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
8
Cylinder Heads
– D347SR
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Ford Racing Aluminum - M-6049-Z304DA
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Service replacement head PN is M-6049-Z304D
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Fully machined combistion chamber
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Chamber Volume - 63cc (nominal)
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Intake Valve – 2.020" diameter. Total length – 5.340"
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Exhaust Valve – 1.600" diameter. Total length – 5.365"
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Both intake and exhaust valves are stainless steel with
swirl polished heads
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Valve seals on both intake and exhaust
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Rocker arm stud – ARP 334-7203
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Stamped guide plate – M-6566-Z304D
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NOTE: 0.110”- 0.130” flat washer is used under the
rocker arm stud in some production heads to achieve
the correct thread engagement
Cylinder Heads
– D347SR7
•
Ford Racing Aluminum - M-6049-Z304DA7
•
Service replacement head PN is M-6049-Z304D
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Same as M-6049-Z304DA except for the 7MM valves:
o
M-6507-D3047 Intake Valve
o
M-6505-D3047 Exhaust Valve
Valve Spring – D347SR – D347SR7 – S347JR
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Beehive valve spring – M-6513-BH – Identified by silver
finish for the COMP 26918 Spring and Brown for PAC
1218 Spring
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Approved optional spring – COMP 26918 w/ enhanced
surface finish
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Valve spring locator .060" thick – M-6536-BH
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Retainer – M-6514-BH
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Valve Locks – 10 degree - M-6518-BH (STEEL) (11/32”)
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Valve Locks – 10 degree - 13171-8 (STEEL) (7MM)
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Valve spring installed height - 1.750" – 1.800"
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Valve spring closed pressure - 130 lbs. @1.800"
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Valve spring open pressure - 313 lbs. @ 1.175"
