Hemi to be replaced by inline six?
This was announced a while back, but Stellantis has finally released details on the new twin-turbo 3.0 liter inline six that might replace the Hemi in the Ram 1500 and other Stellantis vehicles. Prett...
Forum Discussion
Turtle n Peeps wrote:mkirsch wrote:Turtle n Peeps wrote:
A lot of misinformation and misunderstanding in this thread. And I do mean a LOT. :B
Long strokes do NOT make more torque. That is a myth.
Because some dumpy old guy who makes a youtube video sez so?
No. Because engineers say so that's why.
If anybody want's to learn why, this is a great video to learn from. If you just want to know about torque, start at the 3 minute mark and learn about long and short stroke and what it "doesn't do to engines."
Don't like videos? Fine. Lets talk about actual diesel engines.
Engine #1. 2006 LBZ 6.6 Duramax. (Why this engine?) Because I own it and know about it.
Engine #2. 2006 Ram Cummins 5.9.
Engine #1 according to the internet the Durmax has a bore of 4.055 and a stroke of 3.90. (almost a square engine)
Engine #2 according to the internet the Cummins has a bore of 4.02 and a stroke of 4.72.
According to a lot of people on here the Cummins should kill my engine in torque because of the long rod.
Here are the dyno numbers:
2006 Duramax puts out 650 ft/lbs of torque.
2006 Cummins puts out 610 ft/lbs of torque.
So much for the long stroke putting out more torque.
I can hear the fan bois all ready saying that's not fair!! Your Dirty Max is a waaaaaay bigger engine!!! Fine, more facts:
2008 Duramax 6.6 L vs 2008 6.7 Cummins:
2008 Duramax 6.6 L = 650 ft/lbs of torque.
2008 Cummins 6.7 L = 650 ft/lbs of torque.
Well would you look at that? Same exact torque even though the Cummins has a waaaay longer stroke. :B
Engine Masters did a TV show a few months back about rod length. Everybody on the show (me too) thought the long rod engine was going to put out more torque. WRONG!! They were the same within dyno measurements. Link to Engine Masters rod article.
Your numbers are meaningly, because it is unknow how much power the manufacture of any given engine had tuned for! Cummins has traditionally tuned for longevity. Think million mile motors. How many Duramax's or Powerstrokes go a million miles?
