Ski Bum Truck V2.0, F450 Rough Road RV

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java

Expedition Leader
Pacific Northwest yetti said:
I thought about one on my 6.0, when I was farming full time, just for the dust. If they had made one for it, I would of done so. I was always a little worried about the tube size, and friction loss, if i remember right it would have to of been 5-6 inches.
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That's my thinking too, dust not water.... I am having a hell of a time figuring out cfm needed for this monster, online calculators range from nearly nothing to a jet engine feeding it.

Like I said, the Australian guys are using 4" for the 6.7, that's all the info I have.

The snorkel tube inside the fender is roughly avg of 4" but not round at all.

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Pacific Northwest yetti

Pacific Northwest yetti

Expedition Medic
I have a BullyDog cold air intake, and the tube is 6ish inches- so i figured i would of had to just continue that diameter. I was amazed, at how much the MAF controls the engine, and even the shift points, made me even more nervous about changing it.
 
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java

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Pacific Northwest yetti said:
I have a BullyDog cold air intake, and the tube is 6ish inches- so i figured i would of had to just continue that diameter. I was amazed, at how much the MAF controls the engine, and even the shift points, made me even more nervous about changing it.
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Yes its larger after the filter for sure, My fist fits on the engine side.


B85 said:
Add 20% and call it good. So 5" My .02 cents.
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I like your thinking :D

Now for some data that may or may not be useful.
This one says 1187CFM
46968134264_f875000db6_b.jpg


This one says 19K CFM.... (using the VE plugged from above since I have zero clue)
33880287788_2a3ecf8086_b.jpg


This one says 1377 USING 45PSI as a target.
33880287758_df0702388e_b.jpg


CFM for pipe sizing in dust collectors, low pressure high volume, intake would be similar? No idea what kind of FPM an intake velocity is tho.
47757576561_7879f19cf0_b.jpg


Or a calculator for compressor systems, I just plugged 1psi in?
40791099783_f3dfed63ba_b.jpg


Or going backwards, intake velocity would need to be ~200FPS to flow 1400CFM through a 4" pipe.
40791131433_e38efa4f32_z.jpg




Any more thoughts from smarter people?! :D
 
Ozrockrat

Ozrockrat

Expedition Leader
4” with no precleaner for normal use but a scoop facing forward. Add a precleaner if you are going to be crawling along in constant fesh fesh.

Getting the intake a lot higher will reduce the dust levels and the scoop will provide some form of Ram Air effect to overcome any restrictions when you are pushing it down the highway.

Plus it’s a lot easier to buy 4” and it will reduce the footprint on the truck.

You could always modify the air cleaner intake to come through the fender and just throw a precleaner on when really doing the dirty stuff.

Personally being a lazy bugger. I would carry a spare filter and change as required.
 
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Ozrockrat said:
4” with no precleaner for normal use but a scoop facing forward. Add a precleaner if you are going to be crawling along in constant fesh fesh.

Getting the intake a lot higher will reduce the dust levels and the scoop will provide some form of Ram Air effect to overcome any restrictions when you are pushing it down the highway.

Plus it’s a lot easier to buy 4” and it will reduce the footprint on the truck.

You could always modify the air cleaner intake to come through the fender and just throw a precleaner on when really doing the dirty stuff.

Personally being a lazy bugger. I would carry a spare filter and change as required.
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The filter is HUGE. But yeah carrying a spare would be the easy button, except its HUGE to stash somewhere.

If I am aiming for 1400ish CFM, the Donaldson precleaner (rated for 1300) I was looking at has a 6" outlet. I don't want to run 6" tube, that would be ridiculously large looking.....

No real long fesh fesh stretches, just dusty gravel roads. Maybe not worth the project.... I was also thinking just up thru the fender, but it might block a bit of visibility there.
 
Ozrockrat

Ozrockrat

Expedition Leader
Did you split that filter open to see how full it was? Also did you consider using a filter skin (generally oiled foam) on the intake as a prefilter. Easy to carry a spare and also easy to remove and clean.
 
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Ozrockrat said:
Did you split that filter open to see how full it was? Also did you consider using a filter skin (generally oiled foam) on the intake as a prefilter. Easy to carry a spare and also easy to remove and clean.
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I did not split it, but I will dig it out of the trash and do that!

No, not really a good spot in the intake for an oiled prefilter I dont think.
 
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locrwln

locrwln

Expedition Leader
Those "Donaldson" style filters can hold a lot of dirt and still work just fine. I ran one on my 7.3 for a very long time and run one in my Duramax and usually get 60k out of them. I just gently knock the big stuff (bugs and debris) out on a hard surface, take a blow gun and blow out the remainder of loose stuff. Never had the restriction gauge move and never had any dirt in the intake track.

Jack
 
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java

Expedition Leader
locrwln said:
Those "Donaldson" style filters can hold a lot of dirt and still work just fine. I ran one on my 7.3 for a very long time and run one in my Duramax. I just gently knock the big stuff out on the garage floor and take a blow gun and blow out the remainder of loose stuff. Never had the restriction gauge move and never had any dirt in the intake track.

Jack
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I belive it is a Donaldson just rebranded Motorcraft.

I cut it open. I was holding A LOT of dirt!

Look at the bench under where I cut it... Second pic is a pleat opened up on the engine side.
55accbc487dff2e717d1d1025a85511a.jpg

b5edecb53d7d3888db552f729e94d60a.jpg


efbefec69198e8098e87171315afebfc.jpg


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