
Ford Racing 347 Series Sealed Engine Handbook
Issue Date January 25, 2013 Revision #7
No part of this document may be reproduced without the prior agreement and written permission of Ford Racing
26
Revision 7 1/25/13
•
M-6007-D347SR7 engine added. This engine is the same as the M-6007-D347SR
engine with the following component changes:
o
Intake and Exhaust valves are changed to 7MM valve stem sizes
o
The pushrod cup in the lifter is replaced with a hardened steel cup
•
The 7MM valve titanium valve lock option is removed. Page 19
Ford Racing 347 Series Sealed Racing Engine Specifications vs. GMPP Crates
Ford Racing D347SR
GM "604"
Ford Racing S347JR
GM "603"
Key Attributes
Late Model
Late Model
ACT Spec
Limited Late Model
Displacement
347 cu in
350 cu in
347 cu in
350 cu in
Horsepower
415 @ 6000 rpm
400 @ 5500 rpm
350 @ 5500 rpm
355 @ 5250 rpm
Torque
400 @ 4900 rpm
400 @ 4200 rpm
400 @ 4000 rpm
405 @ 3500 rpm
Compression Ratio
10.1:1
9.6:1
10.0:1
10.0:1
Max RPM
6100
6200
6100
5800
Block
Block Classification
BOSS 302 Race 4-bolt
Production 4-bolt
BOSS 302 Race 4-bolt
Production 4-bolt
Intake Manifold
Mfg - type
Edelbrock Victor JR
GMPP Single Plane
Edelbrock Performer RPM
GMPP Dual Plane
Crankshaft
Material
SCAT Forged Steel
GM Forged Steel
SCAT Forged Steel
GM Nodular Iron
Connecting Rod
Material
SCAT Forged Steel
GM Powdered Metal
SCAT Forged Steel
GM Powdered Metal
Floating or press fit
floating w/ bronze bushing
Pressed
floating w/ bronze bushing
Pressed
Piston
Piston Mfg.
Mahle
GM
Mahle
GM
Piston material
Forged aluminum 4032
Cast
Forged aluminum 4032
Cast
Cylinder head
Head material
Aluminum
Aluminum
Aluminum
Aluminum
Head part number
Z304DA as cast
12464298
M-6049-X306
12556463
Chamber Volume
63cc
62cc
64cc (58cc Opt)
62cc
Intake valve Size
2.02"
2.00"
1.94"
1.94"
Exhaust valve size
1.60"
1.55"
1.54"
1.50"
Rocker Type - Ratio
Roller - 1.65
Roller - 1.5
Roller/1.6
Stamped Steel - 1.5
Camshaft
Duration @ .050 Intake
226
208
206
208
Duration @ .050 Exhaust
226
221
206
221
Valve lift intake
0.528
0.474
0.533
0.474
Valve lift exhaust
0.528
0.510
0.533
0.510
Lifter type
Hydraulic roller
Hydraulic roller
Hydraulic roller
Hydraulic roller
Ignition/Distributor
Distributor Type
MSD Electronic
None Included
MSD Electronic
None Included