Kev T Posted August 6, 2012 Share Posted August 6, 2012 I feel that once an engine is FI'd oil catch tanks become more important to prevent the extra crankcase pressure forcing more oil mist into the air intake tract, so today i fitted these : They were quite reasonably priced at about £60 and the braided hose cost £30, i tried ordinary silicon hose but the vacuum is so great it squeezed the hose flat ! They are nice and compact fit in well with the brushed alloy intakes and there is a little button on the bottom of glass bowl to drain so they don't need removing to empty. Quote Link to comment Share on other sites More sharing options...
Ebized Posted August 6, 2012 Share Posted August 6, 2012 I thought I saw those fitted on Saturday (without the hoses) and was going to ask but then I think my eyes got distracted by the hundred and one other things under your bonnet Quote Link to comment Share on other sites More sharing options...
Mark@Abbey m/s Posted August 6, 2012 Share Posted August 6, 2012 does it still idle correctly Kev? Quote Link to comment Share on other sites More sharing options...
Kev T Posted August 6, 2012 Author Share Posted August 6, 2012 Hi Mark, yes still ticks over quite nice and steady at 8/900 rpm and no apparent hunting when hot. Quote Link to comment Share on other sites More sharing options...
Watshot Posted August 6, 2012 Share Posted August 6, 2012 Surely the braiding is designed to stop the hose expanding not collapsing? Quote Link to comment Share on other sites More sharing options...
Kev T Posted August 6, 2012 Author Share Posted August 6, 2012 Correct, but the internal tubing is far thicker and more robust than the previous silicon tube which just collapsed, tbf maybe more expensive silicon tubing might have been ok, but i wasn't willing to pay to take the chance ( particularly as the first stuff i tried was sold as vacuum tube ) plus in hindsight i think the braided tube matches my engine bay and the braiding allows for neater bends. Quote Link to comment Share on other sites More sharing options...
Watshot Posted August 6, 2012 Share Posted August 6, 2012 Fair enough, does look good. Quote Link to comment Share on other sites More sharing options...
Kev T Posted August 20, 2012 Author Share Posted August 20, 2012 This is the amount of oil trapped after about 400 miles, so definitely doing the job. Quote Link to comment Share on other sites More sharing options...
evilscorp Posted August 20, 2012 Share Posted August 20, 2012 have u got a link to the site? these look like they work better than others ive seen. Quote Link to comment Share on other sites More sharing options...
Kev T Posted August 20, 2012 Author Share Posted August 20, 2012 E bay item : small oil catch tank / can Nissan Skyline 200sx Silvia R32 R33 R34 350z 370z sold by rutlandmotors Quote Link to comment Share on other sites More sharing options...
evilscorp Posted August 20, 2012 Share Posted August 20, 2012 Thanks Quote Link to comment Share on other sites More sharing options...
4RE Leather Posted August 20, 2012 Share Posted August 20, 2012 Engine bling yippee:) Quote Link to comment Share on other sites More sharing options...
taffyjason Posted August 20, 2012 Share Posted August 20, 2012 Im an engine noob (as you well know) but how does the oil make its way into the intake? Quote Link to comment Share on other sites More sharing options...
4RE Leather Posted August 20, 2012 Share Posted August 20, 2012 Im an engine noob (as you well know) but how does the oil make its way into the intake? +1 Quote Link to comment Share on other sites More sharing options...
taffyjason Posted August 20, 2012 Share Posted August 20, 2012 +1 im a noob or +1 you want to know? lol Quote Link to comment Share on other sites More sharing options...
Darren-B Posted August 20, 2012 Share Posted August 20, 2012 Had mine on since May, does a great job, not a hint of oil in the return line when I put the \Cosworth plenum the other week Quote Link to comment Share on other sites More sharing options...
4RE Leather Posted August 20, 2012 Share Posted August 20, 2012 +1 im a noob or +1 you want to know? lol um what's oil lol? I want the answer to both questions as although I have heard of a catch tank I have been waiting for someone else to pop the question. I really have not got a clue as to what it does? Kev must have found some extra centimetres under his hood to fit them, as I am space less ! Quote Link to comment Share on other sites More sharing options...
Darren-B Posted August 20, 2012 Share Posted August 20, 2012 There is a breather pipe that connects from the rocker covers to the inlet manifold. the vacuum made from the engine pulls oil vapour from the rocker covers into the inlet manifold. It then makes it`s way into the combustion chamber where it is burn`t off. When running FI you can quite often see a slight increase in crankcase pressure resulting in more oil vapour being pulled into the inlet manifold. A catch can does what it says on the box, it catches the oil exactly the same way a water separator does & stops the oil being sucked into your inlet manifold, keeping it nice & clean Quote Link to comment Share on other sites More sharing options...
evilscorp Posted August 20, 2012 Share Posted August 20, 2012 Darren-B do you have two catch tanks? just asking as i would have thought you could get away with one (attached to the intake pipe on de engines) but your picture shows the cross-over pipe between the two rocker covers? (just being safe are you ) Quote Link to comment Share on other sites More sharing options...
4RE Leather Posted August 21, 2012 Share Posted August 21, 2012 There is a breather pipe that connects from the rocker covers to the inlet manifold. the vacuum made from the engine pulls oil vapour from the rocker covers into the inlet manifold. It then makes it`s way into the combustion chamber where it is burn`t off. When running FI you can quite often see a slight increase in crankcase pressure resulting in more oil vapour being pulled into the inlet manifold. A catch can does what it says on the box, it catches the oil exactly the same way a water separator does & stops the oil being sucked into your inlet manifold, keeping it nice & clean Why thank you kind Sir:) Quote Link to comment Share on other sites More sharing options...
taffyjason Posted August 21, 2012 Share Posted August 21, 2012 Im a little less Noob now, thankyou Quote Link to comment Share on other sites More sharing options...
Darren-B Posted August 21, 2012 Share Posted August 21, 2012 Darren-B do you have two catch tanks? just asking as i would have thought you could get away with one (attached to the intake pipe on de engines) but your picture shows the cross-over pipe between the two rocker covers? (just being safe are you ) Only 1, there is a hose between the 2 rocker covers, then I have fitted the catch can on the outlet on the drivers side rocker cover between the rocker cover & the plenum. The other outlet on the rear of the passenger side rocker is fitted with a mini k&N filter Quote Link to comment Share on other sites More sharing options...
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