Unusual Tow Vehicle

IdaD wrote:


Do their tuning products do anything with the stock emissions equipment or is all of that still in play? I know you've voiced concerns with guys who delete or have discussed deleting in the past but there's no question doing so has some real benefits (I understand your concerns as well). I've yet to encounter a situation where I can't go whatever speed I want fully loaded through the Rockies, Sierras and etc and I'm fine with the way the transmission shifts so more power or screwing around with the transmission behavior seems sort of pointless. Just wondering if you have more insight on the benefits.

Sorry, I didn't see this due to all the hubbub.

From what data that I have seen and been told, they do utilize the SCR more that stock to remove NOx especially as the power levels increase. This is essentially what Cummins will be doing in their new EGR-Free diesels that also increase power and efficiency.

Without an SCR, and an EGR only, you are pretty much limited in the power you can put down because if combustion temps climb above 2,500F (which is the temp NOx is created) then the EGR valve will try and cool these temps down which will also hinder performance.

With the SCR system, you can remove NOx after the engine which allows you to crank up the output of the engine and just use more DEF instead of the EGR. The more power you put down, the more fuel you use, the more fuel you use, the more DEF you use. This is why these trucks will go through DEF quicker when towing or running the engine hard since you are utilizing more DEF for the power used. This is also why the manufacturers are able to crank up the power in the diesels in the past years, but at the expense of DEF usage when at full tilt.

The CPS tunes will make the truck more enjoyable to drive, because not only does it alter shift points to keep you at the perfect rpm at all times, but they also alter the torque converter lock up strategy which makes a huge difference since you are putting just about 100% of the engines power to the ground when locked up and less when not. The stock tuning has the TC not locking up at all until 4th gear making the truck feel sluggish on take off. Another thing that makes a huge difference is how the adjust the throttle pedal/ECM to be more responsive to input while getting rid of the dead pedal. It really is a night and day difference on how the truck will drive even on the low +20 hp tow tune which I am usually am in.