can someone explain why they are called modular engines now?

 

over head cam is a modular design engine. compared to the pushrod(old technology) that GM still primarly uses

 

grantcool - I believe Ford refers to them as Modular because many of the parts are interchangeable between the 4.6 and 5.4 engines.

modular link

 

That was a good read: "The idea was that the basic dimensions could be used to build many different engines and power many different vehicles."

 

ummm, the way i think of it is the cyl and the heads are seperated from the engine block, where you can bolt up bigger cyl and heads to the same block. Remember back in the early 70's? Yamaha made a 125 and a 175 Enduro Bike, it was the same engine, except the 175 had a bigger cyl and head. If they made Amsoil 2 stroke oil back then, these bikes would still be running today.

 

The 4.6 & 5.4 use the same 2V cylinder heads and cams. The only differences are Windors vs. Romeos and PIs vs. Non-PIs.