7.3 on the dyno stock (mostley), then hot rodded
Thread Starter
|
Laughing Gas
Joined: Aug 2018
Posts: 942
Likes: 149
7.3 on the dyno stock (mostley), then hot rodded
Tuned
Joined: Mar 2022
Posts: 304
Likes: 192
From: Northern California
Stock (mostly) hp/torque numbers were impressive out of the gate (15% higher than stock ratings). After modding, interesting their camshaft / header , etc. updates increased hp (18% from baseline) and moved/widened the torque curve, but effectively no increase in the torque number. Would be a fun motor in the swap application intended.
Its Comin Right for us!
Joined: Feb 2005
Posts: 12,189
Likes: 2,656
From: GA
Crazy the kind of gross horsepower the 7.3 makes in stock form while silky smooth and quiet, and stock exhaust manifolds. Heads and combustion chambers must have left little room for improvement.
Good comparison of what one of the best factory configured 460's did in gross hp, then what it takes to get a 460 to where the 7.3 went with some basic bolt-ons.
I do not think this is a "high compression" 10.5:1 460 as richard claims, looking at the pistons they look like later model dished pistons and its probably closer to 9-9.5:1 in reality which would explain being down from the 365 gross rating the factory gave.
Good comparison of what one of the best factory configured 460's did in gross hp, then what it takes to get a 460 to where the 7.3 went with some basic bolt-ons.
Trending Topics
Lead Driver
Joined: Feb 2005
Posts: 7,951
Likes: 2,658
From: The Great State of Texas
I don't see how that 460 could have been 10:1. I had a 1971 Chevelle SS 454 that had ~10:1 compression and that thing made 450 crazy HP.
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
Its Comin Right for us!
Joined: Feb 2005
Posts: 12,189
Likes: 2,656
From: GA
460 heads leave alot to be desired in the flow department without porting.
Being designed to fit in Lincoln really killed flow on exhaust side.
Even the CJ/SCJ and PI heads arent that much better.
Was yours the 11.25:1 LS6? That 454 in 70-71 was about peak, those motors had a pretty lumpy cam too, like 242 @.050? And their heads flowed much better than ford's.
Check out the flow numbers in the video. Ford's 460 heads only flows in the 120-130 range @.600 lift stock exhaust side. your doing good to get them to 180ish with mild port job.
Ford had a smaller cam even in their 429 CJ/SCJ. Hell even their boss 429 with good flowing heads the cam timing was the same as the CJ/SCJ
Things have come a long way
Being designed to fit in Lincoln really killed flow on exhaust side.
Even the CJ/SCJ and PI heads arent that much better.
Was yours the 11.25:1 LS6? That 454 in 70-71 was about peak, those motors had a pretty lumpy cam too, like 242 @.050? And their heads flowed much better than ford's.
Check out the flow numbers in the video. Ford's 460 heads only flows in the 120-130 range @.600 lift stock exhaust side. your doing good to get them to 180ish with mild port job.
Ford had a smaller cam even in their 429 CJ/SCJ. Hell even their boss 429 with good flowing heads the cam timing was the same as the CJ/SCJ
Lead Driver
Joined: Feb 2005
Posts: 7,951
Likes: 2,658
From: The Great State of Texas
460 heads leave alot to be desired in the flow department without porting.
Being designed to fit in Lincoln really killed flow on exhaust side.
Even the CJ/SCJ and PI heads arent that much better.
Was yours the 11.25:1 LS6? That 454 in 70-71 was about peak, those motors had a pretty lumpy cam too, like 242 @.050? And their heads flowed much better than ford's.
Check out the flow numbers in the video. Ford's 460 heads only flows in the 120-130 range @.600 lift stock exhaust side. your doing good to get them to 180ish with mild port job.
Ford had a smaller cam even in their 429 CJ/SCJ. Hell even their boss 429 with good flowing heads the cam timing was the same as the CJ/SCJ
Things have come a long way
Being designed to fit in Lincoln really killed flow on exhaust side.
Even the CJ/SCJ and PI heads arent that much better.
Was yours the 11.25:1 LS6? That 454 in 70-71 was about peak, those motors had a pretty lumpy cam too, like 242 @.050? And their heads flowed much better than ford's.
Check out the flow numbers in the video. Ford's 460 heads only flows in the 120-130 range @.600 lift stock exhaust side. your doing good to get them to 180ish with mild port job.
Ford had a smaller cam even in their 429 CJ/SCJ. Hell even their boss 429 with good flowing heads the cam timing was the same as the CJ/SCJ
Things have come a long way
Cross-Country
Joined: Sep 2024
Posts: 95
Likes: 19
Having bought an '03 V10 Excursion recently, I know something about the gallons per mile. But I wonder what this Godzilla 7.3 would get in an Excursion swap? Same with that modified 600hp version?
Is the Godzilla with a new wiring harness and trans a viable option for the EX?
Is the Godzilla with a new wiring harness and trans a viable option for the EX?
Logistics Pro
Joined: May 2022
Posts: 4,285
Likes: 2,416
From: Everywhere and nowhere
Having bought an '03 V10 Excursion recently, I know something about the gallons per mile. But I wonder what this Godzilla 7.3 would get in an Excursion swap? Same with that modified 600hp version?
Is the Godzilla with a new wiring harness and trans a viable option for the EX?
Is the Godzilla with a new wiring harness and trans a viable option for the EX?