6 Cylinder Engine Specifications; Horsepower And Torque - Pontiac Grand Prix Service Manual

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PONTIAC SERVICE MANUAL
6 CYLINDER ENGINE SPECIFICATIONS
Type.
............................................................................
In-Line 6, Overhead Cam
Bore and Stroke..
.............................................................................
-3% x 3l%
Displacement.
.................................................................................
-250 cu. in.
Taxable Horsepower..
...............................................................................
-36.0
6 CYLIN DER ENGINE SPECIFICATIONS-Continued
HORSEPOWER AND TORQUE
COMPRESSION
ENGINE CARBURETOR RATIO HORSEPOWER TORQUE
250 1-Bbl. 9.0 175 @ 4800
240 @ 2600
250 Q'Jet 10.5 230
@
5400 260 @ 3600
Compression Pressure at Cranking Speed:
1 Bbl..
.................................................................
,150-170 PSI
@
155-165 RPM
Q'Jet
..................................................................
185-205 PSI @ 155-165 RPM
Firing Order.
.................................................................................
-1-5-3-6-2-4
Engine Number Location..
......................................................
.Pad Behind Oil Filler Neck
Cylinder Nos.-Front to Rear.
..................................................................
.I-2-3-4-5-6
Cylinder Block
Material.
............................................................................
.Alloy Cast Iron
Installation Angle.
..............................................................................
.4'19'
Cylinder Head
Material.
............................................................................
.Alloy Cast Iron
Combustion Chamber.
.....................................................
.Wedge Type-Fully Machined
Pistons
Material.
..................................................................
.Tin-plated Aluminum Alloy
Type..
.............................................
;.
..........
.Cam and Contour Ground-Slipper Skirt
Measurement Taken At.
..................................................................
.Top of Skirt
Clearance in Cylinder.
....................................................................
.0022"-.0028"
Piston Rings
Compression Rings.
..............................
.Two Cast Iron, Reverse Twist, Barrel Face Moly Channel
Material-Upper.
.................................................................
.Channel Moiy Filler
-Lower..
......................................................................
Lubrite Finish
Oil Ring.
.................................................................................
Three-Piece
Material-Rails (2).
...........................................................
.Chrome Plated Steel
-Expander.
................................................................
.Stainless Steel
Ring Gap
Compression.
...............................................................................
-01 5"
Oil.
........................................................................................
,035"
Side Clearance (Ring to Groove).
............................................................
.0015"-.005"
Piston Pin
Material.
....................................................................
.Extruded SAE 501 5 Steel
Diameter.
.....................................................................................
-9272'
Wall Thickness.
..................................................................................
.37"
Length.
.......................................................................................
- 3 . W
Fit in Piston..
............................................................................
.0003"-.005"
Fit in Rod.
....................................................................................
.Press
Connecting Rod
Material..
.....................................................................
.SAE 1037 or 1038 Steel
Weight (oz.).
...................................................................................
-20.5
Length (Center to Center).
.......................................................................
-5.70'