Join Date: May 2006
Location: Hoyt, Kansas
Bronco Info: 85 Bronco, 309ci I6 w/4bbl, np435, 4" lift, 37" Irok NDs, 4.56 w/ Detroit Locker and tru trac
I would think a proper compression ratio, cam, and tune, it could easily produce 550 hp NA, while being daily drivable. Consider the old 460. With just a few mods, they are capable of 600 hp. There isn't but 20 CI difference between em, and the 7.3 has 50 year better technology and design.
But who needs that kind of power for an every day workhorse. No one. 400+ hp with proper gearing will pull what most people need to. It's not a muscle car engine, and it's not an engine meant to be driven all day, everyday, like a tow truck, dump truck, or delivery truck. It's for guys who pull a boat or camper every other weekend. Or the guy pulling a skidsteer around town once a week.
One of our customers had a 78 F250 with a 400. It died on him a couple years ago. It had 468,000 miles on the original engine. It hauled construction materials and farm stuff around all the time. From pulling trailers of hay to pulling stumps; this truck worked for a living. That's the kind of person this engine was designed for. Now he has a superduty with another workhorse (albeit a diesel), the 7.3 PSD.
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