Denovae Posted February 16, 2007 Report Share Posted February 16, 2007 In correlation with the How To i posted on boost leak testing, one boost leak you will not be able to check is the line from the throttle body to the PCV valve under boost conditions it will pressurize your head with boost creating out of your breather valve.How many of you would be interested in a fix for this problem if any? You may see slight gains in boost pressure at the intake manifold and would cost approximately 40$ shipped. Link to comment Share on other sites More sharing options...
ArmyINFDoc Posted February 16, 2007 Report Share Posted February 16, 2007 does this apply to volvos? Link to comment Share on other sites More sharing options...
Denovae Posted February 16, 2007 Author Report Share Posted February 16, 2007 does this apply to volvos?do you have a line running from your throttle body to your valve cover PCV? are you running a catch can? Link to comment Share on other sites More sharing options...
Patrickw Posted February 16, 2007 Report Share Posted February 16, 2007 :blink: what are you selling? is it a replacement for the stock system or what?does anyone have a clue wtf is going on? Link to comment Share on other sites More sharing options...
Denovae Posted February 16, 2007 Author Report Share Posted February 16, 2007 what are you selling? is it a replacement for the stock system or what?does anyone have a clue wtf is going on?your PCV valve will be closed when under boost forcing vented un combusted gases back into your intake system. this will gunk up your turbo, pressure pipes, and your intercooler. basically you have many options to consider:installing a breather or catch can on the side of head that goes back to your intake.installing a catch can on the line going from your throttle body to your PCV.installing both catch cans.another option is either the breather or catch can on the breather side of the head with the catch can on the PCV/throttle body line with another check valve inline with the throttle body to PCV. Seeing how most PCVs stock will leak boost into your head forcing more unspent gases and gunk into your intake system clogging it up. this is where the oil from when you change your intercooler pipes / check your turbo for debris. a second inline check valve will prevent boost from going from the throttle body to your head gasket limiting unspent gases being sent to your intake system. this also means that boost (i.e. power) will be increased because there won't be another boost leak. DSMs, EVOs, and SRT4s have been using this set up for a while to help maintain your engine cleanliness and prevent boost leaks. the Check valve will still open under cruising as is the stock manner of the PCV but under boost it will prevent leaks.note - this wouldn't be me selling it rather directing a well known EVO/SRT/DSM/Mazdaspeed tuner to you guys making this product available to you. Link to comment Share on other sites More sharing options...
Patrickw Posted February 16, 2007 Report Share Posted February 16, 2007 ok, so its just a container to catch all the oil-gunk so it doesnt get to your turbo.. good idea. Isnt there a container on the stock setup? i have to do my pcv system and i know theres some sort of canister under the intake.. im guessing thats what catches the gunk sorry if im turning this into a PCV system thread Link to comment Share on other sites More sharing options...
Denovae Posted February 16, 2007 Author Report Share Posted February 16, 2007 ok, so its just a container to catch all the oil-gunk so it doesnt get to your turbo.. good idea. Isnt there a container on the stock setup? i have to do my pcv system and i know theres some sort of canister under the intake.. im guessing thats what catches the gunk sorry if im turning this into a PCV system threada catch can is a container to catch all the oil coming from your head. a check valve in conjunction with a catch can will aid your system a lot more efficiently. a catch can will not prevent boost leaking from the TB to your valve cover. a secondary check valve will inline with the PCV will. Link to comment Share on other sites More sharing options...
Plan_B Posted February 16, 2007 Report Share Posted February 16, 2007 a catch can is a container to catch all the oil coming from your head.Sounds like a personal problem to me. Link to comment Share on other sites More sharing options...
turbobrick Posted February 16, 2007 Report Share Posted February 16, 2007 http://volvospeed.com/Mods/catchcan.htm Link to comment Share on other sites More sharing options...
Denovae Posted February 16, 2007 Author Report Share Posted February 16, 2007 http://volvospeed.com/Mods/catchcan.htmYou can utilize a catch can with this unit but the CC has nothing to do directly with the CV. Link to comment Share on other sites More sharing options...
turbobrick Posted February 17, 2007 Report Share Posted February 17, 2007 i was under the impression on these cars that the particular "boost leak" you're speaking of was actually a pretty big necessity on this car, there is a valve that exists that is routed directly into the intake right before the turbo it plugs into the dongle looking piece that actually has a heater built into it and the the main PCV line, the heater is for keeping the oil from collecting and gunking up right at the point where it enters the intake itself; the vacuum line is what im speaking of, putting a check valve in that line would prohibit the crankcase from ventilating properly which would result in excessive crank case pressure and seals failing prematurely.if im reading this thread right, this is what you're speaking of. Link to comment Share on other sites More sharing options...
chaze1385 Posted February 17, 2007 Report Share Posted February 17, 2007 Do a search on turboford.org. All those guys put a checkvalve in the line going to the pvc valve. It keeps you from pressurizing the crankcase with boost. Mine is a brass valve from an old mazda brake booster. CHad Link to comment Share on other sites More sharing options...
Denovae Posted February 17, 2007 Author Report Share Posted February 17, 2007 i was under the impression on these cars that the particular "boost leak" you're speaking of was actually a pretty big necessity on this car, there is a valve that exists that is routed directly into the intake right before the turbo it plugs into the dongle looking piece that actually has a heater built into it and the the main PCV line, the heater is for keeping the oil from collecting and gunking up right at the point where it enters the intake itself; the vacuum line is what im speaking of, putting a check valve in that line would prohibit the crankcase from ventilating properly which would result in excessive crank case pressure and seals failing prematurely.if im reading this thread right, this is what you're speaking of.the check valve is not going on the ventilating side. it goes on the line from the TB. it does not prohibit ventilation in anyway, it prevent boost from pressurizing your head. the check valve in question's main purpose is not to prevnt gunk from entering your intake system, rather stopping a boost leak and prevent your head from pressurizing. yes a pressurized head will force the "gunk" into your intake system. Link to comment Share on other sites More sharing options...
turbobrick Posted February 18, 2007 Report Share Posted February 18, 2007 line 11 is what i was referring too. Link to comment Share on other sites More sharing options...
chaze1385 Posted February 18, 2007 Report Share Posted February 18, 2007 I have never had line 11 connected on my car. Chad Link to comment Share on other sites More sharing options...
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