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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 Operating and Tune Up Information – D347SR – S347JR - 347NST Recommended Timing 34° BTDC Total 4000 rpm Maximum RPM 6100 rpm Oil Pan 9 Quart plus filter/cooler w/ M-6675-D347SR Pan Oil Filter M-6731-FL1A Oil Pressure 60-70 psi @ 240° F/ 4000 rpm Recommended Oil 15w-50 Mobil 1 or 20w-50 Brad Penn Max Oil Temperature 280° F Coolant Temperature 195° F Thermostat Spark Plugs AGSP-32C Firing Order 1-3-7-2-6-5-4-8 Fuel Pressure (@ carburetor) 6-7 psi Engine Service Information and Specifications Standard Operating Specifications Main Bearing Clearance .0020" -.0025" Rod Bearing Clearance .0020" -.0025" Crankshaft End Float .005"- .007" Wrist Pin to Rod Clearance .0010"-.0012" Wrist Pin to Piston Clearance .0010"-.0012" Piston to Deck Distance .010" Below Deck Piston to Bore Clearance (follow Piston mfg. recommendations) Intake Valve to Guide Clearance .0014"-.0016" Exhaust Valve to Guide Clearance .0018"-.0022" Valve Lash Lash plus ¼ turn Pre-load 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 14

Ford Racing 347 Series Sealed Engine Handbook D347SR and 347NST Engine Rebuild Specifications Crankshaft weight 49.00 lbs - +/- 0.50 lbs Piston to Deck Distance .010" Below Deck - +/- .0050" Head gasket – minimum compressed thickness .038" (M-6051-CP331) Maximum bore size 4.040" (.010" overbore) Stroke 3.400" +/- .007" Valve spring installed height 1.750" – 1.800" - see note 1 below Valve spring pressure - seat 130 lbs @ 1.800" Valve Spring Pressure – Open 313 lbs @ 1.175" Valve Diameter - Intake 2.020" +/- 0.005" Valve Diameter - Exhaust 1.600" +/- 0.005" Combustion chamber volume 63.0 cc - +/- 2.0 cc Compression ratio 10.0:1 +/- 0.2 Camshaft installation – D347SR 0° position on crank gear Camshaft timing – D347SR 109° degree intake centerline +/- 1° Camshaft installation – 347NST 2° advanced position on crank gear Camshaft timing – D347NST 107° degree intake centerline +/- 1° Note 1 – valve spring installed height achieved by +0.050 valve locks or valve spring shims. S347JR Engine Rebuild Specifications Crankshaft weight 49.00 lbs - +/- 0.50 lbs Piston to Deck Distance .010" Below Deck - +/- .0050" Head gasket – minimum compressed thickness .038" (M-6051-CP331) Maximum bore size 4.040" (.010" overbore) Stroke 3.400" +/- .007" Valve spring installed pressure – seat/open 128 lbs +/- 6 lbs @ 1.80" 326 lbs +/- 16 lbs. @ 1.25" Optional M-65130BH Beehive Spring Valve spring installed height 1.800" - see note 1 below Valve spring pressure - seat 130 lbs @ 1.800" Valve Spring Pressure – Open 313 lbs @ 1.175" Valve Diameter - Intake 1.940" +/- 0.005" Valve Diameter - Exhaust 1.540" +/- 0.005" Combustion chamber volume – X306 Head 64.0 cc - +/- 2.0 cc Combustion chamber volume – X307 Head 58.0 cc - +/- 2.0 cc Compression ratio 10.0:1 +/- 0.2 Camshaft installation 0° position on crank gear Camshaft timing 106° degree intake centerline +/- 1° Note 1 – valve spring installed height achieved by +0.050 valve locks or valve spring shims 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 15

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