View Full Version : 3" ventilation hose option

16-08-2009, 06:51 PM
http://www.overtons.com/modperl/product ... 006&r=view (http://www.overtons.com/modperl/product/details.cgi?pdesc=3_Ventilation_Hose_per_foot&i=23641&merchID=1006&r=view)


16-08-2009, 10:37 PM
Depending on the length of your run, it could get pretty spendy. I decided to just go with the white "dryer duct hose" from HomeDepot instead...they won't be exposed to direct sunlight and you could probably re-run the cheapo hose 3 times for the initial cost of that marine hose. or would you rather do it RIGHT the first time? :whistling:

16-08-2009, 10:59 PM
Overtons was never cheap, even when they first started up. BoatUS and other other suppliers probably have it for less, but a better option might be some smooth bore hose from a plumbing supplier - you won't lose flow due to the ribbing. Expensive, though: http://www.overstock.com/Auto-Parts/Wat ... oduct.html (http://www.overstock.com/Auto-Parts/Water-Pump-3-inch-20-foot-Suction-Hose/3587264/product.html)

17-08-2009, 07:36 AM
Flexy hose has always been expensive for some reason!

I ran rigid PVC tubes (as used in the UK for rainwater downpipes!) down the side pods with a range of associated 90 and 45 degree bends to get the flow from the engine bay and into the car, then used flexy for the final internal connections - works well, saves lots of flexy and having a smooth internal surface for much of the run ought to improves things from an 'internal friction' fluid dynamics point of view! :whistling:

17-08-2009, 10:13 AM
Wouldn't a fluted interrnal surface create some sort of "vortex" or cyclonic effect, therefore speeding up the air inside the pipe? :whistling: Like it really matters :)
I'll probably be using the same white flexy stuff from a DIY as nbb to attach to the mini heater and bring in fresh air from the front of the car. I'll also use this from the vent on the drivers side into the radiator by the back wheel, it'll all be well enclosed and hopefully there won't be too many stones flying in there at 70 mph.

18-08-2009, 05:24 PM
You'd produce a turbulent boundary layer..... which you would with the smooth tube too but less, and it would be nearer the inner surface. Don't think you'd create a vortex by using convoluted tube. BUT fluid dynamics is a bas***d, and the I wouldn't want to fight through the program that models it EVER AGAIN! :rofl:

11-09-2009, 02:21 AM
Just to add to the possibilities, Shop-Vac hoses come in 1.25" and 2.5" diameters in 8ft lengths. The 2.5 would be super easy to work with and adapt.

11-09-2009, 02:31 AM
you don't want to use them...they suck!


11-09-2009, 03:56 AM