V8 Engine - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars

Sprint_250 · 03-20-2003, 21:48

Does anyone know if the EFI engine out of a 1991 Ford F150 is the same as the 5 litre EFI engines in Falcons?

Any help would be great...

anakha · 03-20-2003, 22:25

Are we talking about a 302 or 351?

Both motors use speed density (MAP) rather than mass air (MAF).
302 uses a different upper and lower intake manifold (much taller) and may run a different firing order to the 302HO/351.

351 engine uses a flat tappet cam.

Both type use a front sump configuration like our Falcons.

Can't tell you about the rest of the accesories.

Maybe someone else can stpe in and fill in some of the other detail.

Soxx · 03-21-2003, 00:09

The 5.0L engine is the same. All the other bits hanging off will likely be different, manifold, T/B, sensors, etc.
But the basic engine is the same 5.0L Windsor.

Rick.

Sprint_250 · 03-21-2003, 02:00

Thanks for that, does anyone think that it is worth trying to do it up, I though since you would change most components that it could be done very easily

Anyone have any ideas?

ebxr8240 · 03-21-2003, 02:18

The H.O uses the 351 fireing order.Can be converted to maf with aftermarket inlet[351] wireing harness and eec.. or using our inlets here if 5 Ltr..From approx 95 the 351 went to roller cam..
The H.O started around 88 {I think} in the Mustang when it went maf some earlier in Calif state..
Maybe issues with serpntine belt and reverse water pump direction with H.O motors. But nothing that can't be worked out!!
May not have valve reliefes in pistons either depending what axact year/ cam choice....

Not too sure but I think Holley uppers fit truck lower manifold. Trouble is they face towards the drivers side with Holley...

Sprint_250 · 03-21-2003, 15:34

I know that you can change to the serpentine belts and to do this you must replace the timing cover, water pump, and harmonic balancer. It has been done in the us many times and I know how to do it so I dont think that will be a problem...but... is it possible to change the upper and lower manifolds for aftermarket items like GT40s or Edelbrock and while doing this change the to the MAF sensor?

Im just trying to work out if I want to do all this work on the engine, if it would be cost effective? I have been offered one for peanuts and was hoping it would be easy to modify.

ps. It is a 5 litre, does that make things easier?

WBT56 · 03-21-2003, 23:08

If it's a manual and you keep it manual you will have to change to a small diameter flywheel with the same balance specs.(if going into eb on)