Just curious if anyone has replaced their 2v or 3v 5.4 with a 4v DOHC n/a or s/c engine like the Cobra Mustangs have? I have seen them available for 15K to 30K with low miles. And SVT has adapter harnesses available... Lots of money, but it sure would be fun!!!!
Anyone?
Thanks,
Garry in Kodiak, AK

 

The power curve on those wouldn't work worth a crap in a SD IMO. Even the original DOHC 5.4L's had a poor power curve and were only ever in the Navigators. A V10 with a Turbo or SC would be much better. Or just get a diesel and tuner and be done with it. Bet a mildly tuned PSD of any flavor would blow away any DOHC Mustang 4.6L in the same truck.

 

With a truck that is in the same zip code as 7000 pounds, you need low end torque to get things moving. The Cobra 5.4L engine is designed for a lighter car. Low end torque is sacrificed in favor if high end horsepower.

 

Thanks for the replies.

For background information, I own 3 superdutys at the moment...
2000 Excursion V-10 auto 4x4 118K miles
2002 F350 SRW CCSB 5.4 6spd man 4x4 40K miles
2005 Excursion 6.0 PSD 4x4 42K miles
and I owned previously:
2001 F350 DRW CCLB 7.3 PSD 6spd man 4x4 189K miles

They all have their strengths and weaknesses, and i am not bashing any one of them, as they have all served there purposes and me well.

What got me thinking is that my daily driver and hauler is my 2002 F350. The 5.4 and the 6spd are well matched. In the summer I haul a 10 ft 1966 Avion Camper on the back while running 34" tall 265x70x19.5 tires. When the camper is off, I run in the summer 35x12.5.16.5 BFG's. In the winter, my 7.5 ft Western Ultra-Mount snow-plow is hanging on the front, with 235x85x16 studded tires, and there have been times where both the camper and the plow have both been on the truck, due to camping, and then unexpected snow storms here in Alaska.
This summer we went to mainland Alaska, and drove around 1200 miles, and the 5.4 got between 11.5 and 12.5 average, with a low of 9 on a tank, and a high of 20mpg on a tank. Never had a problem with power on the hills, just drop down a gear, and wind-up the 5.4.
But a buddy of mine just bought a 2010 GT500 Cobra, and I got thinking, if my 2V 5.4 ever went south (not likely, since I only have 40,000 miles on it right now) could I or should I replace it with a 4V 5.4 or even a Supercharged 5.4? I think that especially with the ZF-6, it would be a blast to drive, and might even do better on mileage with the Camper on the truck.
As for the torque issue, re-gearing can solve that to a point. It's not like I'm looking to race the F350, but just to help make it a bit more responsive, and I would think that the motor mounts and bell housings are all the same between the Triton V-8's....

Anyway, I'm not bashing the V-10's or the Powerstrokes, but I have come to really like the little 5.4 and what it can do. It reminds me alot of my old 1965 Mustang with the 289 4bbl 4 spd. Loved to wind up quick, and was really fun to drive. That's the way I see my F350.

Thanks again, and please any more ideas are welcome!

Garry in Kodiak, AK

 

Shhh, you are going to let out our little secret that the 5.4 is the best motor for a superduty..

 

I think a supercharger on the 5.4L Triton engine would be awesome. A Paxton or Whipple style blower would be fairly easy to install, you could utilize the stock fuel system as long as you kept the boost to reasonable numbers (say 5 PSI) and 5 Star could write a tune for it that would make it a lot of fun.

 

Good point. I really like my 5.4 even though she could use some more umph. I got blown away by a modded duramax the other day, but I was impressed with my 5.4 as i was able to pull a few truck lengths before I did get my butt handed to me.

 

I took down a V-6 Chevy S-10 Blazer the other day. One road near home is two lane from the stop light for about 1/4 mile, then narrows to one lane, which just begs for a drag race!

Yes, it was just a V-6 but I figure I had at least 3500 pounds more weight. We were even off of the line and he stayed with me until the the truck hit 3rd gear, then I pulled away like he was standing still.

That felt good.

 

I can tell you first hand that...it's freaking awesome! I had the Roushcharger on my 2006 F-150 with a 5.4 3v. Layed rubber down without breaking a sweat. And mine was the non-intercooled version @ 6psi of boost. Intercooled added +45 HP/TQ
not so easily

the factory fuel pump isn't adequate really with OEM voltages. Up until Ford introduced the Flex Fuel motors, the fuel pumps were low flow units. Flex fuel capable vehicles have a high flow pump that can maintain proper pressures while boosting 6-8 psi. it'd be iffy for a 5 psi setup on a older truck IMO




you can however use a KB Boost a Pump. it increases the voltage to the fuel pump and allows for a higher flow rate. not bad, but not good for the pump

 

FWIW I helped a buddy of mine put a ProCharger on his 00 5.4 F250. It was not exactly what he was hoping for. At 6 psi it had nowhere near the power he was hoping for. He just wanted more towing power. Less than a year later he traded it off for a stock 7.3 (that is now tuned) and is much happier.

I drove his truck for a couple of weeks while having my BTS built and it just didn't have the same power as the diesel. Just my experience.

 

That's the result of putting a centrifugal blower on a low revving motor

Very rarely will you get the RPM`S that will put out the boost. At the rpm range the 5.4 runs, a centri blower is loafing along at 1-2 psi

 

That is why I replied to the comment about a Paxton. Anyone that tows with a 5.4 knows that you have to have the rpms up to get any business done. Even pushing 6 psi at high rpm, the thing was less than impressive. Cruising rpms weren't an issue. It was the fact that even on a downshift to get some pulling power it still had no guts.

My wife still thinks I'm going to blow up her Expedition when I pass someone and the rpms start climbing. I just tell her...it isn't a diesel honey.

 

Sure it can. There is a member running a blower on a V-10, running the stock fuel system (including injectors) with no issues. As long as you keep your boost levels sane (like 5 pounds) the stock pump and injectors will do an adequate job.

 

Just throw a 5.9l cummins in there and beff it up a little, then she'll fly!

 

If you're made of cubic money, go for it.

I'll keep mine all Ford for now.