FTN's T4/SXE Build/Conversion Thread

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Mar 26, 2023 | 07:08 AM

#1141

FordTruckNoob

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From: Henderson, NV

Quote:

Originally Posted by RacinJasonWV

Have you considered speaking with Mario G at NightShiftDiesel.com for advice?

I had not thought of that until you mentioned it. I shall give him a call.

Mar 26, 2023 | 09:51 AM

#1142

FordTruckNoob

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From: Henderson, NV

I am now contemplating atmospheric turbo with air filter directly on its inlet just above valley turbo and ahead of the cowl. Then make cowl induction hood. The noise should be glorious.

Mar 27, 2023 | 05:44 AM

#1143

brokestroke

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Have you thought about trying the 3 stage mechanical actuator? Might to not even need a BOV if it functions smoother/faster than the electric version.

Mar 27, 2023 | 05:59 AM

#1144

FordTruckNoob

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From: Henderson, NV

Quote:

Originally Posted by brokestroke

Have you thought about trying the 3 stage mechanical actuator? Might to not even need a BOV if it functions smoother/faster than the electric version.

Not really. The actuator responding faster is not going to help I think. My theory of how the S366 broke is as follows:

Running hard, the Turbonator has overspun the S366 at requested pressure ratio.
Let off go pedal suddenly, Turbonator responds to reduced EBP by shutting vanes. This will happen whether if it is electronic or mechanical.
Turbo is still spinning like a hamster on meth, boost is still building in intake with nowhere to go, compressor wheel gets stopped by air trying to flow the opposite direction. <--- This is the primary reason fora BOV.
Turbine has huge polar intertia, keeps trying to spin and snaps shaft.
Goddam Cheby I was racing drove off into the distance laughing.

As you can see, going compound is a reliabilty mod.

Mar 27, 2023 | 06:23 AM

#1145

brokestroke

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Quote:

Originally Posted by FordTruckNoob

Not really. The actuator responding faster is not going to help I think. My theory of how the S366 broke is as follows:

Running hard, the Turbonator has overspun the S366 at requested pressure ratio.
Let off go pedal suddenly, Turbonator responds to reduced EBP by shutting vanes. This will happen whether if it is electronic or mechanical.
Turbo is still spinning like a hamster on meth, boost is still building in intake with nowhere to go, compressor wheel gets stopped by air trying to flow the opposite direction. <--- This is the primary reason fora BOV.
Turbine has huge polar intertia, keeps trying to spin and snaps shaft.
Goddam Cheby I was racing drove off into the distance laughing.

As you can see, going compound is a reliabilty mod.

Wasn't that issue in the tuning of the module? There should be some delay between letting off and the vanes closing since ebp fades instead of instantly dropping off to zero. It should function like a standard diesel vgt without a BOV and keep everything close to 1:1.

*edit
Wouldn't that failure be more attributed to a turbine over speed than surge because diesel motors don't have butterfly valves in the intake? (Reason for BOVs)

Mar 27, 2023 | 06:55 AM

#1146

FordTruckNoob

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From: Henderson, NV

Quote:

Originally Posted by brokestroke

Well, I can tell you that even with a lack of butterfly valves there is a good amount of air coming out the BOV when I let off the go pedal. That S366 shaft broke because there was differential torque applied to the shaft in addition to the overspeed. Overspeeding alone would not snap a shaft.

@Y2KW57 Can you move this post and the three above by brokestroke and me to this thread so we don't clutter up PriusLover's thread please?

Mar 27, 2023 | 08:17 PM

#1147

FordTruckNoob

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From: Henderson, NV

Well, the 366 is on its way to get rebuilt with a ball-bearing conversion. So begins the madness.

Mar 30, 2023 | 11:54 AM

#1148

FordTruckNoob

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From: Henderson, NV

The compound project is in jeopardy. I just got a call telling me my 366 may be too far gone to be rebuilt.

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Mar 30, 2023 | 11:59 AM

#1149

Wes444

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From: Muskogee, Ok

They out of JB weld, duct tape and zip ties?

Mar 30, 2023 | 12:26 PM

#1150

FordTruckNoob

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From: Henderson, NV

Apparently so. Goddam supply chain backups. I blame Buttigieg.

Apr 12, 2023 | 03:32 PM

#1151

FordTruckNoob

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From: Henderson, NV

I forgot to mention that my actuator failed in a vanes closed position two days ago. Pretty much the same failure mode I had when Sous and Kate came through MN to visit. I have what I have been assured is a genuine Garrett/Hella REA inbound.

Apr 12, 2023 | 09:37 PM

#1152

PriusLover

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Really don't like how it doesn't have a spring built in to open the vanes in case the actuator fails. You won't really have much power but at least you won't blow up the turbo that way.

Apr 12, 2023 | 09:43 PM

#1153

Sous

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From: Lake Hartwell, GA

Even with Leonard's truck on a crutch so to speak, it ran like a beast when we visited him near his home. It is not even in the same category as my 7.3L.

Apr 13, 2023 | 05:47 AM

#1154

FordTruckNoob

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From: Henderson, NV

Quote:

Originally Posted by PriusLover

Really don't like how it doesn't have a spring built in to open the vanes in case the actuator fails. You won't really have much power but at least you won't blow up the turbo that way.

That is a limitation of the way the actuator works and the link that connects it to the vane mechanism. I suppose I could engineer a link that with a quick disconnect that can be activated by a cable from the cabin.
Thanks for pointing me inthe right direction with your research into actuators though. I amnow looking into getting this: https://www.g3concepts.com/g3-rea-master

Quote:

Originally Posted by Sous

Even with Leonard's truck on a crutch so to speak, it ran like a beast when we visited him near his home. It is not even in the same category as my 7.3L.

That's because the vanes were in the right position for low-end pulls. Get anywhere above 45psi EBP and it bogged,

Apr 13, 2023 | 06:02 AM

#1155

FordTruckNoob

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From: Henderson, NV

I do believe Ifound the controller DPS uses/used.
Controller - Diesel Force