I recently purchased a 2000 SE Miata with 66,000 miles. This is my second NB and my 6th Miata

I am getting ready for the cars first Auto-x in a few weeks and my first in at least 5 years.
The car had a Jackson racing supercharger installed in 2003. The car has stock struts and springs and a beefier front sway bar.
This is my first boosted car so I have a few questions around the super charger and I have some general setup questions.
Right now the car has wheel spacers, is there a good reason to have these? The tires are close to stock size 205/50/15
Is there anything I need to do to maintain the super charger?
In the second picture circled in red and in the third picture is part of the supercharger system that I cannot identify.
The PO had a cold air intake and I am trying to set up a air box from pieces that came with the car.
I was told by the PO that the car needs 93 octane but I am not sure if that is true or how to tell if it does.
It does have boost/retard controller in the glove box, right now I have it at the 12 oclock position but I am not sure how to set it up.
I have not been able to find a manual for the setup.



Iamnot a Miata or supercharger expert, but hang out with those that are and am a lifelong gearhead. Know a good bit about boost in general.
Depending on quality, wheel spacers can fail, badly but may be needed for your wheel offset. If you can verify brand, youll be ok although if they are just for looks, they add unsprung weight.
Boost effectively increases your compression ratio, the fuel needs to burn slower in order to avoid knock or preignition, so it is likely you do need 93 octane. The spark happens before the piston gets to top dead center, so the more compression you have, the bigger your chances of too much explosion before the piston changes direction to come back down. Higher octane burns slower.
PS, you can bet someone will be along shortly to correct any misinformation i may have given
In reply to spicciani :
No clue on the mystery parts ...
But wheel adaptors are usually employed when the car bolt circle is different from the desired wheels (measure?).
They will also enable wheels with a different offset to fit, but the same can be accomplished with wheel spacers and custom studs/wheel nuts.
Circled pieces are crank case ventilation modifications which may or may not be part of the supercharger kit.