BoostedNV4500
New member
The legendary 6.6L LMM Duramax is a torque monster, but everyone seems to have a different opinion on where the "safe zone" ends. Some guys swear that 500–530 rwhp is the absolute dynamic limit before you risk throwing a rod or cracking a piston. Others claim they've been running hot tunes at 600+ hp for years with zero issues on a completely stock bottom end.
If you're planning a build with a bigger turbo, a built transmission, and aggressive tuning, where do you draw the line for daily driving and heavy towing?
What’s your real-world experience? Have you pushed your LMM past the 500-horsepower mark on stock internals, or did it end in a catastrophic teardown?
If you're planning a build with a bigger turbo, a built transmission, and aggressive tuning, where do you draw the line for daily driving and heavy towing?
What’s your real-world experience? Have you pushed your LMM past the 500-horsepower mark on stock internals, or did it end in a catastrophic teardown?
