They are located directly on the turbos. 300zx have internally wastegated turbos
Parallel.
It's almost impossible without removing the engine, unfortunately.
That depends on which model you have, but it either used a Garret T3 ('84-'87) or T25 ('88-'00). -------------------------------------------------------------------------------------- On the 1990-1996 Nissan 300ZX (Z32) the stock turbos are two (2) T25 turbos. Note: The automatic transmission models come with a smaller Turbine A/R than the Manual transmission. So, the automatic's turbos might spool a tiny bit faster, but will die off sooner in the higher RPM's I have no knowledge of the previous model 300ZX's turbos, sorry. For more info or details e-mail me at Dream300ZX@gmail.com
They are bolted to the exhaust manifolds, pretty much hugging the engine on the outside of each head.
Yes, it is only the pistons that are different to provide a different compression ratio (higher in the NA). Be careful when bolting turbos to an NA motor.
The turbos can be removed and replaced with an upgrade. So surely you can remove them out and run the car w/o. The question is, why would you want to?
yes they are both vg30s the same block. The difference is the turbos.
t/3 t/4 turbos , should be efficient enough.
what is the question? If you are asking if you can, the yes, if you are asking if it is difficult, yes again, if you are asking how, you have to disconnect the motor from the transmission and lift the motor so you can get to the turbos(on the bottom of both sides of the motor), and replace them from there. ------------------------------------------------------------------------------------------------ This question is stupid. Anyone who has a 300ZX TT knows the car enough to know the answer to this. I bet some idiot from Wikianswers.com is going around asking stupid questions.
9G
If the center housing seals are bad, you will see white smoke coming out the exhaust. Otherwise you'll probably have to get it diagnosed by a mechanic.