Quote:
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Originally Posted by mike sweeney
Your engine is a 3.8L, The bore and stroke is the same as it has always been. I asked the Ford technicial rep that visits the dealership I work at and His answer was "because they redesigned the intake manifold". I asked him how an intake manifold increases engine displacement and he just laughed and couldnt answer why! So I asked If Ford could design a manifold for the 4.6L to bring i up to 5.0L!!  |
You sure?
3.9L ford = 3.80"X3.46" bore and stroke
3.8L ford =3.81"X3.39" bore and stroke
they are not the same engine but share the same basic engine family block (Essex block).
heads are the same but bore size is .010" smaller with the 3.9L than the 3.8L