Turbo owners; You HAVE a boost leak!

[The Barron]

Just a little tip for quicker,more consistant boost. In the below pic the hose that goes from the intake manifold to the PCV valve which "Y's" to the valve cover and to the air filter box LEAKS PRESSURE out the PCV valve and back into the atmosphere! Pull the hose off of the intake manifold and blow through it..you'll be suprised to see how much you yourself can blow through it..just imagine how much air is going out of there at 15Psi boost!

The fix I am going to try is put a large vacuum line check valve where it flows vacuum but closes during boost. If anyone has a vehicle that hasent just chewed the timing belt tensioner up, try it and let me know if you notice any diff.

[OneFastBaron]

i doubt theres very much boost leaking out of there. the pcv valve should stop it from leaking.

[The Barron]

If it worked like a check valve then its funny that one can blow through it...I thought maybe it was bad so I tried my other two car and I could blow air through them too.. its just a thought is all.

[OneFastBaron]

Quote:

Originally posted by The Barron If it worked like a check valve then its funny that one can blow through it...I thought maybe it was bad so I tried my other two car and I could blow air through them too.. its just a thought is all.

u sure you were blowing thru the right end

but if you really wanted i guess you could try a 1 way check valve in that line... thats all the pcv valve is really.. try somthing better

hell i may just try that now :big grin:

[OneFastBaron]

o yeah and i forgot to add that its not gonna give you any more boost if your still in stock form without a MBC.

[The Barron]

Quote:

u sure you were blowing thru the right end

oh..you insult me!! :big grin:

I know it acts "like" a check valve..one that leaks both ways...

I know in the end you wont really GAIN much PSI but your turbo wont have to work as hard to sustain it. When I tune my engine I want to tune/mod it for "EFFICIENT" horsepower.

Anyone can just install a grainger valve and crank the boost up and allong with it increase heat,engine strain and other undesirable stuff. I want to relieve the engine of work via underdrive pulley,removing the counter ballance shafts and installing an oil pan baffle in the end it can put more power to the wheels instead of wasting it other places and in the end make it easer on the engine, encouraging durability.

I'm not trying to sound know it all, sorry.. just telling you what angle I am coming from.

[OneFastBaron]

Quote:

Originally posted by The Barron oh..you insult me!! :big grin: I know it acts "like" a check valve..one that leaks both ways... I know in the end you wont really GAIN much PSI but your turbo wont have to work as hard to sustain it. When I tune my engine I want to tune/mod it for "EFFICIENT" horsepower. Anyone can just install a grainger valve and crank the boost up and allong with it increase heat,engine strain and other undesirable stuff. I want to relieve the engine of work via underdrive pulley,removing the counter ballance shafts and installing an oil pan baffle in the end it can put more power to the wheels instead of wasting it other places and in the end make it easer on the engine, encouraging durability. I'm not trying to sound know it all, sorry.. just telling you what angle I am coming from.

sorry if that sounded like an insult to you i really didnt mean it like that i was pretty much joking... i mean it could happen.

i know what your saying. and your right it does leak somewhat im sure. however i doubt it would be enought to lose even 1 psi. its a very good idea. try some expeirmenting, prove me wrong. ill admit that i was wrong :big grin:

[The Barron]

I knew you were joking. The picky point I am trying to make is: say your running 15psi total boost and your total vacuum system is leaking 3Psi. Your turbo now has to spool fast enough to generate, in EFFECT,18psi whereas if your vacuum system only leaked .5psi the turbo has to spin/work less.


Its all nitpicking I know.. but its a theory. A theory I would be more than willing to TEST if it wasnt for this ARRGG!!! Timing Belt tensioner seized!!

[OneFastBaron]

Quote:

Originally posted by The Barron I knew you were joking. The picky point I am trying to make is: say your running 15psi total boost and your total vacuum system is leaking 3Psi. Your turbo now has to spool fast enough to generate, in EFFECT,18psi whereas if your vacuum system only leaked .5psi the turbo has to spin/work less.

heh i was hoping you knew i was only kidding about that.. us baron owners need to stick together i know, understand your theory. however im just saying that i seriously doubt it is losing very much pressure.

Quote:

Originally posted by The Barron Its all nitpicking I know.. but its a theory. A theory I would be more than willing to TEST if it wasnt for this ARRGG!!! Timing Belt tensioner seized!!

ouch... thats no good. i may very well try your theory if im not busy before school starts. (starts next thrusday! )

[The Barron]

well.. if anything maybe it wouldnt put so much oil from the valve cover down into the filter box. After about every 10,000Km the bottom of the filter is all soaked in oil anf you have to clean it all out.. blah!

[OneFastBaron]

Quote:

Originally posted by The Barron well.. if anything maybe it wouldnt put so much oil from the valve cover down into the filter box. After about every 10,000Km the bottom of the filter is all soaked in oil anf you have to clean it all out.. blah!

well you can stop that easy. www.gusmahon.org then check out gus' tech tips for a downdraft PCV system. thats what i did.... solves that real easy :big grin: plus i run a CAI i wouldnt even be able to run it to any air box anymore :big grin:

[Garret]

No, you just run a Cone Filter

[OneFastBaron]

Quote:

Originally posted by Garret No, you just run a Cone Filter

nope... now its a offical CAI

[The Barron]

ooooh ,Cone filter, CAI whats the diff?

[Garret]

CAI = Cold Air Intake which brings in air from a "non underhood heated" location

Cone Filter = Cone filter on the end of the turbo intake hose :big grin: