Here come the Mongoose (8.3L Duramax)

Flintlock · 2026-09-24T12:38:33-0500

I’m happy with my tremor. As far as corrosion goes, until Chevy does something about their wax coated frames i will not own one. here in the northeast, they look awful after 1/2 a winter

Velvet Elvis · 2026-09-24T12:47:42-0500

Mongoose.

Supergay.

Should have named it the "Bear".

AZsurveyor · 2026-09-24T13:04:06-0500

Honestly, I think GM is about five years late to the bigger displacement game. What we all want is reliability, fewer unnecessary parts on these engines, and proven longevity. These engines are already delivering impressive numbers, and many of us aren’t even using their full potential, so it’s safe to say most we don’t really care anymore. At the end of the day, It’s just a numbers game, as I think everyone has admitted to understand. It's a gang war. Only those in the "click" really care about it, the rest of the world goes about it truly unnoticed. Sad to say, going from 6.6 to 8.3 to catch up to a 6.7? That didn’t go too well, did it?

Plus, isn't the 6.7 HO making those paper numbers at the wheels? I know I have seen some dyno'd and they sure come pretty close to those paper numbers -- at the wheels!

I still have my soon-to-be 20-year-old SD 6.0L PS with 400K miles, and she’ll remain mine for as long as I live. A classic in my book.

I’ll also keep my current ’22MY 6.7L for as long as she runs. I built her and omitted a lot of factory challenges to ensure she lasts, she’s sitting at 100K miles.

Leave it to us to make these engines better—we’re not after bigger displacement or more power numbers, but rather who can go the longest with fewer issues. The big three need to truly understand that.

I sincerely hope Ford sticks with the proven 6.7 block; all it really needs are improved exhaust manifolds, a welded crank gear, less parts, and some good tuning. She’ll keep rolling for hundreds of thousands of miles.

Let’s be real, how can you claim an HD victory with an HD engine if it’s sitting in a car frame? Real trucks have solid front axles—still behind in my book, GM.

Velvet Elvis · 2026-09-24T13:26:15-0500

AZsurveyor said:
Honestly, I think GM is about five years late to the bigger displacement game. What we all want is reliability, fewer unnecessary parts on these engines, and proven longevity. These engines are already delivering impressive numbers, and many of us aren’t even using their full potential, so it’s safe to say most we don’t really care anymore. At the end of the day, It’s just a numbers game, as I think everyone has admitted to understand. It's a gang war. Only those in the "click" really care about it, the rest of the world goes about it truly unnoticed. Sad to say, going from 6.6 to 8.3 to catch up to a 6.7? That didn’t go too well, did it?

Plus, isn't the 6.7 HO making those paper numbers at the wheels? I know I have seen some dyno'd and they sure come pretty close to those paper numbers -- at the wheels!

I still have my soon-to-be 20-year-old SD 6.0L PS with 400K miles, and she’ll remain mine for as long as I live. A classic in my book.

I’ll also keep my current ’22MY 6.7L for as long as she runs. I built her and omitted a lot of factory challenges to ensure she lasts, she’s sitting at 100K miles.

Leave it to us to make these engines better—we’re not after bigger displacement or more power numbers, but rather who can go the longest with fewer issues. The big three need to truly understand that.

I sincerely hope Ford sticks with the proven 6.7 block; all it really needs are improved exhaust manifolds, a welded crank gear, less parts, and some good tuning. She’ll keep rolling for hundreds of thousands of miles.

Let’s be real, how can you claim an HD victory with an HD engine if it’s sitting in a car frame? Real trucks have solid front axles—still behind in my book, GM.

Amen.