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OS 120 smoke system problems

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Kevin Moore29/06/2008 22:04:00
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14 forum posts

Iv'e tried to install a smoke system with this engine and the injector for the smoke was tapped into a 90 degree knuckle joint directly next to the engine. The diesel is fed to this injector thru tygon tubing but this just melted off the injector within 30 seconds of start up. I then put the exhaust back on the original header that came with it and tapped the injector into the main body of the exhaust but again the tygon just melted off after around 45 seconds.

Is there any other way / type of tubing that will not be affected so badly by the heat. I've toyed with the idea of using a 120mm flexible extension before the main exhaust body but the injector really needs to be in the hottest point of the exhaust and may not produce smoke this far back in the system.

Any help thoughtsd appreciated

Eric Bray29/06/2008 22:57:00
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6600 forum posts
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Is it the exhaust heat or the oil that is dissolving the tubing?
Kevin Moore30/06/2008 00:33:00
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14 forum posts
definitely the exhaust heat, just run the engine in and haven't put any oil thru yet. Difficult to get to that stage as the tygon only lasts 40 seconds or so.
Ultymate30/06/2008 06:55:00
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1700 forum posts
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Tygon is useless for that purpose it just melts when subjected to exhaust heat. What you need is some of the black fuel tubing used on petrol models. it will need copper wiring to the nipple on the exhaust and will need periodical replacement as it too will eventually fail due to the heat.
Tim Mackey30/06/2008 11:00:00
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20919 forum posts
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I presume Ulty means "tying on tightly" ( as in a tie wrap thingy ) with copper wire.
Ultymate30/06/2008 11:37:00
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1700 forum posts
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Affirmative Timbo

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