• 351C-4V closed wedge chamber (bolt-fulcrum rockers) Air is allowed into the secondary port only when the intake manifold runner controls (IMRCs) are open.

They have huge differences in flow and function. You really must make this modification to the pick-up.What makes these pumps different is capacity. It was not an easy transformation for Ford. Think of a torque converter like a water wheel in an old saw mill: the waterwheel is driven by fluid … In this chapter I cover the common engine swaps for first-generation Mustangs that increase performance potential. Your builder is the best judge of whether to internally or externally balance.I call it a timing system because it is more involved than a conventional overhead valve pushrod V-8 timing set. Piston noise has always been a Modular engine issue because of bore/piston dynamics. Others, such as Ralph Pici of PowerHeads, prefer the WAP and later DOHC blocks over the Teksid. Ford has eliminated final finish work on block contact surfaces.Regardless of whether you have a Romeo or Windsor block, the SOHC block is wonderfully rugged and capable. From 1991 to 1998, two 4.6L SOHC NPI head types are available: Romeo and Windsor. You want to look not only at the piston type and material, but the connecting rod ratio as well. The 5.4L crankshaft has a longer stroke. Instead of traditional iron or steel-billet machined camshafts, the Modular engine employs composite camshafts constructed of steel tubes and individual lobes that are pressed onto the tube in proper position. The 5.4L SOHC has never been fitted with DIS; instead, a coil-on-plug ignition was fitted. For a comprehensive guide on this entire subject you can visit this link:

Keep this in mind when you order cams and cam sprockets.

Romeo blocks have always been cast at Ford’s Cleveland foundry, which means they are cast with the “CF” Cleveland Foundry logo. Do not blindly select a piston based on hearsay or bench racing.Timing cover front dress varies among vehicle types. Romeo bolt holes are smaller. Today you can expect to see composite tensioners, which actually work better at controlling chain tension. Crossbolted main cap design makes the casting rugged and strong, plus it reduces noise, vibration, and harshness. Radius valve jobs are best left to drag racers. Romeo has consistently stayed with the six-hole crankshaft except for steel DOHC crankshafts, which are primarily eight-hole flange units. Sean Hyland recommends .0015-inch intakes and .0018-inch exhausts to control side motion, as well as bronze or steel guides and stainless steel valves. Romeo tends to be more passenger-car oriented while Windsor caters more to the truck segment, but there are exceptions to this rule.

All 5.4L cranks have eight-hole flanges. Smaller than usual valvesprings close conventional, smaller poppet valves. Bore size, 3.540 inches, tends to limit the 4.6L and 5.4L engines. On the left is the appropriate crank sprocket for the thicker early-style reluctor wheel; it does not have the offset. Four-bolt main caps plus a cross-bolted design provide solid support.The 1993–1998 Twin-Port B-Series DOHC cylinder head had 52-cc four-valve combustion chambers.

Heavier nodular iron crankshafts were built for heavier connecting rods, which first entered service in 1996. The smaller PI chamber size raises the compression significantly and makes it challenging to swap onto an NPI engine.

Your Header Sidebar area is currently empty. Note the absence of core plugs as you find with SOHC iron blocks. Factory tolerances are .002-inch intake valvestem-to-guide and .003-inch exhaust valvestem-to-guide. Never has this been more crucial than with Ford’s Modular V-8 because of the many variations produced since 1991. If you intend to lean on it hard and are anticipating supercharging or nitrous, select a forged piston along with a Manley H-beam connecting rod. With loose tolerances comes noise on start-up, but there’s nothing to worry about. Because balancers are relatively cheap, opt for a new one. This head can be installed on any Modular block as long as you complement it with a complete induction system, exhaust components, valvetrain, and cam covers.These D-shaped exhaust ports improve scavenging on the three-valve head. The Mustang’s water pump pulley has a lip to prevent belt derailment. Cross bolts secure jackscrews and main caps.Windsor blocks have dowel pinsecured main caps and cross bolts. Experts offer to carry out free diagnostics of your car, clearly define all malfunctions of work, however the named cost of repair of the motor can be overestimated or high. Larger lobes reduce internal friction and allow you to install a more aggressive profile cam. LEARN MORE ABOUT THIS BOOK … The FE Ford engine was released into production in 1958. This makes the Modular engine’s camshafts lighter and easier to manufacture. Windsor used plastic chain guides from the beginning in 1997, while Romeo was still using steel guides. Also keep in mind that Romeo has never produced a 5.4L SOHC or DOHC engine. This intake borrows from DOHC Cobra technology with a twin throttle body and longer intake runners.The design of oil filter/water neck attachments varies depending on vehicle type. However, be mindful of what makes them different and what needs to change on your engine before installation.There are two basic types of oil pumps for Modular engines. In actuality, it’s just not worth the money to port these heads and perform other modifications to get them to work well. For example, if it is 2000 f150, that it is compatible with 1998 to 2001 models. By the same token, Romeo has produced engines for trucks as well.


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