Engine swap/injector question
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Engine swap/injector question
Ok, so I'm at a loss.
88 Bronco, 5.0 AOD
I had to do an engine swap due to a poorly done transmission rebuild.
The donor came from a '95 f150
I know the firing order is different, fixed that.
My question to yous guys is:
Since the firing order is different from the 88 to the 95, Do I need to change the injector firing order(pattern) as well?
Runs great, but is a LOT pokey on the steep hills.
I used the original harness from the 88, I still have the engine harness for the 95.
What do you think?
88 Bronco, 5.0 AOD
I had to do an engine swap due to a poorly done transmission rebuild.
The donor came from a '95 f150
I know the firing order is different, fixed that.
My question to yous guys is:
Since the firing order is different from the 88 to the 95, Do I need to change the injector firing order(pattern) as well?
Runs great, but is a LOT pokey on the steep hills.
I used the original harness from the 88, I still have the engine harness for the 95.
What do you think?
You shouldn't. You can do some research to verify this, but your 88 should be speed density and have a "bank fire" injector system, which fires 4 injectors at a time, which will allow you to use either cam..
A little pokey on hills could be because the cam in the 88 was designed to produce more torque at low rpm's. Swapping the 88 cam into the newer engine will work but remember that the distributor drive gear has to be matched to the cam.
Flat tappet cams take a cast gear and roller cams take a machined gear.
88 would flat tappet, 95 would be roller.
A little pokey on hills could be because the cam in the 88 was designed to produce more torque at low rpm's. Swapping the 88 cam into the newer engine will work but remember that the distributor drive gear has to be matched to the cam.
Flat tappet cams take a cast gear and roller cams take a machined gear.
88 would flat tappet, 95 would be roller.
Thread Starter
Junior Member
Joined: Mar 2009
Posts: 6
Likes: 0
You shouldn't. You can do some research to verify this, but your 88 should be speed density and have a "bank fire" injector system, which fires 4 injectors at a time, which will allow you to use either cam..
A little pokey on hills could be because the cam in the 88 was designed to produce more torque at low rpm's. Swapping the 88 cam into the newer engine will work but remember that the distributor drive gear has to be matched to the cam.
Flat tappet cams take a cast gear and roller cams take a machined gear.
88 would flat tappet, 95 would be roller.
A little pokey on hills could be because the cam in the 88 was designed to produce more torque at low rpm's. Swapping the 88 cam into the newer engine will work but remember that the distributor drive gear has to be matched to the cam.
Flat tappet cams take a cast gear and roller cams take a machined gear.
88 would flat tappet, 95 would be roller.
When I bought the bronco, it had an oil pressure problem that was solved with an engine swap from a 88 Grand Marq - which happened to be a roller cam engine as well. So I used the G-M distributor with the correct gear in the new engine(s)
So that being said, I went to the federal-mogul site and found the specs on the cams and they are a little different from each other. It seems that the GM cam has a shorter duration than the 95 f150 cam does. And I don't know enough about lift and duration to know which way to go.
I do plan on rebuilding the 88 GM engine and putting it back in the bronco at a later time as I don't know the mileage on the 95 engine.
Had to read that twice to try to get it all straight.
Anyway, the 95 harness will not work with the 88 computer, so forget that.
The 2 motors are basically the same thing from the heads down. The heads on the 88 may have been different - the 95 will have E7TE heads which are ok, but nothing special.
The heads and cam on the 88 might possibly be something special which could account for the extra oomph. A lot of crown vics (and grand marquis) ended up with police interceptor (or Performance Improved) engines.
Hunt around a bit on the 88 heads (you need a mirror in the lifter galley if they're still bolted on) for a part number. If they're something different that might account for the difference in power.
Anyway, the 95 harness will not work with the 88 computer, so forget that.
The 2 motors are basically the same thing from the heads down. The heads on the 88 may have been different - the 95 will have E7TE heads which are ok, but nothing special.
The heads and cam on the 88 might possibly be something special which could account for the extra oomph. A lot of crown vics (and grand marquis) ended up with police interceptor (or Performance Improved) engines.
Hunt around a bit on the 88 heads (you need a mirror in the lifter galley if they're still bolted on) for a part number. If they're something different that might account for the difference in power.