2V vs. 3V
Thread Starter
|
Senior User
Joined: Jun 2002
Posts: 114
Likes: 0
2V vs. 3V
As I read the specs on the '04 F150 3V Alum Head 5.4l and the '04 Expy 2V Cast Head 5.4l, I see the HP and TQ difference as follows:
3V - 300HP@5000 and 365TQ@3750
2V - 260HP@4500 and 350TQ@2500
Cocnerns:
1. Is additional 40HP really that much at the cost of higher revs and much closer to redline.
2. 15FtLbs of TQ at higher rpm seems like little gain.
Am I missing something?
Maybe if the TQ drops off quickly in the 2V and find yourself with no umpf....
Which numbers are more compatible to towing versus cruising?
Anyone have a link to the HP and TQ curves?
3V - 300HP@5000 and 365TQ@3750
2V - 260HP@4500 and 350TQ@2500
Cocnerns:
1. Is additional 40HP really that much at the cost of higher revs and much closer to redline.
2. 15FtLbs of TQ at higher rpm seems like little gain.
Am I missing something?
Maybe if the TQ drops off quickly in the 2V and find yourself with no umpf....
Which numbers are more compatible to towing versus cruising?
Anyone have a link to the HP and TQ curves?
Posting Guru
Joined: May 2002
Posts: 1,673
Likes: 0
From: Chicago Area
The primary advantage to the 3v heads is in breathing, so it wouldn't increase the torque much, but it does allow the engine to maintain torque to a higher RPM. As you may know, an engine will develop more horsepower just by increasing RPM's IF it can maintain its torque output (or even if the torque falls slower than the RPM's rise).
Because it has used the same or similar heads as the 4.6, the 5.4 (with almost 20% larger displacement) has been somewhat choked at high RPM's. That's why the GM engines have shown more horsepower.
I think you'll find the 3v heads are a big improvement.
Because it has used the same or similar heads as the 4.6, the 5.4 (with almost 20% larger displacement) has been somewhat choked at high RPM's. That's why the GM engines have shown more horsepower.
I think you'll find the 3v heads are a big improvement.
Thread Starter
|
Senior User
Joined: Jun 2002
Posts: 114
Likes: 0
Trending Topics
Posting Guru
Joined: May 2003
Posts: 1,211
Likes: 0
From: York, NE
I believe the 3v has more torque at all RPMs than the old 2v, and it hods it to a higher RPM to make for better passing on the freeway.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
Posting Guru
Joined: Sep 2002
Posts: 2,297
Likes: 0
All I know is that Ford better do something. I drove a 2004 Tahoe with a 5.3 recently. Definitely feels stronger than a 5.4 Expy, particularly since Ford porked-up the 2003+ models with an additional 300 lbs. over comparable 2002 models. I don't even want to compare the Tahoe to my 4.6
Posting Guru
Joined: Sep 2002
Posts: 2,297
Likes: 0
Originally Posted by CampingFamily
What was the final drive in the 5.3l Tahoe - PaulC
Logistics Pro
Joined: Oct 2000
Posts: 3,960
Likes: 5
From: All over Texas
Originally Posted by PaulC
Don't know. It was a Tahoe LT with the 5.3. I do know that it was the standard ratio, not an optional one. Tahoe's lighter than the Expy, which is a contributing factor in acceleration capabilities.
I still prefer my Expy for its rugged looks and durability.