3" to 2" any bright ideas?

Post by **Merlin** » Mon Apr 07, 2014 12:31 pm

I need to figure a way of getting a 3" exit of a 12V in line blower to connect to a 2" duct flange. Any bright ideas how this can be done cheaply and lightweight?

This

To this

With some of this

Post by **Merlin** » Mon Apr 07, 2014 12:35 pm

Or just ram the 3" ducting on the 2" flange and jubilee clamp it?

106pete · Post by **106pete** » Mon Apr 07, 2014 12:44 pm

I think drain pipes have similar size and reducers, maybe look at them?

Post by **indigolemon** » Mon Apr 07, 2014 12:52 pm

Look at pipework for air intakes, stuff like:

http://www.ebay.co.uk/itm/Car-Intercool ... 2a2c65b3f9

Post by **NafemanNathan** » Mon Apr 07, 2014 1:01 pm

Yeah I was going to just suggest a 3" to 2" silcone reducer as well...

http://www.ebay.co.uk/sch/Vehicle-Parts ... er&_sop=15

YouTube · Post by **Sailor** » Mon Apr 07, 2014 1:01 pm

Something like this?
http://www.ebay.co.uk/itm/Silicone-Hose ... 2335ced1e0

Or one of these plus a short straight pipe into the flexi?
http://www.thefind.com/garden/info-pvc-reducer-coupling

Is it the sort of thing pond suppliers might stock?
(They don't have to know you're trying to build a cheap turbo ...

)

Post by **Merlin** » Mon Apr 07, 2014 3:36 pm

I don't think the silicone reducers are any good as they wont be strong enough to grip to the ducting and support a jubilee clip.

Sailor wrote:Or one of these plus a short straight pipe into the flexi?
http://www.thefind.com/garden/info-pvc-reducer-coupling

Some of those look good though if I could get them in the size I need, and in the UK.

Post by **RattyMcClelland** » Mon Apr 07, 2014 3:42 pm

This for your electronic supercharger?

Post by **NafemanNathan** » Mon Apr 07, 2014 3:43 pm

Merlin wrote:I don't think the silicone reducers are any good as they wont be strong enough to grip to the ducting and support a jubilee clip.

You'd be surprised. Unless you seriously crank the jubilee clip up tight, it won't collapse on itself. It will remain round unless you squash the jubilee clip. Otherwise you could source a 2cm length or so of aluminium tube of the right diameter and use that as a reinforcement.

Post by **rob quilter** » Mon Apr 07, 2014 4:34 pm

I'd go for the silicone reducer to be honest.