Page 73 of 2008 Performance Parts by Ford Racing Performance Parts

cylinder heads high-performance cylinder head m-6049-d46 complete 1996-98 only add approximately 35 hp over production e.o #d-308-6 4.6l sohc heads this cylinder head assembly is considered to be the basic cornerstone for increased performance of the naturally aspirated engine the primary design goal for the head is to provide increased airflow capability resulting in significant horsepower gain specific design features include · bolt-on interchangeability with the production head all head faces cam cover intake manifold exhaust manifold and deck face are identical to production the head can be used with production or ford racing intake and exhaust manifolds and all other accessories in production position · larger inlet and exhaust valve size intake valve m-6507-d461 diameter has increased from 44.5 mm to 46.83 mm exhaust valve m-6505-d461 diameter has increased from 34.0 mm to 35.88 mm extensive flow development was done to optimize port contours to take advantage of these changes final test results show approximate airflow increases over production of 27 intake and 44 exhaust the above results are at maximum production valve lift 12 mm · intake valve centerline has been moved 2.0 mm closer to chamber centerline this has the effect of unshrouding the intake valve and making better use of the increased valve size · potential for high-lift camshafts larger valve springs and additional racing port work at customer discretion · excellent quality chamber and port finish 356-t6 aluminum casting · performance calibration recommended · 51 cc combustion chamber · uses spark plug agsf-32c note use of m-6067-d46 head changing kit recommended ford gt cylinder head assemblies m-6049-gt rh m-6099-gt lh · gt heads feature a reduced size lash adjuster allowing for a raised intake port creating a more direct intake path · these heads are the final revision of the 2000 cobra r heads · the most durable highest flowing modular engine cylinders heads available · same casting used on m-6007-r50 grand am cup race engine · fully loaded assembly · 37 mm intake valves 32 mm exhaust valves · intake valve lift 11.2 mm exhaust valve lift 11.5 mm · 42.5 to 45 cc combustion chambers 4.6l power improvement pi cylinder heads m-6049-p46 rh 2v m-6050-p46 lh 2v · current production 4.6l sohc 2v romeo engine aluminum cylinder heads · fully machined and assembled with production mustang gt valvetrain and camshaft · great for custom engine builds · less expensive than replacing valvetrain and remachining a used cylinder head · less expensive alternative to aftermarket performance heads · can be used on 1996-98 engines with additional modifications and parts · 43.9 ­ 1.5 cc combustion chamber · raises compression on 1996-98 engines to 10:1 engine components m-6049-p46 shown matt kenseth #17 nascar nextel cup series m-6050-p46 shown not legal for sale or use on pollution-controlled motor vehicles direct replacement part see pages 2-8 for important safety emissions and warranty information www.fordracingparts.com 71

[close]