engine swap from 2.8 to 2.9
#2
I think they are the same. It would make sense for Ford to keep the same block and simply upgrade the heads. The only problem I can think of is if the bolt pattern for the 2.9 isn't the same as the 2.8's. Again this seems to be more trouble then it's worth for ford to change the tap pattern in the 2.8 block. Hopefully somebody else will know more.
#3
The 2.8L and 2.9L are different designs of the same family engine.
I do not know if the heads will even exchange, you could try putting the 2.9L intake manifold and top end on the 2.8L if it will line up with the intake ports on the head. The 2.8L has a pretty bad designed head though, so if you could drop the 2.9L heads on it would be even better.
Not sure though, never seen someone try it. Check the patterns on the head bolts and perhaps they will exchange, might screw with your compression ratio though.
I do not know if the heads will even exchange, you could try putting the 2.9L intake manifold and top end on the 2.8L if it will line up with the intake ports on the head. The 2.8L has a pretty bad designed head though, so if you could drop the 2.9L heads on it would be even better.
Not sure though, never seen someone try it. Check the patterns on the head bolts and perhaps they will exchange, might screw with your compression ratio though.
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