The real HP/TQ numbers this is going to hurt!

Redwoodcamper wrote:
Give them all EFI live and 250k miles and report back. That's a test we all want to see.

This is why I didn't care about stock power numbers when making my decision. I knew that I was going to tuning my truck no matter what I was getting. A few clicks of my CSP4 switch and I can go from 390 rwhp(level 1) to 513 rwhp(level 4) if I choose to, but I hardly never go past my 450 rwhp(level 2) tune. There is no need to and the truck has pulled my 14k trailer up any grade I have taken it on without falling under the rated speed limit.

I know there is plenty left to be had in a mechanically stock 6.7L Cummins than the stock 370 hp/800 lb-ft. Without changing any hard parts, you can get up to about 513 rwhp/1,105 rwtq. To get above that, then the turbo would have to be replaced for a larger one and deletes. Fuel system is good to about 700 rwhp.

If I calculate for the usual 15% drivetrain loss, the 390 rwhp of my level one tow tune is about 449 hp at the crank which is right at what the current Duramax and Powerstroke had to change turbos or be redesigned to be at.