SETI20 wrote:The CRX I built when I was still living in Europe was lethal. For the annual safety, they have to measure brake friction per corner on a device that looks like a rolling road dynamometer. It kept popping out, so a big fat mechanic had to sit on the front end to keep it planted enough to get a measurement.
They did it 3 times because they couldn't believe how much braking torque it put out. (it was sitting on semi slicks too, so that just exaggerated the numbers)
That is great, would have loved to see that! I hope that the Pathfinder is a bit less touchy.
SETI20 wrote:I put some track time on those pads. The description is a little misleading. Did you read the operating temperature specs on the ones you got? Most race pads won't work for shit on a cold day.
The HC+800 is their most aggressive street pad, suitable only for light track use. Their temp range is 0-800*C. They have a high co-efficient of friction when cold, 0.43μ when cold and up to 0.58μ when warm, stock pads seem to be in the mid .30μ's, so I'm expecting them to be pretty aggressive cold. I hope they don't squeal, but I guess we will see how the behave.
SETI20 wrote:I'm a little vague on some details. Did you find that on the regular V6 patty you can run 350Z calipers and disks with a spacer? Or would I still need to go to a 2-piece rotor?
You should be able to bolt on the V8 Pathfinder/Base 370z calipers and the V8 Pathfinder rotors up without any spacers or modifications to a V6 Pathfinder. I think you would need at least 17" wheels to fit the 320mm rotor though. That does open up a wide range of more aggressive pads, and more brake torque due to the larger rotor. Now, I have no experience with the V6 set up, but I obviously don't find the V8 set up adequate so I can't say it is much of an upgrade.
SETI20 wrote:Now, there is a little caveat with a setup like this. ABS operation and brake balance. By vastly outbalancing the car front to back like this, you might run into some issues during an emergency stop. (The track examples are a little irrelevant in this case) Also the ABS system basically is tuned to a certain friction coefficient and rotation speed. It'll be a bit of a surprise to see how this pans out.
I will be doing the rear as well, to balance it front to back, or at least to help balance it. It is certainly a possibility that the pedal will feel very soft with the new brakes, but the V8 master cylinder has the same bore as the Infiniti G37's that run these calipers. I know the stroke might be different, but I won't know how it works until I try it. I had a chat with one of the engineers from SSBC about moving from a sliding caliper to a fixed caliper, and how the fixed calipers move less fluid. They make a crazy 8 piston caliper for the 99-04 F250/350 trucks that replaces the factory 2 piston. They say that it actually gives a firmer pedal feel then the stock brakes, As I understand it even though the 8 piston is much larger, it actually requires a bit less fluid overall to move all those pistons. I am hoping for the same effect in this situation.