Is it worth having an engine breather from the mech. fuel pump plate?? Obveously for this you need to be running an electric fuel pump.
I have just fitted a catch can and have my breather from tappet cover running to it but have seen pics of people using one out of this plate also.
Whats your thoughts..
Breather from fuel pump plate
Started by
_wjr2980_
, Jul 18 2010 09:09 PM
8 replies to this topic
#2
Litre8
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Posted 18 July 2010 - 09:13 PM
You may see a lot of oil making the journey up the breather pipe/hose under heavy braking and/or left hand cornering........
#3
TerrA LX
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Posted 18 July 2010 - 09:28 PM
I think the fuel plate may be the return from the catch can.
I don't like the return myself but for anything other than short sprints, such as endurance races, it is a must.
I don't like the return myself but for anything other than short sprints, such as endurance races, it is a must.
#4
ilovea9x
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Posted 21 July 2010 - 02:08 AM
The point of the having the hose from the fuel block off plate is to get rid of crank case presure, allowing the oil to get back to the sump quicker.
Seen alot of people do this for this reason.
Seen alot of people do this for this reason.
#5
Litre8
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Posted 21 July 2010 - 08:48 AM
If the purpose is to get rid of crank case pressure and allow oil return then I see a potential conflict...
#6
View GaragePosted 21 July 2010 - 10:37 PM
^ Allow oil return from the heads through the usual drain holes - the theory is that using a breather with some sort of snorkel at the fuel pump hole doesn't try to suck the oil up into the heads like the breathers on the rocker covers (supposedly) do. I'm curious as to the effectiveness, never tried it.
#7
_uglybob_
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Posted 21 July 2010 - 11:02 PM
i use this set up
havent really looked into it that much yet but that catch can fills faster than im sure it should. Keeping in mind that rocker cover has no baffeling at the moment i would think thats where a majority of it would come from. its a long way for oil to make it up that hose and into that tank..
havent really looked into it that much yet but that catch can fills faster than im sure it should. Keeping in mind that rocker cover has no baffeling at the moment i would think thats where a majority of it would come from. its a long way for oil to make it up that hose and into that tank..
#8
turbotrana
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Posted 22 July 2010 - 04:46 AM
I have my breather setup coming off the lifter cover plate and caught oil draining back thru a fitting on the fuel pump cover plate.
I still have the PCV setup as per factory. Too many remove this as they dont fully understand how both sides of the PCV system work. People must understand that there is a side that works under idle cruise and a side that works under accelleration
I still have the PCV setup as per factory. Too many remove this as they dont fully understand how both sides of the PCV system work. People must understand that there is a side that works under idle cruise and a side that works under accelleration
#9
_Squarepants_
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Posted 22 July 2010 - 09:59 PM
Having a breather on the fuel pump cover or lifter cover allows crank case ventilation without the oil draining back through the small drain holes in the head hindering it, as it would do if the breathers are only in the rocker cover.
Having your drain back in these positions is near next to useless as you're getting crankcase pressure blowing back up this hose pushing oil back into the catch can. It will only drain back when the engine is off. To successfully drain back oil from the catch can you need to run it to the sump below the oil level, but then you also get all the condensate water going in with it. Best idea IMO is to have a ball valve on the bottom of the can and empty it every now and again to waste.
Yes, a PCV is a good thing, but if you're venting all your breathers to atmo, then you don't need it. It only really works as per design if you have it plumbed back into your manifold.
Having your drain back in these positions is near next to useless as you're getting crankcase pressure blowing back up this hose pushing oil back into the catch can. It will only drain back when the engine is off. To successfully drain back oil from the catch can you need to run it to the sump below the oil level, but then you also get all the condensate water going in with it. Best idea IMO is to have a ball valve on the bottom of the can and empty it every now and again to waste.
Yes, a PCV is a good thing, but if you're venting all your breathers to atmo, then you don't need it. It only really works as per design if you have it plumbed back into your manifold.
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