Electronic wastegate

[JHayward]

Can anyone give us some details on this? Is this related to a VGT in any way? Does the electronic wastegate function only at high boost, or is there a low speed boost enhancing function to it? Is the "pre-equipped" exhaust brake feature related to this?



Thanks!

 

[Joseph Donnelly]

Not related to variable geometry. The electronic control allows Cummins to make the boost pressure a part of their combustion/emissions "recipe. " Not related to exhaust brake either.

 

[JHayward]

Thanks for the quick reply! Too bad though.

 

[turbo lcc]

VGT

So does the 2004. 5 RAM have the VGT turbo or ???

 

[Joseph Donnelly]

NO.



Vgt is expensive to build, requires a lot of computer, etc. It is also not very reliable over time because those moving parts are in a very hostile environment--exhaust system, and the hot part of it, with soot, etc. Cummins mentioned this at the intro as reasons not to use variable geometry. The new HY35 has a slightly larger compressor side, oiling puddles under the bearings, and electronic control of the pneumatic wastegate pressure pot. The flange is a little thicker for better gasket durability. That is it for the turbo.

 

[WeirCummin]

Cummins had been using the electronically controlled wastegate on their ISM/ISX for some time before the introduction of the VGT/EGR. It's a solenoid valve or vavles that is controlled by the ECM.



Joe, I have to disagree with you about the reliability of the VGT. There is only one moving part in the "hostile environment", the sliding nozzle that controls housing size. The other moving parts are located in the cartridge or center section which is water cooled. The VGT on the "Tornado" by no means has proven itself as it only has 22k miles on it, but all my reliability issues have revolved around the pneumatic supply and control system.

Vgt is expensive to build, requires a lot of computer

That's so true, had I known the problems and cost it has taken to get the VGT up and running I would have chosen a different route.



There's no way that the VGT would hold up to the fuel/power of Sickly

 

[JPM]

Moving parts inside an exhaust system??? Ever take an exhaust valve from a motorcycle apart? They get real nasty. I had an Aerocharger turbo with move-able vanes, they over heated and got all messed up I think I'd stay away from anything moving around in your exhaust system , unless you're playing with it. In trucks that need to be dependable, I don't know.