SRobertson

Weird phenomenon with 2004.5, with the cold weather my smoke has gone down and umpf (seat of the pant) has gone up... or so it feels.

I have my smarty set on 3, torque management turned up but when the weather was warm I would still get a healthy dose of smoke if I jumped on it or getting up to speed on the interstate say 1500-2300 rpm. It would always haze a bit and I tried SW 1 but still had smoke so might as well run it on SW3.

With the cold weather coming to Utah my smoke seems to go down and the umpf factor feels like it has gone up. I cover the rad, except for a 8" hole, in the winters but overall I am surprised I have less smoke. The air maybe more dense, but it is quite noticeable.

On my 12v powered Ramcharger I tweaked the AFC wheel so I can romp on it and it is light enough that it jumps, but it won't smoke, which is great, wish I had more control in the 04.5.

I am around 4500-4700 feet and wish I could get this truck to run a bit cleaner. I run the stock cat and hopefully Santa (my wonderful wife, much better physique) will have a set of gauges so i can judge what is going on a bit more.

I do have fairly tall tires 33's and gearing 3.73, but wish i could get down to zero smoke, other than heat haze. I love diesels and cringe when i see guys smoking folks out... Doesn't do any of us any good when the EPA / State comes calling. Its fun on the track, but be kind to your fellow driver... even the A$$ Klowns.

Any ideas? Or is it just the nature of the beast?

quicksilvr

colder weather = more dense air = better performance

SRobertson

Yeah, figured but it was fairly noticeable... but fuel mileage overall has gone down. Smoke is still less but you would think with intercooler and turbo it wouldn't make that much of a difference.

VADERPOWER

colder weather=more dense air=better performance. this is true, to a point. with intercooled turbocharged diesels, the air can be too cold and hurt performance and thus mileage suffers. u here many many guys comment on this when winter hits. ive read somewere(cant think of were right now) but 60 to 65 degrees ambient temps r perfect for max effiency(both mileage and power) on our trucks.