05 Mustang GT Engine

Blue00GT

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Aug 10, 2002
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Aurora IL
Did anyone else catch this in the Feb 04 issue of Motor Trend? The New 3V Mustang engine is said to share roughly 40% content with the latest 5.4 triton engine found in the new F150's. The Triton is using the same or similar 3V heads and charge motion control valves as the Mustang GT. There claiming 80% of max torque is available at just 1000rpm for the truck engine. IF this holds to be true for Mustangs 3V... it will make for one hell of ride.
 
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They usually setup trunk engines to run most of it's torque way down low and not as much torque on the top end due to the brute strength one needs to get off the line towing stuff but yeah it'll likely have a lot of low end grunt.
 
Here is my concern: Have they done anything to beef up the 'glass-jaw' bottom end ? Or has Ford once again added more power to the 4.6 without further strengthening the rods/pistons/bearings ? ('03 Cobra excluded)
 
GelatiCruiser said:
That's a good question BlackBeast.....but IF they don't tune the motor differently (which I'm assuming they will), then 80% of tq @ 1000 rpm's is SAAAWEEETT!!!

I'm assuming they tuned the Mustang 3V differently because the Mustang engine makes 300hp @ 6000rpm, which would mean that there will be less low-end torque than on the lower-revving Triton.
 
Keep in mind that the 5.4 has a lot more stroke than the 4.6, but with the same breathing capacity on top(same 3V heads). They are also cammed for low end torque. I expect the GT engine to have similar characteristics, just shifted up higher in the rpm band. I think if you didn't pop the hood on the new car, you would never know it wasn't a Mach 1 motor. That would be a good benchmark to shoot for anyways. :)
 
HairyCanary said:
So what does it mean to be cammed for low end torque, when you have VVT... :shrug:

Sure VCT helps it to behave more flexibly, but there is still a certain amount that is designed into the cam timing events. I heard VCT was for emissions benefits and efficiency as much as performance.
 
The Mustang is still going to be a 4.6. The F-150's 3V is the 5.4. So the 05 might not have all the low end that the F-150 does because of the shorter stroke. I would hope the 5.4 has that much torque with that 4"+ stroke. :puke:

The component sharing is going to be the same thing it is now, the new 4.6 and 5.4 will use the same heads.
 
I realize that as far as production cost, and ultimately MSRP, that using alot to the 5.4 parts is a huge benefit. My question is what's the drawback? What are we possiably losing in the tradeoff? Just so questions that popped into mind. Still can't wait to get a new '06 Stang.
 
My biggest concern is this: I have been looking at the pictures, and I have been talking to some other people. As far as I know the new Mustang's frame is a heavily modified frame that the Lincoln LS rides on. The LS uses the 3.9 V8 (I believe) because the 4.6 V8 won't fit in the engine bay. And to me, and others, it seems the 4.6 is pretty crammed in the new Mustang. Is there a chance that the 5.4 won't fit? I was really hoping to see the new 5.4 3valve in this new mustang, and it would be really dissapointing if they couldn't make it happen (they did with the SN95). Are my concerns valid?
 
Oh, I almost forgot, GinoGT I am a HUGE Dave Chapelle fan. All the guys on my floor (college dorm) watch each new one every week. If you don't already have it, get his first season on DVD, it's great. Have a good one.
 
bigred0383 said:
My biggest concern is this: I have been looking at the pictures, and I have been talking to some other people. As far as I know the new Mustang's frame is a heavily modified frame that the Lincoln LS rides on. The LS uses the 3.9 V8 (I believe) because the 4.6 V8 won't fit in the engine bay. And to me, and others, it seems the 4.6 is pretty crammed in the new Mustang. Is there a chance that the 5.4 won't fit? I was really hoping to see the new 5.4 3valve in this new mustang, and it would be really dissapointing if they couldn't make it happen (they did with the SN95). Are my concerns valid?


I agree. I would hate if the "cobra" like model does not have more displacement.
 
bigred0383 said:
My biggest concern is this: I have been looking at the pictures, and I have been talking to some other people. As far as I know the new Mustang's frame is a heavily modified frame that the Lincoln LS rides on. The LS uses the 3.9 V8 (I believe) because the 4.6 V8 won't fit in the engine bay. And to me, and others, it seems the 4.6 is pretty crammed in the new Mustang. Is there a chance that the 5.4 won't fit? I was really hoping to see the new 5.4 3valve in this new mustang, and it would be really dissapointing if they couldn't make it happen (they did with the SN95). Are my concerns valid?

correct me if I am wrong but I think the 5.4 should be the same width as the 4.6, just a little taller to accommodate the stroke
 
Vlad said:
correct me if I am wrong but I think the 5.4 should be the same width as the 4.6, just a little taller to accommodate the stroke
Think it over for a second -- the 4.6L is a 90* V8, so for every X distance you increase the height of the deck, you are going to get roughly X/2 increase in both width and overall height of the engine (assuming all else being equal).

Dave
 
I was always under the impression the 4.6 the 5.4 and the 6.8 all used the same cylinder width, but the length is what varied (as Vlad said) and that is why they were the Modular family of engines. I was just curoius as to the possibilty of the Mustang's engine bay handling the bigger size (whether it be width, length, height).