For a NA engine, what are the bare essential gauges needed for drifting and keeping your engine in check? I'm assuming that a water temperature gauge is a must, but not sure on what else I would need. Would anything other than a water temperature gauge such as an oil pressure/temperature gauge be optional/good to have but not needed for the engine to not overheat or become damaged?

water temp, oil pressure, voltage

voltage?

oil temp over voltage. if your alternator dies your car wont explode.

water temp, oil pressure, oil temp.

Joe wrote: if your alternator dies your car wont explode.

Debatable.

AZ89two4Tsx wrote:
Debatable.

explain to me how a gauge is going to prevent alternator explosion regardless?

I was kidding.