Mr Jones 4.6
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Someone may have already posted on this but I just read about these in the new Ford Racing Catalog...
4.6l 2v high-performance
CYLINDER HEAD
M-6049-D46 Complete 1996-98 Only
Add approximately 35 hp over production 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
51cc combustion chamber
Uses spark plug AGSF-32C
4.6l 2v high-performance
CYLINDER HEAD
M-6049-D46 Complete 1996-98 Only
Add approximately 35 hp over production 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
51cc combustion chamber
Uses spark plug AGSF-32C
