1980 T25 - had engine replaced - what engine is this?

[ELVIS]

late T2(T4) Aircooled motor

[kevtherev]

CU 2,0l 4-cyl. Flat4 air-cooled 79 to 82 51Kw / 70bhp.

Capacity. 1970cc³
Number of cylinders/type. 4/overhead valve
Production run. 1979-1983
Output. 51kW - 70bhp DIN @ 4200RPM
Minimum octane rating. 91 RON
Ignition system. transistorized hall effect
Trigger location. distributor
Fuel system. Twin Solex carburettor
Type. 34 PDSIT
Description. carburettor - twin venturi

ignition coil supply voltage 11 volts
primary resistance .57 to .75 ohms
secondary resistance 2400 - 3500 ohms
firing order 1 - 4 - 3 - 2
distributor part number Bosch - 0 237 023 007
ignition timing 5°±1° ATDC with vacuum see note at bottom of page
Mech'l ignition advance checks 0°-1° @ 1150RPM w/o vacuum and basic timing
9°-13° @1600RPM w/o vacuum and basic timing
21°-25° @3400RPM w/o vacuum and basic timing
Vacuum check [+] - advance : [0] - Retard
Vacuum range - °engine [+] 9° to 12° : [0 ]11 to 13
Vacuum starts - mbar. [+ ]90° : [0 ]90°
Vacuum ends - mbar. [+] 240° : [0] 200°
idle speed 850±50 RPM see note at bottom of page
oil temp for CO test 60°C
CO content @ idle 0.±.3 % volume
HC content @ idle 500 parts per million

Spark plugs Bosch W8CC
electrode gap .6mm
valve clearance hydraulic
compression ratio 7.4:1
oil pressure 2 bar @ 2000RPM

Quoted from Brickyard information
http://www.brick-yard.co.uk/VehicleSpec ... CUdata.htm