mrgee2jz Posted November 23, 2010 Author Share Posted November 23, 2010 Just run the two hoses straight into a catch can, but make SURE the catch can also has free ventilation to atmosphere to at least match the area of the openings of the two breather hoses. Here's my set up on my Skyline, -12 hoeses though. I am not into bling, or spending money needlessly, so it may not be to everyone's taste but works fine and cost nothing. thats what my diesel was running like with a blown engine, it used to loose a few litres and id just poor it back in again at the end of the jorney if i find some pics ill post them Quote Link to comment Share on other sites More sharing options...
Hoppy Posted November 23, 2010 Share Posted November 23, 2010 I've basically done the same as you Chris. 2 x AN12 lines from the cam covers to a catch can, which is fitted with a 3" K+N breather filter. No lines running back to the engine or intake. I'll stick some better pics up of my setup tomorrow. Quote Link to comment Share on other sites More sharing options...
mrgee2jz Posted November 23, 2010 Author Share Posted November 23, 2010 (edited) lookie lookie. this blew out the crank seals in the end, pissed out all its remaining oil over the floor, then blew the turbocharger and sounded like a true cement mixer Edited November 23, 2010 by mrgee2jz (see edit history) Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted November 23, 2010 Share Posted November 23, 2010 Great minds and all that.... I don't mind £1800 for a crankshaft, but I'm damned if I am funding some fabricators next holiday with a bespoke *iss pot for the vent lines Quote Link to comment Share on other sites More sharing options...
Swampy442 Posted November 23, 2010 Share Posted November 23, 2010 Great minds and all that.... I don't mind £1800 for a crankshaft, but I'm damned if I am funding some fabricators next holiday with a bespoke *iss pot for the vent lines Thats a sig for someone right there Quote Link to comment Share on other sites More sharing options...
Digsy Posted November 23, 2010 Share Posted November 23, 2010 The thing that doesn't sit right with me about all this high crankcase depression malarky is that if it gave real world efficiency improvments the OEMS wouls be all over it like a cheap suit. Considering gubbins we throw at engines these days just to get a few extra hp without burning any more fuel, adding a vacuum pump has got to be one of the simplest mods you could wish for. Many downsized turbo engines actually have a vacuum pump of some sort these days already, anyway. I bet if it was worth the extra performance, but the parasitic loss of the pump was too great, a productionable version of the exhaust downpipe scavenge pump would have been commonplace by now. Quote Link to comment Share on other sites More sharing options...
mrgee2jz Posted November 23, 2010 Author Share Posted November 23, 2010 The thing that doesn't sit right with me about all this high crankcase depression malarky is that if it gave real world efficiency improvments the OEMS wouls be all over it like a cheap suit. Considering gubbins we throw at engines these days just to get a few extra hp without burning any more fuel, adding a vacuum pump has got to be one of the simplest mods you could wish for. Many downsized turbo engines actually have a vacuum pump of some sort these days already, anyway. I bet if it was worth the extra performance, but the parasitic loss of the pump was too great, a productionable version of the exhaust downpipe scavenge pump would have been commonplace by now. Maybe its got something to do with the decreasing the life of the engine, i read somewhere that if you have vacuum in the crankcase it also pulls oil from the bearings and the big ends start prematurely wearing... Quote Link to comment Share on other sites More sharing options...
jevansio Posted November 23, 2010 Share Posted November 23, 2010 The thing that doesn't sit right with me about all this high crankcase depression malarky is that if it gave real world efficiency improvments the OEMS wouls be all over it like a cheap suit. Considering gubbins we throw at engines these days just to get a few extra hp without burning any more fuel, adding a vacuum pump has got to be one of the simplest mods you could wish for. Many downsized turbo engines actually have a vacuum pump of some sort these days already, anyway. I bet if it was worth the extra performance, but the parasitic loss of the pump was too great, a productionable version of the exhaust downpipe scavenge pump would have been commonplace by now. I'm right behind you, I only went down the investigation route to prove it for myself, Quote Link to comment Share on other sites More sharing options...
Hoppy Posted November 23, 2010 Share Posted November 23, 2010 Great minds and all that.... I don't mind £1800 for a crankshaft, but I'm damned if I am funding some fabricators next holiday with a bespoke *iss pot for the vent lines That is pretty funny, fair play Quote Link to comment Share on other sites More sharing options...
Digsy Posted November 23, 2010 Share Posted November 23, 2010 Maybe its got something to do with the decreasing the life of the engine, i read somewhere that if you have vacuum in the crankcase it also pulls oil from the bearings and the big ends start prematurely wearing... That could be engineered out, I'm sure. In fact if you are pumping from a vacuum back to a vacuum I'm not sure if the pump would have to work any harder at all. Have to think about that a bit...! I'm right behind you, I only went down the investigation route to prove it for myself, What system did you end up with? Quote Link to comment Share on other sites More sharing options...
hodge Posted November 23, 2010 Share Posted November 23, 2010 Great minds and all that.... I don't mind £1800 for a crankshaft, but I'm damned if I am funding some fabricators next holiday with a bespoke *iss pot for the vent lines Hahaha mint. Quote Link to comment Share on other sites More sharing options...
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