2015 Dodge Challenger 6.4L HEMI SRT Engine Specifications

The 2015 Dodge Challenger 6.4 L V8 HEMI SRT engine specifications.

General Engine Description

This description is a precisely identifies the factory specifications for the 6.4L V8 SRT 392 cubic inch 2015-2016 Dodge Challenger HEMI engine.
DESCRIPTIONSPECIFICATION
Horsepower485 hp @ 6100 rpm
Torque475 lb-ft @ 4200 rpm
Engine Type90Ā° V-8 OHV
Displacement6.4 Liters 392 (Cubic Inches)
Bore103.9 mm (4.09 in.)
Stroke94.6 mm (3.72 in.)
Compression Ratio10.9:1
Firing Order1-8-4-3-6-5-7-2
LubricationPressure Feed - Full Flow Filtration
Cooling SystemLiquid Cooled - Forced Circulation
Cylinder BlockCast Iron
Cylinder HeadAluminum
CrankshaftForged Steel
CamshaftCast Iron
PistonsAluminum Alloy
Connecting RodsPowdered Metal

Cylinder Block Specifications

DESCRIPTIONMETRICStandard
Cam Bore 1 Diameter61.72 mm2.4300 in.
Cam Bore 2 Diameter57.86 mm2.2780 in.
Cam Bore 3 Diameter57.45 mm2.2618 in.
Cam Bore 4 Diameter57.06 mm2.2465 in.
Cam Bore 5 Diameter43.683 mm1.7198 in.
Cylinder Bore Diameter103.9 mm4.09 in.
Out of Round (MAX)0.008 mm0.0003 in.
Taper (MAX)0.0127 mm0.0005 in.
Lifter Bore Diameter21.45 - 21.425 mm0.8444 - 0.8435 in.

Piston Specifications

DESCRIPTIONMETRICSTANDARD
Clearance Measured at 38.0 mm (1.5 in.) Below Deck0.0245 - 0.0515 mm0.00096 - 0.0020 in.
Ring Groove Diameter
Groove #1
Groove #2
-
95.23 - 95.73 mm
93.53 - 94.03 mm
-
3.7492 - 3.7689 in.
3.6823 - 3.7020 in.
Weight450 grams15.87 oz.
Piston Length54.70 - 55.30 mm2.153 - 2.177 in.
Ring Groove Width
No. 1
No. 2
No. 3
-
1.24 mm
1.24 mm
2.04 mm
-
0.0488 in.
0.0488 in.
0.0803 in.

Piston Rings Specifications

DESCRIPTIONMETRICSTANDARD
Ring Gap
Top Compression Ring
Second Compression Ring
Oil Control (Steel Rails)
-
0.35 - 0.50 mm
0.35 - 0.60 mm
0.20 - 0.71 mm
-
0.0138 - 0.0197 in.
0.0137 - 0.0236 in.
0.0079 - 0.028 in.
Side Clearance
Top Compression Ring
Second Compression Ring
Oil Ring (Steel Ring)
-
0.02 - 0.068 mm
0.02 - 0.058 mm
0.019 - 0.229 mm
-
0.0007 - 0.0026 in.
0.0007 - 0.0022 in.
0.0007 - 0.0091 in.
Ring Width
Top Compression Ring
Second Compression Ring
Oil Ring (Steel Rails)
-
1.172 - 1.190 mm
1.472 - 1.490 mm
0.447 - 0.473 mm
-
0.0461 - 0.0469 in.
0.0579 - 0.0586 in.
0.0175 - 0.0186 in.

Connecting Rod Specifications

DESCRIPTIONMETRICSTANDARD
Side Clearance0.10 - 0.35 mm0.003 - 0.0137 in.

Crankshaft Specifications

DESCRIPTIONMETRICSTANDARD
Main Bearing Journal Diameter65 mm2.6 in.
Main Bearing Clearance0.013 - 0.041 mm0.0005 - 0.0016 in.
Out of Round (MAX)0.005 mm0.0002 in.
Taper (MAX)0.003 mm0.0001 in.
End Play0.052 - 0.282 mm0.002 - 0.011 in.
End Play (MAX)0.282 mm0.011 in.
Connecting Rod Journal Diameter54.00 mm2.126 in
Rod Bearing Clearance0.041 - 0.066 mm0.0016 - 0.0026 in.
Out of Round (MAX)0.005 mm0.0002 in.
Taper (MAX)0.003 mm0.0001 in.

