F-250 vs f-150 6.2 engine??
09-07-2015, 12:14 AM
#1
Senior Member
Thread Starter
F-250 vs f-150 6.2 engine??
Does anyone have any info as to what was changed in the f-250 6.2 engine vs the f-150 engine? I noticed that they rate the f-250 engine quite a bit lower in hp and tq. I have tried my hand with Google but cannot locate any specific info. Thinking possible cam change, maybe exhaust manifold difference, and maybe intake? Also curious if the oil pan is the same.
09-07-2015, 03:04 AM
#2
Senior Member
F-250 vs f-150 6.2 engine??
Does anyone have any info as to what was changed in the f-250 6.2 engine vs the f-150 engine? I noticed that they rate the f-250 engine quite a bit lower in hp and tq. I have tried my hand with Google but cannot locate any specific info. Thinking possible cam change, maybe exhaust manifold difference, and maybe intake? Also curious if the oil pan is the same.
Last edited by alpinestar1123; 09-07-2015 at 03:13 AM.
09-07-2015, 03:32 AM
#3
Senior Member
F-250 vs f-150 6.2 engine??
Some say it's just detuned for longevity and others say it's because the f250 and 350 can run e85 and some others say cams I'm not sure to be honest
09-07-2015, 06:26 AM
#5
Senior Member
It's detuned for noise. When the lead engineer did one of those "ask me anything" sessions 3-4 years ago he was asked that exact thing and his answer was "noise". There is a spec for F250 and beyond that have to do with noise while under load. It was a really great session that touched on reliability goals, design considerations, ...a little bit of googling and I'm sure you can find it.
The better tow ratings of the F250 come from the gearing, brakes, and chassis.
The better tow ratings of the F250 come from the gearing, brakes, and chassis.
The following users liked this post:
tuxedoblk_5.oh (11-03-2015)
09-07-2015, 08:42 AM
#6
Senior Member
Ah ha. The cams between the F150 and F250 version are different part numbers. An F150 6.2 carries AL3Z 6250 F or E depending on right or left. The F250 uses a BC3Z 6250 B or C depending on right or left. Not the same part number.
The exhaust manifolds are identical at BC3Z 9430 or 9431 D depending on right or left and the oil pan is also the same at AL3Z 6675 B. The intake manifold is also the same at AL3Z 9424 E.
Almost everything else carries identical numbers between the Super Duty version and the F150 version except for the camshafts in the long block. The only way something differs like valves or head assemblies as an example is if the Superduty is a compressed natural gas version. Otherwise if its a gas only engine the cylinder head assembly shares the same part number as the F150.
So the theory that the Super Duty has smaller intake lobes than the F150 accounting for the bulk of the power difference is the camshafts seems plausible. The tuning on the F150 version of the 6.2 is almost as equally as bad as the Super Duty.
As far as noise the F250 has a different resonator box ( the thing that says 6.2 mounted on the throttle body) as well as an intake tube with a resonance chamber on it versus the F150 having a straight tube from the filter lid to the resonator box. That would account for any noise reduction on the F250 engine.
The exhaust manifolds are identical at BC3Z 9430 or 9431 D depending on right or left and the oil pan is also the same at AL3Z 6675 B. The intake manifold is also the same at AL3Z 9424 E.
Almost everything else carries identical numbers between the Super Duty version and the F150 version except for the camshafts in the long block. The only way something differs like valves or head assemblies as an example is if the Superduty is a compressed natural gas version. Otherwise if its a gas only engine the cylinder head assembly shares the same part number as the F150.
So the theory that the Super Duty has smaller intake lobes than the F150 accounting for the bulk of the power difference is the camshafts seems plausible. The tuning on the F150 version of the 6.2 is almost as equally as bad as the Super Duty.
As far as noise the F250 has a different resonator box ( the thing that says 6.2 mounted on the throttle body) as well as an intake tube with a resonance chamber on it versus the F150 having a straight tube from the filter lid to the resonator box. That would account for any noise reduction on the F250 engine.
