whats the best cold air intake system combined with the best power management system for driving an FC in the winter?

 

The best engine management system would be a custom Delphi or Magneti Marelli system. For those who are not part of a multi-million dollar race team, a Motec M880 would be the best of the off-the-shelf systems. The best intake for most applications is a bell-mouth inlet, but a divergent duct would be best for a race car that spends most of its time over 150 mph. The best intake manifold design depends on the application.

Why is Winter an issue? Do you mean below -30 F?

 

Nah Im just wondering about air intake and gas mixtures and stuff. Cause Ill be driving it around even if it is really cold as long as theres no snow or slush. A little bit of wet roads is ok as long as its not too much or its not pouring. It would be my road car for a while until I buy a series 8 FD in a year or so and then the FD would be my road car and the FC Id used for the track

 

LOL, I thought you were asking a question about performance. Your car is over 20 years old and may have survived more winters than you have. It came from the factory with a cold air intake and a temperature-compensating engine control unit. This is an RX-7, not a Honda Civic or a lawn mower. Your local gas stations will switch to a winter blend if your local government deems it necessary for your region. Rather than engine or fuel mods, what you need is a good set of winter or all-season tires, depending on the severity of the weather in your area.