argh.. just typed my reply and lost it
Anyway...
Thanks for the input, if there is enough interest perhaps there may be some group discount?
My other thoughts was, i have been reading up on diffs and apparently clutch type diffs require oil, and it requires to be changed every 2000 miles. Does this mean the gearbox oil changed every 2000 miles? or the actual diff? if it's the gearbox oil it's not really too much of a problem as it would be good practice to keep the gearbox oil fresh however if this means the actual diff can you imagine getting the gearbox removed and dissasembled every 2000 miles just so you can change the diff oil?? Servicing costs... Hello!!
My other thought is. What is the difference between stock and 4.23? Night and day difference?
And what is the difference between stock and 4.429? omg!!!???
And then the difference between 4.23 and 4.429?
Basically i'm trying to justify the cost of replacing the diff. If the difference is holy ***** then i can justify it, if it's only yeah bit better then hmmm... push it down the list couple places.
What i also need to keep in mind. the Nsx is a supercar, realisticly i will never get to do the top speed legally however that is beside the point, it is more of a talking point, my car can do xxx mph. I think as the Nsx is in the class it's in it needs to be able to hit at least a certain top speed even if you will never do it. This is making me wonder what my top speed will be with a 4.429 gearing, UK NA1 with the 5 speed tranny and the 16", 17" wheel setup?
I also need to keep in mind that some point i would like to change the wheels and go bigger which means i will loose acceleration and gain back top end. This means i wouldnt want to spalsh out for the 4.23 and then change my wheels and my acceleration is back to almost stock. So this would also drive more towards the 4.429.
My other Question is very important i think, what about the speedo? where is the speed sensor? does changing the final gear ratio make the speedo in accurate?