Alex Wong1697456877 Posted March 19, 2001 Author Share Posted March 19, 2001 I think I've found a solution that costs 80 quid. I bought a standard cylindrical tank from QED. On my chassis (97), between the two footwells, where the heater used to sit, above the gearbox is a perfect place for the tank. I've cut a circular hole into this area which the tank drops into. I'm going to get a flange welded onto the tank to screw it into the ally and make it look tidy and keep it about 4cm away from the gearbox. I just hope the pump can pump the oil to it (I'm assuming it will) I don't think this works for all chassis' though. Alex Link to comment Share on other sites More sharing options...
EFA Posted March 19, 2001 Share Posted March 19, 2001 Alex, Be acareful to get the crasnkcase breathing right - remember the breather from the cam cover should not go to the top chamber in the tank. The top chamber in the tank should have a hose to the catch tank. The scav rtn should go to the same chamber as the breather from the cam cover. Do this and you'll never have to empty your catch tank again...... Whatever you do, do not run it sealed - you'll airiate the oil. Arnie Webb The Fat Bloke blush.gif in a not so Slow Vauxhall wink.gif Link to comment Share on other sites More sharing options...
Alex Wong1697456877 Posted March 20, 2001 Author Share Posted March 20, 2001 Arnie, I've plumbed the breather from the tank and from the cam cover independantly to one catch bottle. Not quite what you describe, but that should be ok shouldn't it? My tank only has 3 attachments - the breather, oil in and oil out. At least this way, it shouldn't aerate the oil. Alex Edited by - Alex Wong on 20 Mar 2001 00:45:42 Link to comment Share on other sites More sharing options...
EFA Posted March 20, 2001 Share Posted March 20, 2001 Alex, If you have the large breather pipe between the block and head (below exhaust port 4)you'll probably be OK. If this has been blanked (I assume you also therefore removed the tin plate inside the cam cover) the crank breathes at high velocity into the cam chambers and out into the catch tank. Regretably this takes the oil with it at high rpm. Sorry! Worst case you need add another breather inlet into the tank. Arnie Webb The Fat Bloke blush.gif in a not so Slow Vauxhall wink.gif Link to comment Share on other sites More sharing options...
stevefoster Posted March 20, 2001 Share Posted March 20, 2001 I second the fact that no one complained of cooked feet in my dry sumped RK XF. The tank was bolted to the pass foot well. If / when I upgrade to a dry sump I would go for the stepped one. Sounds like a smart compromise. It is the height of oil needed not necessarily a round pot. /Steve Link to comment Share on other sites More sharing options...
Alex Wong1697456877 Posted March 20, 2001 Author Share Posted March 20, 2001 Thanks Arnie, It is blanked (crank breather) When I get the flange welded on, I'll have a inlet for the cam cover breather to the same chamber as the Scavange inlet. Can you confirm that this is what you suggested? I'm easily confused. Alex Link to comment Share on other sites More sharing options...
Alex Wong1697456877 Posted March 20, 2001 Author Share Posted March 20, 2001 I would have gone for the Brise stepped one but it's 4 times the price and is too close to the exhaust for my liking. They were also too busy to build one at this time. Aled Link to comment Share on other sites More sharing options...
Nick M Posted March 20, 2001 Share Posted March 20, 2001 Arnie, why would running the engine sealed cause the oil to become airated more easily ?? I'm curious as I'd pretty much decided to go down this route, largely because it makes the plumbing neater, i.e. less breather hoses to contend with. Link to comment Share on other sites More sharing options...
Mike Bees Posted March 20, 2001 Share Posted March 20, 2001 All the dry-sumped Ks run sealed, and I'm told that most of the Touring Car engines do too. Mike Link to comment Share on other sites More sharing options...
EFA Posted March 20, 2001 Share Posted March 20, 2001 Nick, Sealed is a risk because the system can then pressurise on the tank side of the pump. Alex, Correct. Conceptually the outlet to the catch tank should have a baffle between it and the main chamber, and the breather shoudl eb into the main chamber. If the main chamber is split into two sections to reduce "sloshing" this is no problem. Arnie Webb The Fat Bloke blush.gif in a not so Slow Vauxhall wink.gif Link to comment Share on other sites More sharing options...
Nick M Posted March 20, 2001 Share Posted March 20, 2001 OK, so by that do you mean that the scavenge pump returns oil to the tank under pressure (pressurising the tank) and the feed pump is then having to do less work dragging oil out of the tank, with the result that the oil ends up being airated because it hasn't had enough time to settle ?? The dry sump tank I have does have a breather (which goes to the catch tank) but there won't be any on the engine. Link to comment Share on other sites More sharing options...
EFA Posted March 20, 2001 Share Posted March 20, 2001 Then thats not a sealed system. Arnie Webb The Fat Bloke blush.gif in a not so Slow Vauxhall wink.gif Link to comment Share on other sites More sharing options...
Nick M Posted March 20, 2001 Share Posted March 20, 2001 That's OK then !! smile.gif I guess it's my misunderstanding between what constitutes a totally sealed system and one where the engine runs in a vacuum (which is what mine should be doing). Nick Link to comment Share on other sites More sharing options...
Mike Bees Posted March 20, 2001 Share Posted March 20, 2001 Ah, my misunderstanding too Nick. I considered 'sealed' to mean that the engine was sealed. You do get a constant oil mist out of the dry sump tank breather with this system, even with it routed to a catch tank. Mike Link to comment Share on other sites More sharing options...
Jason Plato Posted March 20, 2001 Share Posted March 20, 2001 Thats right Mike , and if you take the cam cover oil filler cap off imediatly after running the K series you will hear a hissing sound as the vacuum is lost . What about the possibility of running an in line remote oil swirl pot prior to return to the K bell housing to overcome possibele airation and to avoid shelling out loads £££ on original caterham kit , maybe something like the 1 litre tank in Demon Theives mag ??? Dave Link to comment Share on other sites More sharing options...
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