Originally Posted by signature600

Europe is YEARS ahead of us in both Diesel technology, and fuel quality, both BIG problems for us on this side of the pond.

Originally Posted by purduepurdy

You also pay for the SCR unit itself, they use vanadium and zeolites mainly in these units and it does add some cost to the powertrain. One nice thing that you stated earlier was the tuning for efficiency. You can add more timing to the engines which does bumps up the NOx, but that can be taken out by the SCR depending upon its efficiency. With diesel prices as expensive as they are, any gain in mpg will eventually pay off the SCR, never the less having a happier engine with better timing and less EGR soot.

Originally Posted by screagle2

I am not sure who gave you your guessformation, but of all test combines in our area in wheat harvest, the only ones that performed acceptable were the CNH with IVECO, not Fiat......Never has been Fiat.
The 8120's and 9120's with Urea are using Tier II with Urea, and meeting requirements for Tier IVa and b. Tier II engines have the torque that you are used to, and have gained more than 26% fuell economy with Urea vs. TierIII. They are running 800-900 degree exhaust temps, while Deere's egr systems are exceeding 1500 degrees. It takes approximately 40 gal. of Urea for each 900 gal. of fuel. Watch for 9770's with a different back end, and a venturi exhaust, and that it a test machine.
JD test 4 wheel drives are having the same heat issues.
As much as I have objected to Urea, it looks to be the best system by far.
BTW. the IVECO's are burning much less fuel than the Deere's we replaced. Not a slam on Deere by any means, but Europe is years ahead of us in diesel technology. I was going to trade 3 8010's this fall to get ahead of Urea inj., but now may wait just to get it.......Did not hink I would ever think that.
The hassle may be worth it for the duel economy, and less fire danger.