: Engine Swap Info

04-08-05, 11:47 AM
Does anyone know if the 4.6L Northstar will fit in an Aurora that had the 4.0: originally?

04-08-05, 12:08 PM
It's the same block, but the computer controls on the Aurora won't compensate for the extra fuel/air that the 4.6 needs.

04-08-05, 12:28 PM
well the whole reason I want to do this swap is for the extra horse the 4.6L has. I would also be getting MSD ignition with stand alone fuel management.

04-08-05, 12:39 PM
I'm not sure how the stock computers would like that, since the transmission is also computer controlled. But if you can do it, go for it!

04-08-05, 12:41 PM
Thanks. I know it may seem a little :cookoo: , but with enough time and money, anything can be done. :thumbsup:

04-08-05, 01:11 PM
Bbob should have more info but I would think it would work. You might need an adjustable pressure reg to get a little more fuel flow but that is only 15% more displacement than stock.