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Is it EPA approved or not consider as illegal because it no longer deletes the EPA function of disposing of the emissions in an EPA approved manner, big difference.

Is it FSA legal, will a dealer not honor a warranty because of an aftermarket tune, IMHO, it's riding below radar level.
they are discussing a way to keep the transmission tune , AND reinstall the old version GDE tuned ECM , considered illegal by EPA ,
that part would not please the EPA .. reason why RAM259 asks to keep in private messages .
 

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We are finalizing an EPA compliant tunes that meets all federal regulations for the RAM engine ecm and transmission ecm. We hope to have a 49 state solution in the June time frame (this is contingent on how long covid keeps everyone shut down) and a CARB EO later this summer. The federal tests include: FTP75, HWFEC (highway fuel economy cycle), US06 and SC03 at a certified emission lab.

Once available, both tunes will be delivered with OBD flash tools, no more ecm swaps. Existing customers will need to have dealer overwrite existing tune to bring it back to stock, then the flash tool can be used. It is a virtual read process and that is why it cannot be used over an existing tune. The tool is $200 and reflash is $50 for existing customers, less shipping/handling.

The new tunes drive exactly the same as the older versions. Still 30hp, 65ftlb over stock, less turbo lag, reduced soot formation, cleaner engine oil, minimized risk of fire in intake, and 2-4 mpg gain over recall tune from FCA.

The new engine tune will not support any powertrain hardware modifications, it is designed for stock hardware only.

In order to meet the emission requirements, there were several areas we had to address in the FCA calibration. First off, NOx is the critical emission and most difficult to meet the targets. The temperature of the exhaust system if vital to have good NOx conversion through the SCR cat. We employed a 'fast warm-up' mode on a cold engine to reach 240 C face temp on SCR cat much quicker than factory. This means we are converting NOx earlier in test cycle. Then we had to address the extremely high egr gas temps that are pumped back into the intake. This involved modifying a post injection event, reduce egr flowrate and use more egr cooling to keep gas temps in the plastic intake below melting point of the thermoplastic manifold. Then the injection events (pilots, main and post injections) had to be tweaked to minimize soot formation at the lower Lambda regions. The turbo management needed modification to have the proper pressure drop from exhaust manifold to intake to allow us to not need to use the intake throttle as much as factory as this part hurts efficiency. We also modified the SCR dosing and catalyst storage model to minimize the risk of overdosing, while still dosing enough to get good NOx conversion.

We are pleased with the results thus far. A more responsive vehicle that gets better fuel economy. For those that never had a GDE tune, this is night and day better than what FCA has put out.
I installed my new EPA compliant tune two weeks and enjoyed the truck until this past weekend when I towed my boat to the Texas Coast. My coolant temps reached 228 and my oil temp reached 240. This is by far the highest temps I have ever seen on this truck. I had to drive 60 MPH on a busy Texas interstate where the speed limit is 75 MPH, dangerous to say the least. If I can't get this remedied I am just going to remove the tune and chalk it up to lost cause.
 

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I installed my new EPA compliant tune two weeks and enjoyed the truck until this past weekend when I towed my boat to the Texas Coast. My coolant temps reached 228 and my oil temp reached 240. This is by far the highest temps I have ever seen on this truck. I had to drive 60 MPH on a busy Texas interstate where the speed limit is 75 MPH, dangerous to say the least. If I can't get this remedied I am just going to remove the tune and chalk it up to lost cause.
I'm assuming you've towed the boat before the tune in the same conditions, temperature and location, as you did after tuning? What were your temperatures before? 240 for the oil as reasonable as is 228 for the coolant. I don't like seeing it go higher than this. But knowing what it was before would be beneficial.
 
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Discussion Starter #204
I installed my new EPA compliant tune two weeks and enjoyed the truck until this past weekend when I towed my boat to the Texas Coast. My coolant temps reached 228 and my oil temp reached 240. This is by far the highest temps I have ever seen on this truck. I had to drive 60 MPH on a busy Texas interstate where the speed limit is 75 MPH, dangerous to say the least. If I can't get this remedied I am just going to remove the tune and chalk it up to lost cause.
The GDE tune is not a factor for towing temps. This is based on load and ambient conditions. Peak coolant is 242 F and around 272 F for oil, then the engine is in a derate mode where it pulls fuel to reduce heat load and vehicle slows down. This truck is cooling system limited in worst case conditions.
 

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I got the new tune a few days ago mainly to get the transmission tune back. I have the old GDE tuned ECU but decided to see how the new tune compares. I could be crazy but a swear the new EPA compliant tune feels like it has a slight edge over the old tune. I haven't driven enough to get good MPG estimates but some on some of the drives I have done the instant on the dash shows the same if not better holding consistent speeds. I am going to give it a tank or two to really get a good comparison but from what is see so far the new tune lives up to what I expect from GDE. My only concern is the EGR being on. We have heard EGR is bad so long its hard to come to terms that just because it is cleaner it won't be a bad thing for the engine.
 
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