mike6789k

it really isnt though...

on a stock tc, the pcv is in constant vacuum, but now in your FI tC, the pcv is under boost alot of the time, so it has trouble venting properly... you need to move the outlet to a source of constant vaccuum...

jetlounge

iTrader: (3)

i thought the prob was that the pcv on the tC leaked boost...

mike6789k

never heard that one before... its a possibility though...

but the main problem is the boost isnt alowing the blow-by to fully escape from the pcv

jetlounge

iTrader: (3)

but is that necessarily a bad thing? pcv closed means boost held. pcv left constantly open means boost leak, right?

mike6789k

the pcv is one way, it only lets stuff out, but if there is boost in the line, the pcv will stay closed and blowby will not vent from the engine.

Wyatt_Herb

Which in my opinion is the cause of every destroyed motor that was running a supercharger.
For informations sake: what happens when blow-by isn't properly ventilated? Can sludge build-up contaminate the fuel?

hotwheelsrs1

ok so do we really need to can up both the lines?

jetlounge

iTrader: (3)

every "destroyed" motor that was running an s/c??
there are many documented poorly installed s/c's..but destroyed motors? how many do you count of those?
i think you are making a huge leap here.

mike6789k

yea lol you dont destroy motors with a clogged pcv... but you can cause some problems...

jetlounge

iTrader: (3)

i don't think its only one way. thats the intention, but under boost it will get pushed. and you'll lose a little hp.
this is most likely why when some have capped the nipple on the intake mani and routed the PCV out to vaccum they got a little more oomph...not because pcv vapor couldn't get out before the cap off, but because boost was pushing in.

so a PCV for boosted applications would be in order..and a better vac solution for the breather. air will take the path of least resistance.
at the end of the day, the catch can is just a bandaid to the blow-by problem

Wyatt_Herb

I've been through two motors myself and destroyed a couple cats, which from what I understand is caused by a lean condition...hence the question, can blow-by cause sludge build-up, contaminate your fuel, lower your octane, cause detonation, destroy a cat...etc. etc.
There hasn't been many but it has happened. Look at Equinox. Where does the oil go that seems to disappear? I am just looking for an explanation.
Once again I've been through two motors both of which were missing 45 psi in hole #3. How do you lean out a motor with the "safe" TRD map? I'm not trying to argue I am just dying to know. Is there a difference in the dynamic between a turbo and supercharger when it comes to blow-by?
These threads led to such assumtions:
https://www.scionlife.com/forums/vie...ighlight=catch
https://www.scionlife.com/forums/vie...ighlight=catch

mike6789k

cats are destroyed by rich conditions

tC9o9

who needs cats anyways?

Wyatt_Herb

Even stranger. . .

jetlounge

iTrader: (3)

yeah. i always thought cats were destroyed by dogs.

Whocares05050

Thats what i say

mike6789k

fox

I don't know if this will help because it's on a turbo setup?

mike6789k

thats the idea... but the PCV would be a better choice to use instead of the breather (which doesnt NEED a vacuum source and could just be VTA

hunterUnknown

iTrader: (1)

hate to resurrect a thread but i need to install a catch can as well.

my cat just died. (that sounds sad)

but yeah, its getting replaced now. and a quart of oil magically disappeared. ive only been s/c for about a month. 3000 miles-ish.

helpful info guys!