2011 6.7 with a 2015 turbo.....

[Fast-6.0]

The issue is not that the PCM limits the boost at 30psi. The issue is that the VGT duty cycle is limited, and on a larger turbine wheel that limits how hard you drive the turbo.

 

[Fast-6.0]

Could the tuning on the 4094 be figured out faster if Elite had the truck in house?

Honestly Dan is excellent on feedback and testing.

Yes, if they built one and installed it and tested it in house it would be much easier when they sell them to customers.

It doesn't always get done that way on all products. Takes a lot of money and time.

The Elite truck had a 3794 on it before the kit was sold. The 4094 was swapped later but the issue was '13's and newer, we don't have the same problem on our truck.

 

[gfulton]

Thanks for the clarification Tadd. I hope Morgans cool with this, were kinda mucking up his thread, but this is some pretty informative stuff.

 

[CATDiezel]

The issue is not that the PCM limits the boost at 30psi. The issue is that the VGT duty cycle is limited, and on a larger turbine wheel that limits how hard you drive the turbo.

I'm not familiar with how the actuator receives it's signal. Is it a 4-20ma going to the actuator?

Also, is the restriction do to physical limitation of the actuator being stroked out? Assuming the ecm thinks it's controlling a stock turbo still...

 

[Morgan@Midwest Diesel & Auto]

The issue is not that the PCM limits the boost at 30psi. The issue is that the VGT duty cycle is limited, and on a larger turbine wheel that limits how hard you drive the turbo.

Yes. Once the tables are worked out they will be awesome.

The Elite truck had a 3794 on it before the kit was sold. The 4094 was swapped later but the issue was '13's and newer, we don't have the same problem on our truck.

Like I said. Its not always possible to test every variation on every model. Hope you guys get it all squred away

Thanks for the clarification Tadd. I hope Morgans cool with this, were kinda mucking up his thread, but this is some pretty informative stuff.

No problem. This was supposed to be an informative thread for the '15 vgt. So it's kinda related.

 

[Morgan@Midwest Diesel & Auto]

I'm not familiar with how the actuator receives it's signal. Is it a 4-20ma going to the actuator?



Also, is the restriction do to physical limitation of the actuator being stroked out? Assuming the ecm thinks it's controlling a stock turbo still...

It has more to do with the limits in the tuning tables that do not allow for the position that the larger turbos need to get the vanes at to operate and spool correctly.

 

[mattmal9]

Thanks for the clarification Tadd. I hope Morgans cool with this, were kinda mucking up his thread, but this is some pretty informative stuff.

Agree completely. Sorry for derailing, just trying to learn more.

 

[CATDiezel]

It has more to do with the limits in the tuning tables that do not allow for the position that the larger turbos need to get the vanes at to operate and spool correctly.

I guess what im asking is assuming your tuning a stock turbo'd truck, Is the actuator maxed out on a stock turbo with the duty cycle of whatever your imputing as max?? ( I ask in regard to a stock turbo because the truck still thinks its running a stock turbo with its designed limitations)

Also, What is the signal going to the actuator? ie 4-20ma or a voltage reference? 0-8v or 0-5v ?

 

[Morgan@Midwest Diesel & Auto]

No, the tuning tables state that it can only send a certain amount of signal in first gear. Which is not working with different turbos.

I honestly don't know what signal type it is.

 

[Breaking Habits]

No, the tuning tables state that it can only send a certain amount of signal in first gear. Which is not working with different turbos.

I honestly don't know what signal type it is.

Solution, 4r100 swap.. Lol

 

[Morgan@Midwest Diesel & Auto]

Solution, 4r100 swap.. Lol

Yes! Let's put a weaker trans in!

 

[ChattyCathy]

Yes! Let's put a weaker trans in!

Serious?

 

[Fast-6.0]

I guess what im asking is assuming your tuning a stock turbo'd truck, Is the actuator maxed out on a stock turbo with the duty cycle of whatever your imputing as max?? ( I ask in regard to a stock turbo because the truck still thinks its running a stock turbo with its designed limitations)

Also, What is the signal going to the actuator? ie 4-20ma or a voltage reference? 0-8v or 0-5v ?

The issue is not the mechanical side of the actuator. And getting enough Duty cycle down low in the rpm band is not a problem, we can get what we need. The issue is at WOT we can't get what we want. The PCM is limiting the duty cycle and we haven't found what it is.

The signal is a 5v signal. I haven't scoped it to give you anymore data than that.

 

[dseitler]

It won't let the stock turbo produce over 30 pounds of boost either. Not speaking for everyone but it would not produce over 30 pounds of boost with my truck with dual fuelers.


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[dseitler]

It won't let the stock turbo produce over 30 pounds of boost either. Not speaking for everyone but it would not produce over 30 pounds of boost with my truck with dual fuelers.


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[Jesse_01]

How was the 1st h&s tune that came out putting out more than 30psi?

 

[WHY NOT]

It was only on the 11/12 trucks tunes I believe. The 13s maxxed out about 26.


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[gfulton]

I know my 12' would push 32psi all day with the .21 or .23 file, I don't remember which one.

 

[dseitler]

I have run all of the H&S tunes up to calibration 4 along with SPE, GearHead and Elite and not one has produce over 30 pounds of boost on my 13 with the stock turbo and dual fuelers. But I'm not giving up until I hit 50 lbs. LOL


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[Breaking Habits]

I say just weld the veins closed.. It'll do 60psi for about 20 seconds..


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