Camshaft Specifications

DESCRIPTIONMETRICSTANDARD
Bearing Journal Diameter
No. 1
No. 2
No. 3
No. 4
No. 5
-
61.67 mm
57.79 mm
57.39 mm
56.99 mm
43.62 mm
-
2.4280 in.
2.2752 in.
2.2594 in.
2.2437 in.
1.7174 in.
Bearing To Journal Clearance Standard
No. 1
No. 2
No. 3
No. 4
No. 5
-
0.030 - 0.070 mm
0.050 -0.090 mm
0.040 - 0.080 mm
0.050 - 0.090 mm
0.040 - 0.080 mm
-
0.0012 - 0.0028 in.
0.0019 - 0.0035 in.
0.0015 - 0.003 in.
0.0019 - 0.0035 in.
0.0015 - 0.003 in.
Camshaft End Play.080 - 0.290 mm0.0031 - 0.0114 in.
Duration288.0Ā°288.0Ā°
Valve Lift (@ Zero Lash)
Intake
Exhaust
-
15.0 mm
14.2 mm
-
0.591 in.
0.559 in.

Valve Timing Specifications

DESCRIPTIONSPECIFICATION
Intake
Opens (BTDC)
Closes (ATDC)
Duration
-
36.0Ā°
250.0Ā°
286.0Ā°
Exhaust
Opens (BTDC)
Closes (ATDC)
-
278Ā°
10Ā°
Valve Overlap46Ā°

Cylinder Head Specifications

DESCRIPTIONMETRICSTANDARD
Valve Seat Angle44.5Ā° - 45.0Ā°44.5Ā° - 45.0Ā°
Valve Guide Runout (MAX)0.04 mm0.0016 in.
Valve Seat Width
Intake
Exhaust
-
0.94 - 1.04 mm
1.16 - 1.26 mm
-
0.037 - 0.041 in.
0.046 - 0.050 in.
Guide Bore Diameter
Intake
Exhaust
-
7.975 - 7.997 mm
7.975 - 7.990 mm
-
0.314 - 0.315 in.
0.314 - 0.315 in.

Hydraulic Tappets Specifications

DESCRIPTIONMETRICSTANDARD
Body Diameter21.387 - 21.405 mm0.8420 - 0.8427 in.
Clearance (To Bore)0.020 - 0.063 mm0.0007 - 0.0024 in.
Dry Lash (at the valve)3.0 mm0.1181 in.

Valves Specifications

DESCRIPTIONMETRICSTANDARD
Face Angle
Intake
Exhaust
-
45.5Ā° - 46.0Ā°
45.0Ā° - 45.5Ā°
-
45.5Ā° - 46.0Ā°
45.0Ā° - 45.5Ā°
Head Diameter
Intake
Exhaust
-
54.3 mm
42.0 mm
-
2.138
1.654
Length (Overall From Gage Line)
Intake
Exhaust
-
128.56 mm
127.17 mm
-
5.0614 in.
5.0067 in.
Stem Diameter
Intake
Exhaust
-
7.934 - 7.954 mm
7.930 - 7.950 mm
-
0.312 - 0.313 in.
0.312 - 0.313 in.
Stem - to - Guide Clearance
Intake
Exhaust
-
0.021 - 0.063 mm
0.025 - 0.067 mm
-
0.0008 - 0.0025 in.
0.0010 - 0.0026 in.

Valve Spring Specifications

DESCRIPTIONMETRICSTANDARD
Spring Force (Valve Closed)
Intake
Exhaust
-
510.0 N Ā± 26.0 N @ 52.1 mm
510.0 N Ā± 26.0 N @ 52.1 mm
-
114.7 lbs. Ā± 5.8 lbs. @ 2.051 in.
114.7 lbs. Ā± 5.8 lbs. @ 2.051 in.
Spring Force (Valve Open)
Intake
Exhaust
-
1500.0 N Ā± 70.0 N @ 37.6 mm
1500.0 N Ā± 70.0 N @ 37.6 mm
-
337.2 lbs. Ā± 15.7 lbs. @ 1.480 in.
337.2 lbs. Ā± 15.7 lbs. @ 1.480 in.
Free Length (approx.)
Intake
Exhaust
-
63.9 mm
63.9 mm
-
2.516 in.
2.516 in.
Number of Coils
Intake
Exhaust
-
8.55
8.55
-
8.55
8.55
Wire Diameter
Intake and Exhaust
-
5.65 X 4.51 mm
-
0.222 - 0.178 in.
Installed Height (Spring Seat to Bottom of Retainer)
Intake
Exhaust
-
52.1 mm
51.2 mm
-
2.051 in.
2.016 in.

Oil Pump Specifications

DESCRIPTIONMETRICSTANDARD
Clearance Over Rotors (MAX)0.095 mm0.0038 in.
Outer Rotor to Pump Body Clearance (MAX)0.235 mm0.009 in.
Tip Clearance Between Rotors (MAX)0.150 mm0.006 in.

Oil Pressure Specifications

*CAUTION: If oil pressure is zero at curb idle, DO NOT run engine.
SpecificationSpecification
At Curb Idle Speed (min.)*25 kPa (4 psi)
@ 3000 RPM170 - 758 kPa (25 - 110 psi)

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