1971 Firebird Engines

1971 Firebird Engine Specifications

Engine ID Codes
 
UPC Type Source Displ (cid)
Bore & Stroke
Carb
Comp
HP/RPM
Torque/RPM
Manual 
Automatic
 
L22 Inline 6 Chevrolet 250
3.88 x 3.53
1bbl
8.5:1
155@4200
235@1600
ZB, CAA
ZG, CAB
standard Base
L30 V-8 Pontiac 350
3.88 x 3.75
2bbl
8.8:1
255@4600
355@2800

WR*, WU**

YU***, XR****
standard Esprit and Formula, optional Base
L65 V-8 Pontiac 400
4.12 x 3.75
2bbl
8.2:1
265@4400
400@2400
-
XX
optional Esprit
L78 V-8 Pontiac 400
4.12 x 3.75
4bbl
8.2:1
300@4800
400@3600
WT*,WK**
YS
optional Formula
L75 V-8 Pontiac 455
4.15 x 4.21
4bbl
8.2:1
325@4400
455@3200
-
YC
optional Formula
LS5 V-8 Pontiac 455 HO
4.15 x 4.21
4bbl
8.4:1
335@4800
480@3600

WL* , WC**

YE
standard Trans Am, optional Formula
*with 3 speed manual
**with 4 speed manual
*with Power Glide Automatic
*with Turbo Hydramatic
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