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Author Topic: Catalytic converter to reduce exhaust odor  (Read 916 times)

snowman18

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Re: Catalytic converter to reduce exhaust odor
« Reply #15 on: March 05, 2020, 03:13:55 AM »
Personally I think your barking up the wrong tree, engine timing, dirty air filter, worn injector needle or incorrect pop off pressure would allow excessive fuel into the cylinder.

Once your engine is at operating temperature the noxious fumes your complaining about should be at a minimum.

Either purchase or make your own injector pop off tester, with the tester you can pump the pressure up just before the injector pops off, hold it at that pressure to see if the needle leaks.

If the injector pops off before or after the manufacturers specified pressure you add or remove shims, the needle is held in a closed position with a spring and it takes a desired fuel pressure to lift the spring to allow fuel to pass through the nozzle

It's the desired amount of fuel pressure that lifts the needle valve from a closed position.

A weak or broken spring will cause the needle to either not lift at all or to early. An early needle lift would starve the engine for fuel.

The DIY pop off tester in the video was made from a bottle jack.

If the nozzle is worn this will allow more fuel than is needed to pass, big higheway rigs the owners often install larger nozzles on the injectors for a boost in horse power.

You need a turbo that will give the engine lots of air the breath when your pushing extra fuel.



https://youtu.be/Oiz9C8pTDos


 
« Last Edit: March 05, 2020, 05:37:50 AM by snowman18 »

EdDee

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Re: Catalytic converter to reduce exhaust odor
« Reply #16 on: March 05, 2020, 09:57:15 AM »
Hey CuJet! (and the rest of you diesel ruffians out there!!)

A couple years back, I played with a vortex heat separator on the the exhaust/inlet on my 12/1 ... Got interesting results when pushing hot side back into the engine inlet, a little increase in power with the "re-burn" but nothing major to write home about... But... here's where the memory fails me... I seem to remember the exhaust final emissions smelling a whole lot better than before fitting... Unfortunately, my interest at the time was not in the smells but in the power changes... Ultimately I considered the marginal (at the time) improvements not worthy of the permanent fitting and maintenance long term - But - as I said, I was not specifically looking at exhaust odor, not even remotely.... Subsequently, unfortunately, I have disassembled the gubbins and re purposed it into various odds n sods, so to redo it would be a right pita!

Cheers
E
12/1 750RPM/9HP Roid 5kVA- WMO Disposal/Electricity & Hot Water Gen
12/1 650RPM/8HP Roid 4.5kVa - Demon Dino
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glort

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Re: Catalytic converter to reduce exhaust odor
« Reply #17 on: March 05, 2020, 10:13:27 AM »

Bout time you made a re appearance Ed!
See to it my make them far more regular Please!   ;D

EdDee

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Re: Catalytic converter to reduce exhaust odor
« Reply #18 on: March 05, 2020, 10:18:31 AM »
Lol... Without hijacking Chris's thread...

Will try, just flat out here at the mo, tidying up plenty of loose ends and trying to finish some projects...

Will stick my nose in more regularly when the panic is over and done!!

Lol
Ed
12/1 750RPM/9HP Roid 5kVA- WMO Disposal/Electricity & Hot Water Gen
12/1 650RPM/8HP Roid 4.5kVa - Demon Dino
Chinese Yanmar - Silent Runner with AutoStart
Classic Komatsu 1963 Dozer/Fergusson 35 Gold Belly ...
Bikes,Cars,Gunsmithing & Paintball...Oh yes, a 5Ha open air Workshop to play in!

cujet

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Re: Catalytic converter to reduce exhaust odor
« Reply #19 on: March 05, 2020, 11:16:33 PM »
Any thoughts on where I can find a cheap diesel catalyst that is "real". I can't imagine the $90 diesel catalysts on ebay have any precious metals in them.

Are you really sure you want to try this.

Catalyst poisoning refers to the partial or total deactivation of a catalyst by a chemical compound..

Sure, I'm willing to try it, as long as the cost is reasonable.

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cujet

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Re: Catalytic converter to reduce exhaust odor
« Reply #20 on: March 05, 2020, 11:20:40 PM »
Personally I think your barking up the wrong tree, engine timing, dirty air filter, worn injector needle or incorrect pop off pressure would allow excessive fuel into the cylinder.

Thanks, but I'm aware of the above. The engine runs cleanly, with invisible exhaust. The problem is that I'm very sensitive to it.

Case in point, my Jetta TDI developed a small leak at the EGR cooler shaft seal and I couldn't stand driving it. I'm that sensitive to it. That's a clean engine with modern controls too.
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snowman18

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Re: Catalytic converter to reduce exhaust odor
« Reply #21 on: March 05, 2020, 11:58:42 PM »
Personally I think your barking up the wrong tree, engine timing, dirty air filter, worn injector needle or incorrect pop off pressure would allow excessive fuel into the cylinder.

Thanks, but I'm aware of the above. The engine runs cleanly, with invisible exhaust. The problem is that I'm very sensitive to it.

Case in point, my Jetta TDI developed a small leak at the EGR cooler shaft seal and I couldn't stand driving it. I'm that sensitive to it. That's a clean engine with modern controls too.

Didn't V.W. fiddle with the emissions software. perhaps you should thank them for your having developed a sensitivity to the sulfur in diesel fuel.

Even the ultra low sulfur diesel fuel may contain as much as 1000 ppm.

This fuel is known as ultra-low sulfur diesel (ULSD). ... The sulfur content of the fuel used in marine vessels operating in these ECAs may not exceed 0.10 weight percent (1000 ppm).
« Last Edit: March 06, 2020, 05:47:00 AM by snowman18 »

cujet

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Re: Catalytic converter to reduce exhaust odor
« Reply #22 on: March 08, 2020, 06:15:00 PM »
I ordered the following diesel catalytic converter, with a metallic substrate. The metallic version is supposed to be a bit more robust and much lower restriction. I hope it shows up as the part may be obsolete. If this works out, I may purchase a larger unit for my 20/2 Listeroid. It should make the engine a touch quieter too. Although, I use an automotive muffler and it's pretty quiet.

"Magnaflow 53004DM_Metallic Substrate Diesel Catalytic Converter"


EDIT: Foiled! Order cancelled by vendor. Ugh. The search continues.


« Last Edit: March 09, 2020, 07:35:52 PM by cujet »
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gusbratz

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Re: Catalytic converter to reduce exhaust odor
« Reply #23 on: March 13, 2020, 12:13:57 PM »
I also hate the smell of diesel, I hate it when I get stuck behind a big truck when I am on my motorcycle going up a grade and you just have to smell it stinking. That being said I haven't' been bothered by my 8/1 when it is running the whole house during power outages. It does seem to be more offensive when I am running the house on the lister and the outside air is real cold and dry like -15*F.  I like glorts' idea. If I get bothered by mine I will just build a stack and get the emission up above me. seems like that was the low tech solution all through the industrial revolution for coal fired mills and such. For what it's worth I do have the listerish recommended 3'X4' brick below ground exhaust box built. it is absolutely astounding how quiet it is. you can kneel down on the ground and put your ear up to it and barley hear the exhaust.