so if i were to switch my v-6 to another, which one should i use?? the 4.2 truck? ive seen it swaped a lot on v6power.com, i gues they like itcobra232 said:they are the same block but not the same engine. the 3.9 was developed for the freestar and ford carried it over to the stang.
3.80"X3.46" for the 3.9
3.81"X3.39" for the 3.8
bore and stroke.
the 3.9 should deliver better torque due the smaller bore and longer stroke but the difference would be small
it is a mistake for ford to go to the 4.0L engine in the stang. while a powerful engine it is stretched to the max and there is no room to increase displacement and the smallish block limits strength
the 4.0 is a decendant of the 2600 capri and 2800 pinto engine from the 70's known as the cologne engine from Cologne Germany. a V4 variant was made for Europe. these are not the strongest blocks and even though it has been converted to SOHC the heads still don't flow well. ford would have been better off using the 4.2 F-150 engine in the new stang until the 3.5L DOHC makes it's way into the stang
97v6Silver said:it's the same motor just got a lil more intake room...
Ghostalker said:and of course, a beautiful 5.0 L 300 stock horsepower for the GT model,
does anyone know if its a 'real' 5.0 this time and not a 4.9?
dastang2 said:are you sure that the 3.9 will be exactly alike except for the small crank change. i know the old 2.8's ford made in the bronco II's and rangers were very different than the 2.9's they started putting in them at around 86 or so.
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