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Sorry for the delay post, Got them from a local pick and pull yesterday. Thanks for all the help!

If anyone has the rear calipers and brackets for sale I would greatly appreciate it.

And I understand how saving weight on rotational mass is better for the car but all the fracture points seem to make it not worth it.

how come all the F1 cars run just solid rotors?

I've been reading up on a lot of this and it's been shown that crossdrilling rotors don't help dissapate heat but they allow for the vented gasses to pass inbetween the rotor so it does not form a layer and cause brake fade. Drilled rotors just give more points where it can crack. It just looks cool thats about it thats probably why both those companies run it. I know not many people have cracked their rotors but it also reduces the area in which the pad can hold onto it too so braking is less effective while cooling is minimal. The brakes today are of better composition so a lot of time crossdrilling isn't even needed. Lots of racecars today don't even have drilled and slotted rotors. I've read that vented is the best option, more area to clamp, more surface area to cool, reduces rotational mass. Are the rotors for the 200sx and 280zx the same size? I've been trying to find numbers but can't find any. This is for the 82-83 rotors of a 200sx because they are supposibly bolt on in a 280zx

Does no one know the weights for the calipers or does it really not matter at all?

I already understand the different brake upgrades for the ZX, and the stock ZX brakes are good enough to handle a lot of driving, but my question deals with the weight of the caliper. Which of the two (200sx or 280zx calipers) weigh less? Both are similar in performance so I think it would be ideal to go with the one that weighed less? Also which rotors were better the 200sx or 280zx rotors. They are the same diameter but people keep telling me the 200sx are soild while 280zx are vented (even though online parts show both are vented.) I've read this article that the new age slotted and drilled rotors really didnt help much as it increased points on the disc where it was able to fracture, and the only real advantage to discs is to be vented. Is this true?