P.S. just grossed 58000 kgs with a tridem today no sweat

I can't give ya a pic since my CAT is a 2006 and has a different plug. The plug will be near the top of the air compressor and will look like a temp sensor that is screwed into the head. As for resistor size I made my own and can't remember the size right off hand. The best rule of thumb is to try different sizes so you can match your driving style but no more than what gets rid of the turbo lag. Just remember what Paule posted though...Your soot amount in the oil WILL go up. Just to give you a idea. My normal boost harness will show about 9-10 psi on the boost guage. Now when I go to drag race or sled pull I have another that pretty much doubles that (15-16 psi). This second harness is way to aggresive for the road and would cause way to much soot in the oil.

My best advice is if youre gonna keep the truck for a while send the ECM out to get tuned. A few companies are springing up that can do this and if done right you should get the throttle response you want without the soot issue.

Originally Posted by txviking

ULSD will rob you of 10-15% of your fuel efficiency. It'll also damage injectors and fuel pumps.

ACERT engines are less efficient than pre-ACERT because the extra junk like EGR, not to mention the extra heat and thus more plumbing to cool the engine, also rob horsepower.

ULSD won't rob a motor of that much power. Also it won't hurt you injectors or fuel pump. It is a decent fuel, but not anywhere near the diesel of yester-years. A good additive will help compensate for the loose of lubricity and bring the cetane levels up a little.

The ACERT motors don't have EGR. The run a very misunderstood intake cycling that is very similar to the miller cycle. This miller cycle basically opens the intake valves earlier (during the exhuast stroke) which allows a little bit of exhuast gas into the intake then it will draw the gas back in as the intake stroke starts. From the factory the ACERT motor isn't a strong runner compared to a pre-ACERT, of course this is comparing apples to oranges though. With a proper plan of attack and the right parts a ACERT will run and pull like a raped ape.

Originally Posted by txviking

I guess the soot in the oil comes along with soot out the stacks?

I've been wondering about the feasibility of hooking something like this up with a switch to the the dashboard. That way, you could turn it on when you need the power, and turn it off when you don't.

Could also be helpful if you're subjected to a road-side emissions test. Flip the switch and the smoke goes away.

What do y'all think?

A switch in the dash is highly advisable. Since certain states are starting to do on the spot emissions testing (New jersey for one) this would be a great benifit. If I was planning on keeping my boost harness I would install the switch, but since I'm just gonna tune the ECM there is no need for it.

in jamaica we haul up 2 160,000lbs net we r mostley hilly and no portian of flats, when i got this truck i avg 3.83mpg since i wired up am at 3.92-95 , 450liters per 3trips now 400flat, 100 ohm fuel temp, i wanna go 150ohm and try