4BT Cummins

[Ziegelsteinfaust]

My friend has been on me to do a Cummins Swap in my C10 since I wounded the motor doing donuts. I have been diesel curious for quite awhile, but never felt the need to pull the trigger. Yet I ocassionally look at swaps when I am bored at work. Since I work graveyard I have a bit of time.

So why do some people say the 4BT can not handle the same big power upgrades a 6BT can? Is this because it is not as balanced with the 4 cylinders vs 6?

Also some people in a 2wd truck claim low 30's highway, and other's say anything above mid 20's is lying? Any opinions on who is right?

One build that had me interested is a guy who used a 8hp75 with Eco-diesel torque converter combined with a proper rear gears. Said he should be at 1700rpm at 75 for maximum cruising plus have a wide ratio transmission to have a good mpg at any speed. I believe it was going into a lowered D100.

Any thoughts?

Just trying to learn from peoples experiences.