Last edited by 1994Vmax; 09-07-2015 at 10:34 AM.
09-07-2015, 12:01 PM
#7
Why would running e85 help the longevity of the vehicle? I heard running e85 can be more harsh on the engine? Maybe I'm wrong but I've never heard of it helping the Life of the Vehicle by running e85.
Trending Topics
09-07-2015, 01:13 PM
#8
He's not saying the e85 causes longevity but it make be for longevity or for running e85
09-07-2015, 02:47 PM
#9
Senior Member
Thread Starter
Ah ha. The cams between the F150 and F250 version are different part numbers. An F150 6.2 carries AL3Z 6250 F or E depending on right or left. The F250 uses a BC3Z 6250 B or C depending on right or left. Not the same part number.
The exhaust manifolds are identical at BC3Z 9430 or 9431 D depending on right or left and the oil pan is also the same at AL3Z 6675 B. The intake manifold is also the same at AL3Z 9424 E.
Almost everything else carries identical numbers between the Super Duty version and the F150 version except for the camshafts in the long block. The only way something differs like valves or head assemblies as an example is if the Superduty is a compressed natural gas version. Otherwise if its a gas only engine the cylinder head assembly shares the same part number as the F150.
So the theory that the Super Duty has smaller intake lobes than the F150 accounting for the bulk of the power difference is the camshafts seems plausible. The tuning on the F150 version of the 6.2 is almost as equally as bad as the Super Duty.
As far as noise the F250 has a different resonator box ( the thing that says 6.2 mounted on the throttle body) as well as an intake tube with a resonance chamber on it versus the F150 having a straight tube from the filter lid to the resonator box. That would account for any noise reduction on the F250 engine.
The exhaust manifolds are identical at BC3Z 9430 or 9431 D depending on right or left and the oil pan is also the same at AL3Z 6675 B. The intake manifold is also the same at AL3Z 9424 E.
Almost everything else carries identical numbers between the Super Duty version and the F150 version except for the camshafts in the long block. The only way something differs like valves or head assemblies as an example is if the Superduty is a compressed natural gas version. Otherwise if its a gas only engine the cylinder head assembly shares the same part number as the F150.
So the theory that the Super Duty has smaller intake lobes than the F150 accounting for the bulk of the power difference is the camshafts seems plausible. The tuning on the F150 version of the 6.2 is almost as equally as bad as the Super Duty.
As far as noise the F250 has a different resonator box ( the thing that says 6.2 mounted on the throttle body) as well as an intake tube with a resonance chamber on it versus the F150 having a straight tube from the filter lid to the resonator box. That would account for any noise reduction on the F250 engine.
I have been looking around and it seems the f150 engine is a bit more scarce as a used take out but the f250 engines are every where for under 3k with ~30k miles on it. They come with everything on them as a full take out engine. But looking at the numbers it seems the f250 engine is rated in the ball park as the 5.0 in terms of power. I'd hate to do all the work and it not give me what I want.
Yes I know the mileage will suffer, but the 5.0 I have now gets terrible mileage (best of 18 mpg cruising 60-65 mph on a 340 mile trip with minimal hills I average ~16 on my commute to work which consist of 70-75 mph straight highway) so from what I've been reading the 6.2 should get about what I'm getting now.
Just an idea I am pondering..
09-07-2015, 04:38 PM
#10
Senior Member
Yes I know the mileage will suffer, but the 5.0 I have now gets terrible mileage (best of 18 mpg cruising 60-65 mph on a 340 mile trip with minimal hills I average ~16 on my commute to work which consist of 70-75 mph straight highway) so from what I've been reading the 6.2 should get about what I'm getting now.
Just an idea I am pondering..
Just an idea I am pondering..
I don't know about that, my 6.2 has ratings of 12 city/ 13 mixed/ 16 highway. I can match those numbers but I have only beat the highway number once on a long trip i was able to muster 16.8 mpg. I don't think the MPG's are as close as you hope.
would still be a awesome swap!