Generation 3 - 3.4L SHO "Super High Output" Specifications

From Taurus Car Club Maintenance and Modification Wiki

3.4L SHO

GENERAL SPECIFICATIONS Displacement · 3.4L (207 CID) Number of Cylinders · 8 Bore and Stroke · 82.4 x 79.5 (3.25 x 3.13 inch) Firing Order · 1-5-4-2-6-3-7-8 Oil Pressure (Hot 1500 RPM) · 138-310 kPa (20-45 psi)

CYLINDER HEAD AND VALVE TRAIN Combustion Chamber Volume · 39.4 ±0.7 cc (2.4 ± 0.04 inch)

Valve Seats · Width-Intake · 1.0-1.4 mm (0.039-0.055 inch)

· Width-Exhaust · 1.0-1.4 mm (0.039-0.055 inch)

· Angle · 45 degrees

· Width Limit · 1.5 mm (0.08 inch)

Valve Arrangements (Front-to-Rear)a · LH Intake · S-P-S-P-S-P-S-P

· LH Exhaust · E-E-E-E-E-E-E-E

· RH Intake · P-S-P-S-P-S-P-S

· RH Exhaust · E-E-E-E-E-E-E-E

Valve Stem to Guide Clearance · Intake · 0.025-0.058 mm (0.0010-0.0023 inch)

· Exhaust · 0.030-0.063 mm (0.0012-0.0025 inch)

Valve Head Diameter (Gauge) · Intake · 32 mm (1.26 inch)

· Exhaust · 27 mm (1.06 inch)

· Margin Thickness Limit · 0.5 mm (0.02 inch)

Valve Face Runout Limit · 0.05 mm (0.001 inch)

Valve Face Angle · 45.5 degrees

Valve Stem Diameter (Std) · Intake · 5.960-5.975 mm (0.2346-0.2352 inch)

· Exhaust · 5.955-5.970 mm (0.2344-0.2350 inch)

Valve Springs Maximum Compression Pressure (N @ Spec. Length) · Intake · 396.0 N @ 25.5 mm (89.0 lbs @ 1.0 inch)

· Exhaust · 396.0 N @ 25.5 mm (89.0 lbs @ 1.0 inch)

Free Length (Approximate) · Intake · 43.93 mm (1.73 inch)

· Exhaust · 43.93 mm (1.73 inch)

Installed Pressure (N @ Spec. Length) · Intake · 177.0 N @ 34.5 mm (39.8 lbs @ 1.36 inch)

· Exhaust · 177.0 N @ 34.5 mm (39.8 lbs @ 1.36 inch)

Service Limit · 10% Pressure Loss @ Specified Height

CAMSHAFT Lobe Lift · Intake · 8.2 mm (0.323 inch)

· Exhaust · 8.6 mm (0.335 inch)

Lobe Height · Intake · 43.96-44.16 mm (1.7307-1.7386 inch)

· Limit · 43.95 mm (1.7303 inch)

· Exhaust · 44.314-44.514 mm (1.7446-1.7526 inch)

· Limit · 44.304 mm (1.7443 inch)

End Play · Standard · 0.10-0.24 mm (0.0039-0.0094 inch)

Journal to Bearing Clearance · Front · 0.025-0.066 mm (0.0010-0.0026 inch)

· Others · 0.021-0.026 mm (0.0008-0.0024 inch)

Journal Diameter · Front · 30.459-30.475 mm (1.1992-1.1998 inch)

· Others · 24.959-24.975 mm (0.9826-0.9833 inch)

CYLINDER BLOCK Head Gasket Surface · a

Head Gasket Surface Finish · a

Main Bearing Bore Diameter · 68.000-68.019 mm (2.677-2.678 inch)

Cylinder Bore · Diameter · b

· Surface Finish (RMS) · 0.2-0.6 microns

· Out-of-Round Limit · 0.015 mm (.0005 inch)

· Out-of-Round Service Limit · 0.020 mm (.0007 inch)

· Taper Service Limit · 0.006 mm (.0002 inch)

CRANKSHAFT Main Bearing Journal Diameter · 62.976-63.000 mm (2.4794-2.4803 (inch)

· Out of Round Limit · 0.02 mm (0.0008 inch)

· Total Taper Limit · 0.02 mm (0.0008 inch)

· Journal Runout Limit · 0.06 mm (0.0024 inch)

Connecting Rod Journal Diameter · 49.976-50.000 mm (1.9675-1.9685 inch)

· Out of Round Limit · 0.02 mm (0.0008 inch)

· Total Taper Limit · 0.02 mm (0.0008 inch)

Crankshaft Free End Play · 0.061-0.261 mm (.0024-.0103 inch)

Connecting Rod Bearings · Clearance to Crankshaft—Desired · 0.023-0.059 mm (0.0009-0.0023 inch)

· Clearance to Crankshaft—Allowable · 0.08 mm (0.0031 inch)

