Exhaust fumes venting

[kingfisher]

I was hoping to start up some cars in the garage without necessarily taking them out.

Anybody any experience of venting the exhaust fumes outside by means of flexible pipe leading from exhaust . If so where could I get a suitable length?
Thanks in anticipation

[mk1]

This may sound daft, but can't you just open the door?

If not, any bit of old pipe will do as long as you can get a good seal round the end.

[Nick W]

Ive just melted an expensive indusrial vac pipe doing that ,but I then used a cardboard tube for the first bit... lasted for about 1/2 an hour

[kingfisher]

This may sound daft, but can't you just open the door?

Yes, but I stay and sleep above this garage, and with the fumes rising I don't want all of us and the dogs, going belly up!

[mk1]

My Mrs & I used to sleep over the garage & I remember when I spent a week removing underseal from my 1st Mk1 racer by scrubbling it with thinners we both had some pretty weird dreams for a few nights, not to mention a permenant blinding headache.

M

[ianh1968]

I cut two 3" holes in my garage door and use a length of this:
http://www.carbuildersolutions.com/uk/s ... xible+pipe
Sizes 38mm - 63mm

These might also be of use:
http://www.carbuildersolutions.com/uk/s ... ed+adapter

I only required 1 metre as the cars are parked right up by the door.
For longer pipe-runs, "back-pressure" and "flow" might need to be
considered, perhaps even some kind of fan system...

Why do I have two holes in the door? Well, symetry is one reason
and the other is the fact that one car has a centre-exit and the
other has a side exit... Each hole has a round "soffit vent" cover
going in from the outside and these get removed when the hole is in
use. On the inside, each has a plywood flap to keep the draught
out when not in use.

This idea won't stop the stink that comes back out of the carb on
a "cammed" engine, and also bear in mind that an engine needs
to be able to breathe in, as well as out, so you'll still need some
fresh air going into the garage...

Ian

[casinogarage]

Some pics of my installation :



I've used PVC and flexible hose for ventilation diameter 80mm (100mm is also avalaible).
Without such equipment, even with barn's carriage entrance wide open, after a first trial (duration 15 minutes max) I endure 3 hours headache !

[kingfisher]

Thanks a million casinogarage; that's more or less exactly what I want to do.

If you don't mind me asking......where did you get the flexible pipe and the reducer? Additionally how are you sealing the reducer/car exhaust tailpipe connection? I might at times have to draw the exhaust fumes 5-10 meteres, are you managing without a fan assisting?

[casinogarage]

All components are avalaible in home improvement shop like B&Q, department vent or guttering. The reducer PVC is a reducer 80mm/40mm, manually rebored to 48mm (external diameter of my exhaust tailpipe) and sealed by a bit of bike tube (the tailpipe remains cold).
I've not managed fan assistance, the target is only to throw the fumes outdoor. The flexible (5m) leaves under the tiles simply to use an hole already existent !
Sorry for my halting english but I hope my explanations remains understandable.

[cheesebadger]

Important, my setup hasn't been used for exhaust gases, but I can't see why it wouldn't 'help' if you are intending for longer runs... (please take your own risks and tests)

In my shed I have an old marine bilge pump fan running out of a wall vent. The advantage of this setup is that it designed to vent flammable fumes from a bilge pump, which includes exhaust - which means hopefully it won't explode. Because it is marine it is also only 12V. New bilge pump fans are available from non specific online auction websites for approx £20, and are normally 4" diameter, so are very easy to attach to standard ducting from aforementioned diy stores (not sure how they would manage with high exhaust temps though).

[Exminiman]

This may sound daft, but can't you just open the door?

Yes, but I stay and sleep above this garage, and with the fumes rising I don't want all of us and the dogs, going belly up!

Dont mean to lecture, please make sure you get some good CO alarms and position as per instructions in living area, especially, if you are sleeping above.
You will never know if you have a build up of CO .........until its too late