Truckers, lets see your rigs!

[SmokinCAT]

Originally Posted by malibu795

All I got to go off is marine 430hp version.. data sheet says 830°F in the turbo outlet... What turbo they use?? IDK And intake manifold psi of 60 in hg, is gauge or absolute pressure.. it's not noted..

Hopefully I can get this FL60 up and running this week..

That would have a water cooled turbine housing, not even a close comparison.

[jfaulkner]

Originally Posted by malibu795

What usual temp drop across the turbo?
I've heard 300-350° I've stuck mine preturbo on the 8.3 figure 1300° be a safe limit

Roughly 300 on a single and 500 on compounds if you put the probe after the 2nd. I’ve got one in between the turbos and it follows the manifold temp exactly.

[jfaulkner]

Originally Posted by Meyers Farms

Very cool picture! Glad to see you stop back in here and offer some insight. I enjoyed the update on your working toy truck.

My grandpa sold his trucks and milk business so dad/uncle wouldn’t want to truck because even then it sucked. That failed because my uncle went to work for the CIA and my dad bought a truck. This was his first.

[malibu795]

Originally Posted by SmokinCAT

That would have a water cooled turbine housing, not even a close comparison.

Off the Marine mechinal Cummins and cats and Detroits I worked on in the Navy.. all the see water was evacuated out about 6" downstream of the turbo.. not saying your wrong.. just pointing out there are non water-cooled turbos

Originally Posted by jfaulkner

Roughly 300 on a single and 500 on compounds if you put the probe after the 2nd. I’ve got one in between the turbos and it follows the manifold temp exactly.

That would put it mid 1100° in the manifold
I shouldn't need twins on a 400hp 8.3 lol

[SmokinCAT]

Originally Posted by malibu795

Off the Marine mechinal Cummins and cats and Detroits I worked on in the Navy.. all the see water was evacuated out about 6" downstream of the turbo.. not saying your wrong.. just pointing out there are non water-cooled turbos




That would put it mid 1100° in the manifold
I shouldn't need twins on a 400hp 8.3 lol

A quick search of marine 8.3 engine shows a water cooled housing.

[biggy238]

Why does the on highway market place their probes in the turbine outlet? I've never understood this, unless it's the thought that the cladding will melt in the manifold?

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[allan5oh]

Originally Posted by SmokinCAT

That is a bit much, aluminum piston engine shouldn’t see much over 1200* sustained.

Do you mean 2 piece? It's weird because the tdi guys with their all aluminum pistons run more than that sustained and will hit 1600 intermittent. Apple's to oranges I know.

[jfaulkner]

Originally Posted by biggy238

Why does the on highway market place their probes in the turbine outlet? I've never understood this, unless it's the thought that the cladding will melt in the manifold?

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Safety for one and most steering wheel holders don’t pay attention to them anyway. I put the OEM probe in the manifold of a 1000hp glider and it didn’t last one trip. Replaced the probe and it died within 5mi. Don’t know who makes this new junk but they’re not normal thermocouples. They look like DPF temp probes and are absolute chit and close to $200 each. I apparently took this pic with a potato but it’s the only one I could find.

The link I posted earlier are like $65 and I think they said they measure between 30*-2500* and have never had one fail but if they do they replace them. But they don’t work with the new multiplexed gauges.

[allan5oh]

You'd need a convertor for them to work multiplexed

I'm guessing you would recommend the slower ones? Still a 1/8" npt tap?

[biggy238]

Does anyone offer add-ons for paccars CAN modules? I know isspro and a few others off CAN-ed sensor groups, as well as cat, but that doesn't mean the PGN or data are compatible

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[jfaulkner]

Originally Posted by allan5oh

You'd need a convertor for them to work multiplexed

I'm guessing you would recommend the slower ones? Still a 1/8" npt tap?

Speed isn’t an issue. I want to know Metal temp not air temp so I would think the slower reaction would better reflect the actual temps.

[jfaulkner]

Got a turbo question. How much does dual vs single scroll affect turbo lag vs housing size. Got a 28cm E trim on manifold which is a single scroll housing. I tried a 32cm single but was a smoky pig. I’ve got a 40cm dual scroll housing but before I go to the effort of trying it is there any rule of thumb to compare them. I guess what I’m looking for is “a 40cm dual scroll is the same as a xx cm open” I’m looking to lower pressure without sacrificing performance.

[malibu795]

Dual scroll usually reduces lag,
kinda like going from one big hose at a distance from the turbine to two small hose up close to the turbine

[Rig Wrench]

Originally Posted by jfaulkner

Got a turbo question. How much does dual vs single scroll affect turbo lag vs housing size. Got a 28cm E trim on manifold which is a single scroll housing. I tried a 32cm single but was a smoky pig. I’ve got a 40cm dual scroll housing but before I go to the effort of trying it is there any rule of thumb to compare them. I guess what I’m looking for is “a 40cm dual scroll is the same as a xx cm open” I’m looking to lower pressure without sacrificing performance.

Wouldn't that depend on the size of each scroll? Essentially having to different a/r in one housing? I'm pretty turbo dumb. I like the idea though. Like a vgt without the extra parts.

[jfaulkner]

Well I get that it reduces lag but going from 28 single to 32 single made it laggy. What I’m wondering is how a 40 dual scroll compares to either of the 2 I’ve tried. I’m not against trying it the problem is I have to drill the bolt holes out to fit the 1/2” studs but if it sucks I have to hammer bushings back in the bigger holes. Trying not to drill too many borrowed housings.

[allan5oh]

Originally Posted by JWhite

We always run Omega brand, 1/4" if the port size allows, otherwise 3/16". I wouldn't recommend running 1/8" in the exhaust manifold. If you're running a Data logger that allows an E type, I suggest that for a better resolution at lower temps.

And where the hell do you find a 3/16" NPT tap!?

I see your point though, hard to trust 27 TPI.

[inline6359]

Originally Posted by allan5oh

And where the hell do you find a 3/16" NPT tap!?

I took that as thermocouple diameter and not thread size?

[malibu795]

Anyone got a part number for the spacer? I can get the zip ties. frieghtliner parts guys don't know anything about the cylinder spacer

[BRE]

Let the arse chewing begin... 4 consecutive tanks with nothing better than 5.0mpg


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[JWhite]

Originally Posted by allan5oh

And where the hell do you find a 3/16" NPT tap!?

I see your point though, hard to trust 27 TPI.

Originally Posted by inline6359

I took that as thermocouple diameter and not thread size?

Yes, that's the thermocouple diameter. I wouldn't try to run a 1/4" thermocouple with a bore through 1/8 NPT fitting, getting kind of thin. Bump up to a 1/4" NPT compression fitting with a 1/4" probe.