Pete Attryde Posted January 11, 2007 Share Posted January 11, 2007 Looking into making a snorkel for the Discovery. I am intending to use plastic gutter downpipe from somewhere like B&Q as it's cheap, however my local B&Q only has downpipe that is 68mm OD which makes the ID somewhere around 65mm because of the wall thickness. I only intend to use a bit long enough to go up the windscreen pillar so about about 700mm long. My concern is that the diameter of the tube is to small and will prove to be restrictive and as it's a standard 300 TDi Auto the last thing I want to do is strangle the thing. So basically do you think that the tube diameter is to small and secondly is it possible to get larger diameter gutter downpipe? Cheers in advance, Pete. Quote Link to comment Share on other sites More sharing options...
dollythelw Posted January 11, 2007 Share Posted January 11, 2007 another use for the local boyracer exhaust shop, they gave me a 3" bore stainless offcut to do the same job for a couple of quid - not sure if you have one locally? Quote Link to comment Share on other sites More sharing options...
landrover598 Posted January 11, 2007 Share Posted January 11, 2007 The intake to the turbo on a 200tdi is only 2.5" (64mm) outside diameter, not sure about a 300. I had some hose delivered this morning for the snorkel i'm making. Quote Link to comment Share on other sites More sharing options...
freeagent Posted January 11, 2007 Share Posted January 11, 2007 the mantec steel disco snorkles have a small tube, not sure what size, but it was smaller than guttering down pipe... i used a snorkle made from downpipe on my old 300tdi defender with no problems.... Quote Link to comment Share on other sites More sharing options...
Corrode Finger Posted January 11, 2007 Share Posted January 11, 2007 I used the same black plastic drainpipe on my 3.9 rangey before converting it into a hybrid. It worked fine, it was copied from a fellow club members, also on here, V8bertha. I am going to do the same with the hybrid but i have now got hold of some aluminium downpipe, about 30foot of it in total, was left over from one of my building sites. This is also about 64mm internal diameter. Just make sure that all the joints where the pipes connect are properly sealed, i used guttering mastic, on the basis that it was designed to keep water in a gutter so it will also keep it out of a gutter. Quote Link to comment Share on other sites More sharing options...
Orgasmic Farmer Posted January 11, 2007 Share Posted January 11, 2007 When I made mine on the Disco I used 70mm dia pipe, a combination of marley underground pipe (bought in Germany!), some old aluminium downpipe off the house and a 70mm gates hose with a 90 degree bend and a couple of long striaghts. All came together well. I made the top out of tin sheet welded up a la mantec stylee.. I tried a mates Safari top on the pipe I have and it fitted perfectly so they seem, at the top at least, to be a similar diameter to mine. No drop in performance was noted! I have pics if you're intertested. Incidently, the hardest bit of the whoile job is cutting the complex hole in the wing... Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted January 11, 2007 Share Posted January 11, 2007 Dad used 2.5" drainpipe on the V8 with no ill effects (the flapper is more of a restriction than the snorkel anyway), the 109 (3.9) used 2.5" SS exhaust no problems. Dad got some flexible drainpipe sealant stuff from B&Q that never fully sets, means you can move it about a bit / remove to change air filter etc. without having to re-seal everything. Quote Link to comment Share on other sites More sharing options...
Turbocharger Posted January 11, 2007 Share Posted January 11, 2007 In the interests of science I did some of my rolling-road runs with and without a drainpipe snorkel on my 300Tdi. If there was a difference I couldn't tell - I had to check back to the file names to see which numbers came from which run. (Small print: figures based on three repeat runs on the same piece of road on the same day. No correspondence will be entered into, the judge's decision is final. This was a real scientific experiment using science. No animals were harmed in the production of this feature.) Quote Link to comment Share on other sites More sharing options...
Pete Attryde Posted January 12, 2007 Author Share Posted January 12, 2007 Cheers folks, Sounds as like i shall be taking a trip to B&Q at the weekend then. will try and take some piccies as I go and maybe do a write up. Orgasmic farmer pictures would be good. Cheers Pete. Quote Link to comment Share on other sites More sharing options...
siearl Posted January 12, 2007 Share Posted January 12, 2007 If anyone has a 3.9 V8 with snorkel please could you post the pics of how it is all connected to the engine etc as thinking about going down the homemade route myself Quote Link to comment Share on other sites More sharing options...
Orgasmic Farmer Posted January 12, 2007 Share Posted January 12, 2007 OK a few pics. Remember this is a work in proigress as shown and the final thing ended up a little different. The top was made at a later date too so thats not shown either. Hopefully gives an indication of what you can expect though. Good luck Mark Quote Link to comment Share on other sites More sharing options...