· Bearing Wall Thickness (Std)c · 1.503 mm (.059 inch)

Main Bearings · Clearance to Crankshaft—Desired · 0.010-0.031 mm (0.0004-0.0012 inch)

· Clearance to Crankshaft—Allowable · 0.06 mm (0.0024 inch)

· Bearing Wall Thickness—Grade 1 · 2.491-2.495 mm (0.0981-0.0982 inch)

· Bearing Wall Thickness—Grade 2d · 2.494-2.498 mm (0.0982-0.0983 inch)

· Bearing Wall Thickness—Grade 3 · 2.497-2.501 mm (0.0983-0.0984 inch)

· Bearing Wall Thickness—Grade 4 · 2.500-2.504 mm (0.0984-0.0986 inch)

· Bearing Wall Thickness—Grade 5 · 2.503-2.507 mm (0.985-0.0987 inch)

· Bearing Wall Thickness—Grade 6 · 2.506-2.510 mm (0.0987-0.0988 inch)

· Thrust Bearing Thickness · 2.207-2.257 mm (0.0869-0.0889 inch)

CONNECTING ROD Piston Pin Bore Diameter · 21.017-21.031 mm (0.8274-0.8280 inch)

Crankshaft Bearing Bore Diameter · 53.015-53.035 mm (2.0872-2.0880 inch)

Length (Center to Center) · 138.06-138.14 mm (5.435-5.4386 inch)

Side Clearance (Assembled to Crank) · Standard · 0.15-0.30 mm (0.006-0.012 inch)

· Service Limit · 0.35 mm Max (0.0137 inch)

PISTONS Diameter d · Coded Grade 3 (Brown) · 82.390-82.400 mm (3.2437-3.2441 inch)

· Coded Grade 2 (None) · 82.380-82.390 mm (3.2433-3.2437 inch)

· Coded Grade 1 (Green) · 82.370-82.380 mm (3.2429-3.2433 inch)

Piston to Bore Clearance · 0.020-0.040 mm (0.0008-0.0016 inch)

· Service Limit · 0.070 mm Max (0.0028 inch)

Ring Groove Width · Compression (Top) · 1.23-1.25 mm (0.0484-0.0492 inch)

· Compression (Bottom) · 1.52-1.54 mm (0.0598-0.0606 inch)

· Oil Ring · 3.01-3.03 mm (0.1185-0.1193 inch)

Piston Pin · Length · 55.05-55.47 mm (2.167-2.184 inch)

· Diameter · 21.011-21.013 mm (0.8272-0.8273 inch)

Pin to Piston Clearance · -0.006 to +0.002 mm (-0.00024 to +0.00008 inch)

Pin to Rod Clearance · Standard · 0.004-0.020 mm (0.00016-0.00079 inch)

Side Clearance · Compression (Top) · 0.045-0.08 mm (0.0018-0.0031 inch)

· Compression (Bottom) · 0.03-0.07 mm (0.0012-0.0028 inch)

· Oil Ring · 0.06-0.15 mm (0.0024-0.0059 inch)

Piston Ring Gap · Compression (Top)—Gauge Diameter · 0.20-0.35 mm (0.0079-0.0138 inch)

· Compression (Bottom)—Gauge Diameter · 0.20-0.35 mm (0.0079-0.0138 inch)

· Oil Ring (Steel Rail)—Gauge Diameter · 0.20-0.70 mm (0.0079-0.0276 inch)

Ring Width · Compression (Top) · 1.17-1.185 mm (0.0481-0.0467 inch)

· Compression (Bottom) · 0.20-0.35 mm (0.0079-0.0138 inch)

LUBRICATION SYSTEM Oil Pump · Relief Valve Spring Tension (Force per Length) · 9.19 N per mm (52.5 Lb per In)

· Relief Valve to Bore Clearance · 0.052-0.088 mm (0.0020-0.0035 inch)

· Outer and Inner Rotor Tip Clearance · 0.06-0-0.24 mm (0.0024-0.0094 inch)

· Rotor to Housing Side Clearance · 0.03-0.09 mm (0.0012-0.0035 inch)

· Outer Rotor to Housing Radial Clearance · 0.10-0.175 mm (0.0039-0.0069 inch)

· Inner Rotor Shaft to Housing Clearance · 0.03-0.095 mm (0.0012-0.0037 inch)

Oil Capacity e · 6.35 Liters 6.7 Quarts

a P = Primary, S = Secondary, E = Exhaust b Cylinder Bore Diameter Grade 1: 82.4-82.410 mm (3.2441-3.2445 inch) Grade 2: 82.410-82.420 mm (3.2445-3.2449 inch) Grade 3: 82.420-82.430 mm (3.2449-3.2453 inch) c 0.250 mm Undersize—Add 0.125 mm to standard or grade 2 thickness. d Measured at perpendicular to, and 12.6 mm below piston pin hole center prior to coating. e With filter change.