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347 Series Sealed Racing Engine - Ford Racing Parts

347 Series Sealed Racing Engine - Ford Racing Parts

Ford

Ford Racing 347 Series Sealed Engine Handbook Cylinder Heads – D347SR – 347NST • Ford Racing Aluminum - M-6049-Z304DA • Fully machined combistion chamber • Chamber Volume - 63cc (nominal) • Intake Valve – 2.020" diameter. Total length – 5.340" • Exhaust Valve – 1.600" diameter. Total length – 5.365" • Both intake and exhaust valves are stainless steel with swirl polished heads • Valve seals on both intake and exhaust – PN M-6571-B221 • Rocker arm stud – ARP 334-7203 • Stamped guide plate – M-6566-Z304D Valve Spring – D347SR – 347NST – S347JR Option • Beehive valve spring – M-6513-BH – Identified by silver finish for the COMP Spring and Brown for PAC Spring • Approved optional spring – COMP 26918 w/ enhanced surface finish • Valve spring locator .060" thick – M-6536-BH • Retainer – M-6514-BH • Valve Locks – 10 degree - M-6518-BH • D347SR/NST Valve spring installed height - 1.750" – 1.800" • S347JR Valve spring installed height - 1.800" • Valve spring closed pressure - 130 lbs. @1.800" • Valve spring open pressure - 313 lbs. @ 1.175" Issue Date March 4, 2011 Revision #5 No part of this document may be reproduced without the prior agreement and written permission of Ford Racing 8

Ford Racing 347 Series Sealed Engine Handbook Cylinder Heads – S347JR • Ford Racing Aluminum - M-6049-X306 or • Ford Racing Aluminum - M-6049-X307 Optional • Cast combistion chamber • Chamber Volume – X306 64cc (nominal) • Chamber Volume – X307 58cc (nominal) • Intake Valve – 1.94" diameter. Total length – 5.078" • Exhaust Valve – 1.54" diameter. Total length – 5.078" • Both intake and exhaust valves are stainless steel with swirl polished heads with an undercut stem • Both iron and bronze valve guides are used in the production heads • Valve seals on both intake and exhaust • Uses self aligning roller rockers – 1.6:1 ratio Valve Spring – S347JR • Single valve spring – M-6513-A50 • 128 lbs. @ 1.800" installed height • Valve spring locator .060" thick • Steel Retainer – Crane Cams 99936 • Valve Locks – 7 degree - M-6518-B351 • Optional M-6513-BH Beehive Spring Added BH – Identified by silver finish for the COMP Spring and Brown for PAC Spring Issue Date March 4, 2011 Revision #5 No part of this document may be reproduced without the prior agreement and written permission of Ford Racing 9

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