There are so many posts on this thread that I don't know who said the following:
'HP goes up, duty cycle goes down'.
But it does make some sense to me. Case in point, the Ford 6 liter PSD. Without getting into yet another negative Ford 6 liter thread, I've wondered a few things about Ford's version of this, what I believe was an International engine design.
Didn't IH also use this engine in their medium duty trucks, but much detuned from the version Ford was using ?
Wasn't the IH version pretty reliable in it's less tuned, less HP version than the Ford 6 liter ?
The question I ask, is did Ford hop up the base IH engine, because Ford was involved in a diesel HP war with GM and Dodge ?
You know the old saying of..' for ever action there is an equal and opposite reaction.'
This is of course, Newton's third law of motion in physics.
As a result of the action of Ford souping up the IH engine...did the Ford 6 liter PSD...experience an equal and opposite reaction...in that the duty cycle went down...compared to the IH ?
Was there too much additional stress on the Ford version of the 6 liter PSD....through souping up...more so than what this engine was originally designed to handle ?
Furthermore to reinforce this point....was the Ford version of the IH engine...namely the Ford 6 liter PSD...duty cycle rated, by Ford, at around 250,000 miles...compared to the Dodge Cummins engine duty cycle, rated at 350,000 miles ?
In other words...'HP goes up, duty cycle goes down'.
I dunno. I'm not a Mechanical Engineer, just a curious regular guy who is for the most part so baffled by things mechanical, that I have trouble finding the hood latch on my son's Jeep. :B
