05 Mustang GT Engine

Blue00GT · Mar 18, 2004

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.

Boomer v3.8 · Mar 19, 2004

Depends on how its tuned.

Omegalock · Mar 19, 2004

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.

BlackBeast2 · Mar 24, 2004

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 · Mar 24, 2004

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!!!

i4power · Mar 25, 2004

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.

RandyB · Mar 25, 2004

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.

Rootus · Mar 25, 2004

RandyB said:
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.

So what does it mean to be cammed for low end torque, when you have VVT...

RandyB · Mar 25, 2004

HairyCanary said:
So what does it mean to be cammed for low end torque, when you have VVT...

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.

GinoGT · Mar 26, 2004

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.

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.

USAF-Sergeant · Mar 26, 2004

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.

GinoGT · Mar 26, 2004

It's the same as it is now. The 4.6 and 5.4 already share lots of parts.

bigred0383 · Mar 26, 2004

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?

bigred0383 · Mar 26, 2004

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.

numenor27 · Mar 26, 2004

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.

KingDiamond · Mar 27, 2004

I drove a work van with a 5.4L Triton V8 in it and it picked up pretty good in first. I was surprised how fast it was. The old van with the 5.8 Windsor felt much slower for some reason.

Vlad · Mar 27, 2004

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

Rootus · Mar 27, 2004

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

bigred0383 · Mar 27, 2004

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).

ryanrule · Mar 27, 2004

well i know that they had to modify the bay to fit the 5.4 in the 00 cobra r

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