compression ratio SUBARU IMPREZA WRX STI 2011 Owners Manual

Black plate (419,1)
北米Model "A1110BE-C" EDITED: 2010/ 12/ 17
& EngineEngine model
EJ253
(2.5 L, SOHC, non-turbo) EJ255
(2.5 L, DOHC, turbo, except STI) EJ257
(2.5 L, DOHC, turbo, STI)
Engine type Horizontally opposed, liquid cooled 4 cylinder, 4-stroke gasoline engine
Displacement cc (cu-in) 2,457 (150)
Bore 6Stroke in (mm) 3.9 63.1 (99.5 679.0)
Compression ratio 10.0 : 1 8.4 : 1 8.2 : 1
Firing order 1
–3 –2–4& Electrical systemBattery type and capacity (5HR)
MT 12V-48AH (55D23L)
AT 12V-52AH (65D23L)
Alternator Non-turbo models 12V-90A
Turbo models 12V-110A
Spark plugs Non-turbo models FR5AP-11 (NGK)
Turbo models SILFR6A (NGK)
AT: Automatic transmission
MT: Manual transmission Specifications
12-3
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