mm)
front pad cf I left at .48 (street performance example)
front rotor diameter 12.44
front pad height (I left at 1.875.. not sure how to calc this so I left it at the prefilled value)
rear piston size = 1.49999 (38.1mm)
rear rotor diameter = 11.42
rear pad cf = .48 (same as above)
rear pad height = 1.25 (left at prefilled value)
Result = Front brake bias 0.709 or 70.9% to front.
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And just to clarify as well the Z32 calipers are made by Sumitomo, not Nissan. They are good enough for R32-R34 GTS-T, S14&S15, and R32 GTR so they aren't garbage. This isn't to say Brembos aren't better just clarifying info for everyone.
The Legacy GT rotors are also $57/ea on Amazon compared to $89 but there are no two piece options if looking to shed weight.