They finally released the power figures on the new 7.3L gasoline engine - just slightly more powerful than the GM 6.6L. An interesting thing is that the new Power Stroke diesel is going to have forged steel pistons (not sure what the advantage is - maybe some engine builders can clarify for me).
Steel pistons can handle a lot higher peak cylinder pressure and temps. The latest designs keep the mass in check, with all the benefits of the higher grade material.
A lot of the towing guys on the RV forums didn't seem too impressed with the 7.3 power numbers. But power isn't everything.... the 7.3 was designed for mpg under load, and longevity/durability. It'll be interesting to see how those pan out.
One other aspect of a steel piston is that its heat transfer is less than aluminum and keeps heat in the chamber and not in the oil. That extra heat is a benefit for a Diesel. And the thermal expansion rates for steel would be less than many typical piston alloys, allowing or a tighter fit.
I had a chat with the chief engineer from a piston company and he oddly noted that the piston temperatures in a Detroit Diesel (2 stroke) were higher than the melting temperature of aluminum pistons.
One other aspect of a steel piston is that its heat transfer is less than aluminum and keeps heat in the chamber and not in the oil. That extra heat is a benefit for a Diesel. And the thermal expansion rates for steel would be less than many typical piston alloys, allowing or a tighter fit.
I had a chat with the chief engineer from a piston company and he oddly noted that the piston temperatures in a Detroit Diesel (2 stroke) were higher than the melting temperature of aluminum pistons.
I do know. My buddy has a large truck shop. He is praying FORD keeps building the POWER STROKE. If they stop building the STROKER he will have to lay off some people.:laugh:
How about , " LIFTING " the cab OFF to change the exhaust pipe that goes down directly dead center on the back of the engine and over the bellhousing.:surprise:
..............................................................................................................
My friends please remember
...............................................................................................................
SPEED KILLS............. DRIVE A FORD
YOU WILL LIVE FOREVER
...............................................................................................................
Bob:thumbsup:
Remember the Power Stroke is the new term. The Original Diesel in a Ford pick/up was a........... ??? The International Diesel, That was a Gem!...:crying:
Bob
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Related Threads
?
?
?
?
?
Team Chevelle
5.1M posts
115.6K members
Since 1998
A forum community dedicated to Chevrolet Chevelle owners and enthusiasts. Come join the discussion about restorations, builds, performance, modifications, classifieds, troubleshooting, maintenance, and more!