2" at 8mph has to hurt something.

 

One more reason the Cummins is stronger:



dmax on far left:

 

Wish there was an up-to-date picture

 

They are both pretty accurate actually... The first is newer. The second is old and shows the 7.3 Ford but nothing has changed in the Cummins. The 6.7 rods may be a bit larger if anything.

The Duramax still has the smallest rods and is still 6.6L. Rod design may have changed a bit, internals really haven't changed much. Ford is now 6.7L, but the 6.4L and 6.0L rods were essentially the same.

 

Spent most of the day yesterday with the painter and interior guy going over what needs to be done. Going to drive down to San Diego tomorrow and drive trucks that have both motors. Really only way to decide.

The nice thing with the duramax is that it can be started the 27th and finished in 2 to 3 weeks. The cummins conversion can't be started until maybe late October, and would take a month due to the complexness of putting it in.

Will report back late tomorrow, they have some badass trucks there, so I'll take some pics.

 

I would wait for the Cummins. I have driven both types of trucks, from mild to wild, and would choose the Cummins over the Duramax if I had to transplant one into a hummer.

 

As of recently the cummins has been the front runner. But I would really like to get the ball rolling.

 

+1.

I prefer the Cummins to the Duramax any day of the week. The Powerstroke is my favorite but the Cummins is the most rock solid and versatile light duty diesel on the planet, no matter what your budget.

I also prefer engines designed and produced here. The Duramax is not a GM engine, it is an Isuzu engine. Wonderful for what it is, just not my flavor.
Just my opinion that it would be worth the wait. I would not rush just to have it sooner. However, you will be infinitely better off and happy either way. Good luck, look forward to the pics!

 

THe new 6.7 has caught my attention. The 6.4 and 6.0 are, not Ford's best effort and a total fail following the 7.3. I have a good buddy with a 6.0 and he has chased about every gremlin from the engine, we had to get a head, purchased new from Ford. Put a piece of flat stock on it to check the deck, warped, not from one end to the other but waves in the head. Not something you want when it is being installed on a F2 ProCharged 88mm compound boost setup.

 

6.0 and 6.4 are fine as long as you know how to handle them. My 6.0 was actually bullet proof, only issue was the f*ckn EGR. Other than that I changed the oil and filled it up. Once I took that off, it was even better. If you remove the EGR and put headstuds on a 6.0, you likely won't be able to break it without throwing shit tons of spray and enough fuel to burn down a city at it. Rods generally stay in the block until 750whp. The shop where my 7.3 is has build a number of successful 6.0s and one of the first twin K16 6.4 pullers.

That said, for all out power, a V or P pump mechanical 7.3 is the only thing can run with a mechanical Cummins. The 6.0/6.4 and Duramax don't have what it takes. Ironic that the 2V/cyl motors are the real runners.

If you don't fully understand the state of the engine (what garbage needs to come off) and you start throwing shit at it, it's destined to fail. Was it modified and did it have an EGR on it when he had issues? The warped heads are a known issue... They reman them and that's part of the problem

Never understood prochargers. Most people way undersize them for the application. Never understood why people were wasting the time/money when you can throw on compounds with better results.