The NISMO is a direct drop in replacement for a base (non LSD) car with manual transmission.
Quaife is nice, I use one now myself, but less than ideal if track use is the primary motive (especially on r compounds), as the Quaife only works with both wheels on the ground. The problem is, Z's tend to lift the inside drive wheel and when that happens, you are back to having an open diff. The clutch type, like a NISMO, affords you adjustability in terms of lockup %, and it always works, no matter what. Downside is they are not quite as kind at very low speeds on the road (ie, 3 point turns, or pulling into or out of a parking spot). Alot can be mitigated by different fluids, but it will do it to some degree. The real upside of the NISMO is it's cheaper than the Quaife, and comes with the bearings, seals and hardware you will need as well as fluid. Quaife comes with nothing, and will require additional $$ for extra parts.
A proper diff cooler setup is going to run you way more than the diff itself, by the time you factor in the pump, lines, etc. Again unless you have an honest to god race car, it's tremendously overkill and not at all required
We stock both btw, so whichever you need, feel free to let us know
Not sure where I got the thinking that you'd need a VLSD to install a Nismo LSD Read,heard,told...
Anyway with you stating noisy and did hear it wears down the clutch/flywheel setup faster too (again not sure about how accurate that is) and that I want to take the Z on the track occasionally not every weekend. Id be hoping to use it in town without to much noise and hassle.
Nismo cheaper then Quaife? <<< How much can you sell either for?
Quaife comes with nothing, and will require additional $$ for extra parts.
Having read a few DIY's online I didn't think you needed any additonal part list, what in your mind would one need?
Those DIY's are a bit on the 'spanner, beer & throw it in' way so think I'd just take the diff out and take it to my mech and let him do the swap... was hoping to do it myself but don't want to wreck anything.
So you think It's overboard to go for a diff cooler setup? Seen that they can be gotten for 900$ odd all in, still researching that though.
Thanks for the input mate