Ok so just recently my car started to boost spike when it is first started. after the car warms up in about 5-10 minutes it goes back down to the 6-7 range and thats it. im hitting all the way up to 13psi and i can REALLY tell by feeling it and the sound of the BOV which sounds BAD ASS at 13psi. All my gauges and everything are normal. but i know it is spraying oil out the breather. but i plan to do a catch can. Also i have a Turbonetics Evolution Wastegate with the 9 psi spring. this has never happened before and its been on the car for about 3-4 months. so i cant explain what the hell is going on.
so what i have checked so far....
i checked the vac line from the pipe to the wastegate and it is fine, no holes or anything. its a little brown from the heat but its ok.
someone suggested the diaphragm is torn in the wastegate, can anyone describe this to me please?
so i dont like it doing it but i want to fix it. it sounds sweet but im nervous that its going to let something go at one point and not be too happy about it. so if anyone has any solutions or anything else to try i would appreciate it. also if im gettin some "soot" colored stuff on my BOV like it was coming out of the BOV what would that be? oil blow by? or what?
thanks for the help.
Hmm.. The only thing I know is that you should not have any soot, or anything that far up by your BOV.. Your probably shootin oil into your engine(as im sure you may know)
Wish I could help on your other problems tho..
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yeah im not too sure on all that tho, 13psi is fine for your motor..for the amount of time its at 13psi i wouldnt worry
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i disagree. If it has enough pressure to blow oil easily through the PCV then its probally on the dangerous side. At that point you are losing compression anyway because of the leak by the rings. Regardless of what people say, if its releasing pressure into the crankcase its too much.
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yeah i know im getting too much pressure because it puts oil all over my valve cover so i know i need a catch can, i just want to fix the high boost part.
Vincent Morris wrote:yeah i know im getting too much pressure because it puts oil all over my valve cover so i know i need a catch can, i just want to fix the high boost part.
The point is just adding a catch can isn't gonna help @!#$, just make it cleaner. You have a serious problem if your pushing out oil. PERIOD. Crankcase pressure = BAD. Solve the boost issue but look into the cause of the blow-by at the same time.
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The cause is most likely excessive compression in the cylinders. Since basically what all turbos and superchargers do is increase the air by jaming it into the cylinder by compression. Then your pistons are compressing the compressed air even more. The reason you are getting so much oil comming from the PCV is because the rings are not witholding to the added cylinder pressure.
All normal good working engines have blow-by. Even from the factory brand new it does. If not, they wouldnt add the PCV system in the first place.
I dont know if it just has extra blowby because of your higher boost level, or if the rings have already deteriorated down to a level that it is allowing excess to pass.
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start buying rebuild parts man, damn ecotecs and their rings.
If the diaphragm was torn in the WG you would not have any boost control at all.
Oil in the charge pipes (and subsequently out the BOV) is pretty normal for a turbo car...its when it is excessive that it becomes a problem and typically the compressor seals are to blame.
I would check the BOV as well...at high vacuum (High RPM snapping throttle plate closed) if the BOV is not reacting fast enough (hKS SSQV's are HORRIBLE at this) it will pull oil past the oil seals on the compressor side.
Im not sure how the PCV works on the Eco's but if there is any sort of air/oil seperator that probably should be checked. Breathers are bad. prevents the PCV from properly ventilating the crankcase. Vac lines should be always used to keep it running properly.
Blowby is probably NOT the issue. Pull the dipstick while its running...see how much pressure you can feel as each cyl fires. IF nothing else a stock NA motor should have a smaller ring gap than a boosted motor anyway so I dont see excessive charge leak past the rings as a big problem for the pcv.
Buildin' n' Boostin for 08' - Alex Richards
the compressor oil seals leaking is also a sign of too much oil as well...possibility of needing some sort of restrictor to reduce the flow.
Buildin' n' Boostin for 08' - Alex Richards
Excessive cylinder pressures can cause the pressure to excape through the rings. If you have bad rings, it can do the same thing. Like I said this happens on a stock car.. so just imagine that you are shoving 2x much air into the same spot the pressures are going to be more.
Thats where the whole oil catch can idea originally came from, because of the extra pressures it was shooting oil through PCV systems. Because of the likelyness of the turbo causing excessive blowby, you run it into the catch can to keep things looking "pretty" and so you dont blow all the oil into your intake on stock cars.
Blowby is bad. It will cause premature leaks in oil seals because of the pressure (pcv - positive crankcase ventilation), and premature oil failure because of combustion artifacts. Even if you dont notice it, the turbo is causing more pressure to leak past the rings. If its so much pressure to the point that its blowing oil out, you need to turn down the boost if its not too late, or do a re-ring ad honing.
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CheesyPackerFan wrote:Excessive cylinder pressures can cause the pressure to excape through the rings. If you have bad rings, it can do the same thing. Like I said this happens on a stock car.. so just imagine that you are shoving 2x much air into the same spot the pressures are going to be more.
Thats where the whole oil catch can idea originally came from, because of the extra pressures it was shooting oil through PCV systems. Because of the likelyness of the turbo causing excessive blowby, you run it into the catch can to keep things looking "pretty" and so you dont blow all the oil into your intake on stock cars.
Blowby is bad. It will cause premature leaks in oil seals because of the pressure (pcv - positive crankcase ventilation), and premature oil failure because of combustion artifacts. Even if you dont notice it, the turbo is causing more pressure to leak past the rings. If its so much pressure to the point that its blowing oil out, you need to turn down the boost if its not too late, or do a re-ring ad honing.
This would cause problems with the cold start issue of excessive oil out the pcv system... NOT under boost when warm. You should'nt be boosting the motor cold anyway...
Boost does not do anything to raise the compression ratio, it simply raises the charge density. Regardless of what boost you are running if your air charge is an absolute 29.4psi (2bar) when the piston is at bottom dead center it will still multiply that density by the same factor (your compression ratio) Yes there is more pressure there but you are forgetting that with pressure comes heat. Under boost conditions the charge starts out hotter than NA, is compressed to a temperature much higher than NA, and burns much hotter than NA. This is why when you build a motor for boost the rings are gapped slightly wider to prevent ring buckling. There is no reason a turbo motor should have more blowby then an NA motor...and certainly no reason blow by should be a problem on an NA motor that was converted to turbo.
Buildin' n' Boostin for 08' - Alex Richards
good advice from Matt(gorman) he would know all about boost spikes !!!!
Ha ha ha
