Ford 7.3 gasohol engine 700HP! ?

I did get a chance to ride in a older Chev Avalanche 5.3? towing a camper trailer at weight police approved GCWR with a STS turbo kit on it. It pulled kinda like a 3.5 EcoBoost does - lots of low rpm torque vs downshift and 4000rpm every time it saw a hill coming.

The owner liked it best for towing in the prairie headwind aka The Endless Grade.

I think the first “mod” would be not ordering a 7.3 with salt flats rear ratio. No higher than 4.30 for a tow mobile.

5 overdrive ratios in a trans do not compensate for lower final drive ratios for towing, unless you have an engine that can produce sufficient torque at 1265rpm. Like a turbocharged ...

Speaking from actual experience of using a huffer on a big block gas engine (454/460/498 ci engines) for towing duties as in working trucks pulling heavy GN trailers never worked out. Engine heat was always a huge issue as more pressure was added to pull the next grade or fight a all day long 40 mpg head wind.
Maybe Whipple has addressed the heating issue and would be interesting to know how they handled that issue.

However the Whipple and the 7.3 gasser with 700 hp in a 8k lb truck would be a fun ride.

theoldwizard1 wrote:

noteven wrote:
Could a 7.3 EcoBoost turbocharger kit be far behind?

Why ? This is a TRUCK engine. Truckers (or the people who buy the trucks) want the "best bang for the buck" from initial purchase through maintenance with a long life.

Supercharging get instantaneous boost. Turbo, irregardless of how well it is done, still has some lag.

Direct injection does very little to improve power or fuel economy. The 5.0L "Coyote" engine now has 16 injectors, 8 direct, 8 port. Most of the time it operates on the 8 port injectors.

Unlike superchargers, turbos make more power in lower rpms while supercharged generally make it in higher rpm ranges. It is not just about how much, but when especially when it comes to towing. As far as turbo lag, it is only a major issue when you go wide open throttle and not when you are under load like in a towing application. So when it comes to towing in a truck, turbos are the best thing to have. When it comes to going fast at high rpms with a simple set up, superchargers are the way to go.

Direct injection also does a good deal to increase fuel economy because it allows the engine to operate at higher compression ratios without knocking. A direct injected gas engine can run up to 2:1 higher ratio than a port injected engine. Hence the reason why the direct injected 2018+ coyote has a higher compression ratio than the older port injected one. Higher compression ratios increase the efficiency of an engine. The port injection is only added to the coyote because of emissions. However, the problem is that direct injection and higher compression ratios also increase power and people tend to like to use the added power.

noteven wrote:
I think the aftermarket is being moved to emission legal equipment.

Not when comes to tuning which is required when you put forced induction on a naturally aspirated engine.

noteven wrote:
Could a 7.3 EcoBoost turbocharger kit be far behind?

Why ? This is a TRUCK engine. Truckers (or the people who buy the trucks) want the "best bang for the buck" from initial purchase through maintenance with a long life.

Supercharging get instantaneous boost. Turbo, irregardless of how well it is done, still has some lag.

Direct injection does very little to improve power or fuel economy. The 5.0L "Coyote" engine now has 16 injectors, 8 direct, 8 port. Most of the time it operates on the 8 port injectors.

I think the aftermarket is being moved to emission legal equipment.

Could a 7.3 EcoBoost turbocharger kit be far behind?

Lwiddis wrote:
Would the added diesel emissions bring the vehicle outside the limits?

They're talking about the new Gas 7.3 that just came out

Please everyone stfu about the emissions thing. There’s other threads you guys can nut punch each other in currently. No need to ruin another one.

Would the added diesel emissions bring the vehicle outside the limits?

Awesome! It did not take the aftermarket long to make aftermarket mods for this engine. I wonder how heavy you can tow with this thing. Either way, I bet it would be fun to drive.

On a side note, there is no difference between a gas owner adding this to their truck and a diesel owner deleting their truck other than the fact that you will be able to see some of the added emissions coming out of the diesel(depending on the tune), but you won't with the gasser.