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Universal HE351 VGT controller

It's nice that someone put that controller together. I always thought that a cable to the cab was a good compromise until the controller became available. You're not going to adjust on the fly really, just set it for the job at hand and fine tune as you go along. Better than nothing I figured.
 
I want the turbo to act like it's made to work, they have several sensors that the controller uses to operate as designed... too much electronic stuff for me to know about... And this can be changed on the fly as the user wants or the needs change.... it's like changing the turbine side while riding down the road ... maybe over time I will see how it works, if it doesn't suit me I'll try something else...
 
I think it's the ticket. Maybe not this turbo, but another VGT of some kind if not. I was just too dumb to figure out the programming to control it like that guy did. Glad he came along! And I'm glad you're jumping into it with both feet.
 
sctrailrider said:
Water cooled center... line in - line out.... the red plug can be seen in the pic..

I didn't have any cooling problem with the last motor, I really doubt I will have any trouble this time either, a few things are planed in that direction anyway tho.... Griffin rad, hyd fan, etc... really doubt the turbo will cause any negative stuff cooling wise.. I think cooling will only be a good thing for the turbo, at least Dodge thinks so...
Click to expand...
GM likes liquid cooled turbos as well. ALL the DURAMAX's have one.
 
Understood but the Dmax and the Cummins are DI engines that don't suffer the heating issues that we seem to encounter. Probably about the 3rd most common topic on this page!



scientific accuracy of statements in this post are under review by the Federal Bureau of Statistics.
 
restoguy said:
Understood but the Dmax and the Cummins are DI engines that don't suffer the heating issues that we seem to encounter. Probably about the 3rd most common topic on this page!



scientific accuracy of statements in this post are under review by the Federal Bureau of Statistics.
Click to expand...

The amount of heat added by the turbos cooling is minimal to say the least. GM only runs a 3/8" line from the turbo back to the upper hose for it.

turbovanman said:
I think they did the water cooling to stop the VGT system from overheating. My guess anyhow.
Click to expand...
GM started it with the IHI turbo in 01 which is not a VGT. I believe there reasoning for it was to keep the turbo cooler to reduce the chance of oil coking after a hot shutdown with no cool down period. The reasoning behind it from this view makes even more sense for a VGT.
 
restoguy said:
Understood but the Dmax and the Cummins are DI engines that don't suffer the heating issues that we seem to encounter. Probably about the 3rd most common topic on this page!



scientific accuracy of statements in this post are under review by the Federal Bureau of Statistics.
Click to expand...

Certain year Dmax's had cooling issues.

THEFERMANATOR said:
GM started it with the IHI turbo in 01 which is not a VGT. I believe there reasoning for it was to keep the turbo cooler to reduce the chance of oil coking after a hot shutdown with no cool down period. The reasoning behind it from this view makes even more sense for a VGT.
Click to expand...

They don't run water cooling on regular Holsets and when have you heard of a Holset Cummins failure? I know they use water cooling to prevent coking but they probably put it on the VGT due to the extra heat produced. :wacky:
 
turbovanman said:
Certain year Dmax's had cooling issues.
They don't run water cooling on regular Holsets and when have you heard of a Holset Cummins failure? I know they use water cooling to prevent coking but they probably put it on the VGT due to the extra heat produced. :wacky:
Click to expand...
Many of the overheaters have been found to be related to the heads and the thickness of the castings, high oil temps, and GM's poor engineering on not making the intake tract large enough and overworking the turbo while feeding it hot air. And I've replaced a few HOLSETS because of failures, so it isn't impossible.
 
If a VGT is not controlled properly, it will tend to have higher than normal back pressure due to not keeping up with the flow of the engine. By design, a VGT will have slightly higher back pressure, especially lower in the rpm band, which is why it spools so fast but having something that controls the vanes or nozzle more efficiently will minimize the back pressure a bit better.
 
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