Pete Attryde Posted January 12, 2007 Author Share Posted January 12, 2007 Ta for the pictures. Pete. Quote Link to comment Share on other sites More sharing options...
siearl Posted January 12, 2007 Share Posted January 12, 2007 Just so i am getting this right the snorkel goes direct in to the air filter, or am i completey wrong Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted January 12, 2007 Share Posted January 12, 2007 Snorkel goes into the intake of the air filter, yes. Quote Link to comment Share on other sites More sharing options...
siearl Posted January 14, 2007 Share Posted January 14, 2007 so on the following, picture if i bore out a hole in the air filter housing i will then be able to route it and diy job it. or again am i wrong in thinking this Quote Link to comment Share on other sites More sharing options...
bmhor Posted January 14, 2007 Share Posted January 14, 2007 so on the following, picture if i bore out a hole in the air filter housing i will then be able to route it and diy job it. or again am i wrong in thinking this If you look at the end of the air filter ,the bit stuck in the back of the rad, there might be the remains of a trumpet. When I snorkled mine, I cut the flared bit of the trumpet off which left a lovely section of pipe for the snorkel flexi to connect to. The rest, as they say, was as easy as falling off a log into a deep river with alligators bightinbg your a$%e..... If I remember, I'll take post a photo tomorrow night. Bob Quote Link to comment Share on other sites More sharing options...
siearl Posted January 15, 2007 Share Posted January 15, 2007 Thanks Bob, Photos would be great failing that you may have the pleasure of direction on how to do it come july LOL Si Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted January 15, 2007 Share Posted January 15, 2007 On dad's RR he used two 90 degree elbows and a couple of really short lengths of pipe to come off the front of the trumpet (cut down a bit) and back. Looks a bit nicer than a whacking great big bit of flexi IMHO. Quote Link to comment Share on other sites More sharing options...
siearl Posted January 15, 2007 Share Posted January 15, 2007 well i am going to have to think how i am going to route it as not a lot of room under the bonnet, but if anyone has any pics of a RR with snorkel if they wouldnt mind posting pics Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted January 16, 2007 Share Posted January 16, 2007 Will try to nip over to dad's and take some tomorrow today. Quote Link to comment Share on other sites More sharing options...
TomG Posted January 31, 2007 Share Posted January 31, 2007 When I made mine on the Disco I used 70mm dia pipe, a combination of marley underground pipe (bought in Germany!), some old aluminium downpipe off the house and a 70mm gates hose with a 90 degree bend and a couple of long striaghts. All came together well. I made the top out of tin sheet welded up a la mantec stylee.. I tried a mates Safari top on the pipe I have and it fitted perfectly so they seem, at the top at least, to be a similar diameter to mine. No drop in performance was noted!I have pics if you're intertested. Incidently, the hardest bit of the whoile job is cutting the complex hole in the wing... Where abouts did you get the 70mm Gates hose from? I'm having trouble finding a distributor in the UK with this size. Plenty of 70mm silicone hose about but pretty expensive stuff. Quote Link to comment Share on other sites More sharing options...
Orange Posted January 31, 2007 Share Posted January 31, 2007 Another useful pipe supplier is Venair Direct link to the useful pipes is here Might help...I am certainly considering it! Quote Link to comment Share on other sites More sharing options...
Orgasmic Farmer Posted January 31, 2007 Share Posted January 31, 2007 Where abouts did you get the 70mm Gates hose from? I'm having trouble finding a distributor in the UK with this size. I just went to my local motor factors and asked for a 70mm dia gates hose with a 90 degree bend. they had one there by the next day. The pipe came with 30 cm straights on each side of the 90 degree bend so plenty to play with. Cost was 12£ + vat IIRC Quote Link to comment Share on other sites More sharing options...
Pete Attryde Posted April 27, 2007 Author Share Posted April 27, 2007 Just to bring this full circle I have now made and fitted a snorkel although I did not use drainpipe in the end. Having recently changed jobs I discovered some 80mm OD thin wall ally tube laying around. I asked around at work and found that it was part of the exhaust flue for the Micro-CHp units we are testing at the moment. A bit of further digging uncovered a 90 degree and a couple of 45 degree bends and slightly oddly some totally un-used samco hoses of the correct size that were about to be binned. All were liberated and then over the easter weekend I applied them all to the truck with the following results. Having driven the truck for a week I found that the original top was some what noisey with the windows or sunroof open so I made a second one. The good thing about this pipe being a flue for boilers is that the pipe and bends have a gas tight seal built in. the seal. I am reasonably happy that the system is water tight as I put a peice of card over the end of the pipe and the engine very rapidly stalled and I could not hear any air being drawn into the system. The Original airbox got replaced as at some point in the past someone had drilled a load of 1" holes in the front of it so sealing it up was going to be a pain in the arse, plus I now have easily got enough space for a second battery for when I get a winch. Pete Quote Link to comment Share on other sites More sharing options...
honitonhobbit Posted April 27, 2007 Share Posted April 27, 2007 I'm building one for the 100" at the moment. Got a 12 foot length of SS same dia as Southdown use - got it free - so I may have some spare I have to go from one side of the engine bay to the other to exit throught the top of the wing a'la Mantec V8 stylee so I have aquired some flexi hose to do that Got some SD clamps for the windscreen pillar Got a SH safari stylee intake Made a reducer to the air box 72m down to 64mm from B&Q for 98p Got some fleximastic that was left un attended on site Four SS Jubilee clips from the same scource Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.