StevoD Posted March 18, 2018 Share Posted March 18, 2018 Hey everybody, Been trying to get y head around a LMT intake kit i got about 2 years ago today. end up talking to the founder of LMT who recommended i do a PCV delete. Just curious what all you Zedders have done for a PCV delete Quote Link to comment Share on other sites More sharing options...
Erni902 Posted March 18, 2018 Share Posted March 18, 2018 Got a custom PCV delete fitting from Project Import in the US. Then hooked my PCV system up to a catch can with a breather filter so it vents to atmosphere. If you want me to take some pics I will mate so you can get the idea. Quote Link to comment Share on other sites More sharing options...
StevoD Posted March 19, 2018 Author Share Posted March 19, 2018 That be really handy actually Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted March 20, 2018 Share Posted March 20, 2018 (edited) The PCV system on the Z like many cars is in two stages, the first idle and low load consists of a hose from the drivers side cam cover to the plenum with a non-return valve, and since the VQ motor breathes quite a lot of oil vapor at idle and low load due to high intake vacuum, which results in oil pooling in the lower part of the plenum, this is the one to add a catch can to, but it must be a sealed unit otherwise any air leaks will cause un metered air to be drawn into the engine and weaken the mixture, The second part is on the passenger side cam cover, which is the high load side and is not subject to high vacuum, and a hose runs from the cam cover to a point on the plastic intake which is often removed when a pop-charger or different intake pipe is fitted, this is only under suction when there is enough velocity in the intake to put t under vacuum, so the pipe can just be reconnected to keep a mild vacuum on the crankcase if you want to utilise this, or run to an open catch can or even just air a filter to avoid minimal oil mist. Edited to correct my **** up. Edited March 20, 2018 by Tricky-Ricky 1 Quote Link to comment Share on other sites More sharing options...
StevoD Posted March 20, 2018 Author Share Posted March 20, 2018 Isn't the passenger side the side that goes to the intake pipe? Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted March 20, 2018 Share Posted March 20, 2018 (edited) 7 hours ago, StevoD said: Isn't the passenger side the side that goes to the intake pipe? Yes it is, my mistake, i will go back and edit my previous post. Edited March 20, 2018 by Tricky-Ricky Quote Link to comment Share on other sites More sharing options...
nissanman312 Posted March 20, 2018 Share Posted March 20, 2018 10 minutes ago, Tricky-Ricky said: No the passenger side cam cover part of the PCV goes to the plenum via a one-way valve, and is the one that needs a catch can. What about when boosted dose this differ ? Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted March 20, 2018 Share Posted March 20, 2018 (edited) 14 minutes ago, nissanman312 said: What about when boosted dose this differ ? No, as the one-way valve will prevent any positive pressure going back into the crankcase, but it may be prudent to replace said valve just in case it's a bit weak, and obviously, the high load side breather needs blocking or relocating for the same reason otherwise you would be pressurising the crankcase. Edited March 20, 2018 by Tricky-Ricky Quote Link to comment Share on other sites More sharing options...
davey_83 Posted March 20, 2018 Share Posted March 20, 2018 1 hour ago, Tricky-Ricky said: No the passenger side cam cover part of the PCV goes to the plenum via a one-way valve, and is the one that needs a catch can. Other way round, drivers side cam cover goes to the plenum - passenger side goes to the intake post maf. Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted March 20, 2018 Share Posted March 20, 2018 7 hours ago, StevoD said: Isn't the passenger side the side that goes to the intake pipe? 3 hours ago, davey_83 said: Other way round, drivers side cam cover goes to the plenum - passenger side goes to the intake post maf. My apologies fellas, not thinking straight, was thinking LHD which i was driving a couple of weeks ago, i will go back and amend my previous post so as not to confuse further. 1 Quote Link to comment Share on other sites More sharing options...
davey_83 Posted March 20, 2018 Share Posted March 20, 2018 You always want the PCV system to be enclosed and not vented to atmosphere as said, you want the vacuum to help draw out the waste oil vapour and reduce crankcase pressure. Quote Link to comment Share on other sites More sharing options...
.:Bullen:. Posted March 20, 2018 Share Posted March 20, 2018 I’m now about to fit a enclosed oil catch can & im turbo boosted. currently my set up is pcv drilled out & vented to atmosphere with a filter. Then front plenum pipe blocked off. Rear breather plugged into oil catch can & tube from oil catch can to in front turbo intake to pull slight vacuum. This or a better way to run the system ? Quote Link to comment Share on other sites More sharing options...
The Chubby Ninja Posted March 20, 2018 Share Posted March 20, 2018 13 minutes ago, .:Bullen:. said: I’m now about to fit a enclosed oil catch can & im turbo boosted. currently my set up is pcv drilled out & vented to atmosphere with a filter. Then front plenum pipe blocked off. Rear breather plugged into oil catch can & tube from oil catch can to in front turbo intake to pull slight vacuum. This or a better way to run the system ? That's perfect. Pretty much the same setup I'm running but I don't have the pipe to the intake anymore it's just vented to atmosphere. You don't need a slight vacuum with the pcv valve drilled out as any positive pressure in the crankcase will vent on its own as the pressure outside will be less than the crankcase Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted March 20, 2018 Share Posted March 20, 2018 Actually it is beneficial to keep a vacuum from the intake whether N/A or bosted, as it helps ring seal and helps prevent oil seal weep, the PVC system is no solely an emissions tool as most seem to believe, some engine types do produce some small amount of positive pressure due to the receptive movement, so expelling this and creating a small amount of vacuum on those that don't is a good thing. Eliminating the oil mist with a baffeled can is good but keeping the lot attached to a vacumsource is also good, nothing wrong with eliminating the low side of the PCV especially when going boosted, allthough not nessacery, but at least keep one side subject to vacume. Quote Link to comment Share on other sites More sharing options...
Kieran O'Quick Posted March 22, 2018 Share Posted March 22, 2018 Does the tube on the intake side have to be on the intake or can it just breathe from anywhere? Can't get my head round it. Trying to run the big fat tube to the air filter is causing problems. Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted March 23, 2018 Share Posted March 23, 2018 10 hours ago, Kieran O'Quick said: Does the tube on the intake side have to be on the intake or can it just breathe from anywhere? Can't get my head round it. Trying to run the big fat tube to the air filter is causing problems. I would advise having a vacuum source on the full throttle/high load side simply because it aids ring seal at high load, but its not going to do any harm if you vent to atmosphere, preferably by way of a catch can, but some use just a filter, however, I would advise caution doing this as you may fall foul of the new MOT laws that state any oil leaks/weeps will be an instant failure. Quote Link to comment Share on other sites More sharing options...
Kieran O'Quick Posted March 23, 2018 Share Posted March 23, 2018 Ok, thanks Ricky. I'll plumb it to the intake. Quote Link to comment Share on other sites More sharing options...
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