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Thread: Workshop exhaust system

  1. 16th August 2011, 03:28 PM #1
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    land864
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    Workshop exhaust system

    I am currently designing a vehicle workshop exhaust system for a client.

    Mostly it will just be services , oil changes , tunes and minor repairs.

    I have read on here of EGTs around 600 Celsius.

    I guess that is at full noise so what would EGT's be at idle or during a service/ in shop test?

    It's a government dept so it will mainly be Toybotas and small tractors

    Pete G
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  2. 16th August 2011, 03:39 PM #2
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    Your post is unclear - are you designing (a) an extraction/ventilation system for the whole workshop, or (b) a system to be fitted directly to the exhaust of vehicles being tuned?

    If (a), then EGTs will be irrelevant as dilution will cool it down to near ambient.

    If (b), then will they be doing dyno tuning? If you are just revving an engine in neutral you will only see EGTs up to about 300oC pre turbo, which will probably have cooled to ~100oC or less by the time you get to the exhaust exit.

    If they have a dyno then you could see about 800oC pre turbo, and maybe as high as 400oC at the end of the exhaust.
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  3. 16th August 2011, 03:49 PM #3
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    Sorry , not a general exhaust for the workshop but a fan assisted fit to exhausts , obviously diluted by workshop air , say a 100mm flex tube around a vehicle exhaust.
    No dyno or anything that complex , just a department workshop to carry out minor repairs and say grease and oil changes
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  4. 16th August 2011, 04:31 PM #4
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    Quote Originally Posted by land864 View Post
    Sorry , not a general exhaust for the workshop but a fan assisted fit to exhausts , obviously diluted by workshop air , say a 100mm flex tube around a vehicle exhaust.
    No dyno or anything that complex , just a department workshop to carry out minor repairs and say grease and oil changes
    In that case almost any system will do as long as it is able to flow more air than the largest engine they will be working on. You will get additional cooling along the duct between the exhaust and the fan. Any fan rated to ~60oC should be fine. I would (personally) design for a Q that is 2x the flow of the largest engine.
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