- N -

Naturally Aspirated

An engine that uses atmospheric pressure to force the air into the cylinders.

Nb

Niobium An element with the atomic number of 41.

NC

An abbreviation for normally close, usually expressed nc. Sometimes used to indicate no connection.

NCC

Net carrying Capacity. The maximum weight of all personal belongings, occupants, food, fresh water, LP gas, tools, dealer installed accessories, etc. that can be carried by the RV. (Technically, the GVWR less the UVW equals the NCC.

NCT

Negative temperature thermistor.

NCVECS

The National Center for Vehicle Emissions Control and Safety at Colorado State University.

Nd

Neodymium An element with the atomic number of 60.

NDRA

An abbreviation for the Nostalgia Drag Racing Association.

NDS

Neutral drive switch.

NDT

An abbreviation for non-destructive test.

NDV

Nylon divert valve.

Ne

Neon An element with the atomic number of 10.

Near Side

The side of a vehicle closest to the curb.

Necking

A narrowing area of the exhaust pipe due to a buildup of exhaust by-products.

Necking Knob

A know attached to the steering wheel that permits rapid one-hand steering.

Needle And Seat

A metering assembly to admit fuel into the carburetor.

Needle Bearing

A bearing that contains needle-like rollers.

Needle Valve

The small, tapered male part of a needle and seat.

Negative

1. One of the two poles of a magnet. 2. One of the two poles of a battery, representing ground. 3. Any point which has an excess of electrons, or a negative charge. 4. Less than zero a pressure below atmospheric;(vacuum).

Negative Back Pressure EGR

An exhaust gas recirculation system having a normally closed bleed hole which opens when bac pressure increases closing a diaphram valve allowing engine vacuum to raise the pintal valve.