Spotter's Guide
Hood Bird Guide
Color Guide
1971 Firebird Engines
Engine ID Stamping
UPC Code
Type
Source
Displacement (cubic Inches)
Bore & Stroke
Carb
Comp
HP/RPM
Torque/RPM
VIN
Manual
Automatic
Usage
L-22
Inline 6
Chevrolet
250
3.875 x 3.531
1 bbl
8.5:1
155@4200
235@1600
n/a
CAA
CAB
standard Base
L30
V-8
Pontiac
350
3.875 x 3.75
2 bbl
8.2:1
255@4600
355@2800
n/a
WR, WU, XR, YU
standard Esprit and Formula 350, optional Base
L65
V-8
Pontiac
400
4.125 x 3.75
2 bbl
8.2:1
265@4400
400@2400
n/a
-
XX
optional Esprit
L78
V-8
Pontiac
400
4.125 x 3.75
4 bbl
8.2:1
300@4800
400@3600
n/a
WK, WT, YS
standard Formula 400
L75
V-8
Pontiac
455
4.15 x 4.21
4 bbl
8.2:1
325@4400
455@3200
n/a
-
YZ
standard Formula 455
LS5
V-8
Pontiac
455 HO
4.15 x 4.21
4 bbl
8.4:1
335@4800
480@3600
n/a
WC (4spd), WL (3spd)
YE
optional Formula 455, standard Trans Am
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