KA-24-D-E (also ... SR20DET)
+ KA is the Series
+ 24 is the displacement ... 2.4L in this case
+ D is the valve train layout ... D = DOHC ... no letter = SOHC
+ E is the fuel delivery layout ... E = multiport fuel injection

VG33ER - the R designates a supercharger
SR20DET - the T designates a single turbo motor
VG30DETT - the TT designates a twin-turbo motor
Z24i - The i designates a throttle body fuel injected motor

Examples:

KA24E - SOHC 2.4L Fuel Injected
L28 - SOHC 2.8L Carbureted
SR16VE - Variable Valve Lift 1.6L Fuel Injected
MA09ERT - SOHC 0.9L Fuel Injected "Super" or Racing Turbo
SR18Di - DOHC 1.8L TBFI

Japanese Motors

SR20DETs

"Red-Top"
+ S13 Motor
+ 205 hp @ 6,000
+ 203 ft.lbs @ 4,000
+ T25 Turbo
+ Called a Red-Top because of its deep red valve cover

"Black Top (S13)"
+ 180SX Motor
+ 205 hp @ 6,000
+ 203 ft.lbs @ 4,000
+ T25 Turbo
+ Same thing as a Red-Top but newer and has a black valve cover

"Notch Top / S14 SR / Black Top"
+ S14 Motor
+ T28 Ball Bearing Turbo
+ 220 hp @ 6,000
+ 203 ft.lbs @ 4,800
+ Called a notch top b/c of the variable valve timing bulge on the valve cover, valve cover is also black

"S15 Motor"
+ S15 Motor
+ T28 Ball Bearing Turbo
+ 250 hp @ 6,000
+ 6-Speed Tranny

"GTi-R Motor"
+ Sunny GTi-R Motor
+ Garret T28
+ 227 hp
+ Individual Throttle Bodies
+ AWD layout... meaning its FWD when swapped.

CA18DET

"CA"
+ Original 180SX Motor, Base Model S13 Silvia Motor
+ 170 hp
+ T25 Turbo
+ "RB" Style Valve Cover ( very easy to distinguish a CA )

Many names of the S13/14/15s in the world
- 200SX (CA18DET / SR20DET)
- Silvia (CA18DET / SR20DET / SR20DE (Varietta))
- 240SX (KA24E / KA24DE)

Contributed by: Nismo_Freak