i have a 91 crx hf with a b18b in it...was wondering wher the hoses for the catch can go exactly....i know the inlet comes off the nipple on the back of the head right?? and the other directly from the pcv valve?? if thats the case then u just plug the nipple on the upper part of the manifold??just confused on exaclty where they go ne help will be greatful.....

 

its no surprise you are confused. because ppl dont seem to agree on how exactly one should route a catch can.

quite frankly, i think my way is the best way. of course.

but it depends on which catch can you have, or if youre going to design a catch can system, properly. most of the catch cans ive seen sold are not designed properly.

i recommend routing a hose from the valvecover AND the PCV valve directly to the catch can. then you have an outlet on the top that is released to air. you can put a tiny filter at the outlet if you wish.

then you just plug the remaining nipples at the air intake and manifold and call it a day.

you can also either bypass the PCV valve and route straight from the back of the block, or just plug the block completely. the opening coming out of the valve cover is sufficient in releasing the amount of air created. but you dont have to consider this, just for race engine setups.

now, the "improperly" designed catch can goes on the basis of routing the air back into the intake manifold after some baffling to utilize the negative pressure (vacuum) created by the intake manifold. i see that as unecessary. but whatever.

so you would want to then just run a return line from the catch can to the intake manifold, and plug the intake pipe.

which catch can do you have?

 

well i dont have one but i wanted to get one cuz ne thing i can do to keep my engine healthy i will......i notice ther is a hose that goes directly from the pcv valve to the intake manifold....so what ur sayin is run the one from the valve itself to the outlet on the can, and run the hose from the valve cover to the inlet??and then plug the hole on the manifold where the valve went to inthe first place??as far as which one what do u guys suggest??whats the best way to go about it??thanks forthe help

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hizroyalty &raquo;</TD></TR><TR><TD CLASS="quote">well i dont have one but i wanted to get one cuz ne thing i can do to keep my engine healthy i will......i notice ther is a hose that goes directly from the pcv valve to the intake manifold....so what ur sayin is run the one from the valve itself to the outlet on the can, and run the hose from the valve cover to the inlet??and then plug the hole on the manifold where the valve went to inthe first place??as far as which one what do u guys suggest??whats the best way to go about it??thanks forthe help</TD></TR></TABLE>


um, i think you understand half of what i said.

both the hoses from the PCV valve and the valve cover go to the catch can. then plug both the holes at the air intake pipe (originally from the valve cover) and the intake manifold (originally from the PCV valve). the catch can should then have a outlet with a filter on the top.

thats all you need.

moroso and jaz make decent off the shelf catch cans. the real ghetto way, but just as effective is just dumping it into your choice of plastic container (oil bottle, soda bottle, whatever.)

this is nice because it has a drain valve at the bottom. you can actually set it up to recycle the oil back into the engine if you wanted to.
http://www.jegs.com/cgi-bin/nc...r=361


i think moroso also has a 2 inlet can as well. this one just has one. like i said, you could plug up your PCV at the block and just route one single line from the valve cover and youd be fine. you could also weld in your own bung as well.
http://www.jegs.com/cgi-bin/nc...r=361

 

ok yeh thats what i thought sorry if i wasnt clear.....thanks for the help....o yeh i think imgonna get the one u showed me....i liek the design, and i would rather that than the chrome ones that are out there...thanks

 

btw, now that you are understanding me, here's my previous setup.



i removed the charcoal canister and replaced it with an old civic (3rd gen) radiator coolant tank. it fits perfectly because it slides into the tapered bracket the old charcoal canister was held up by.

i never got around to fitting a filter on the top of the cap before i sold the car. i still have the pieces, i just dont feel like installing it on my current 200k+ mile engine. it aint gonna get any cleaner...


oh yeah, here's how ghetto it gets in the track paddock... (k20 in a 4dr integra i think)



Modified by Tyson at 6:59 PM 9/13/2005

 

yeh i hear that....damni dont feel so bad, my intake is gangster but not that gangster.....lol...gotta do what u gotta do to make **** happen!!...and how r u gonna do something like that to a freakin k series!!!!!whatevr works

 

lol, yeah, my intake was made out of 3" dryer duct and duct tape.




stock airbox is just as efficient as any cone filter. it has a 3" nipple. the only restriction before the throttle body is the intake tube.

plus, this way, theres no longer any nipple in the intake tube to plug.

 

very true.....i used to not care what my **** looked like but now i am gettin into tryin to clean the swap up and make it look super clean....i dont like allthe wires and **** like that hangin all over the place....i wanna make it look like there isnt ne thing there....itll bhe a pain in the *** but ive started some and i wnna look into gettin some cosmetic enhancements in my engine bay....o btw, someone on another site said u also run a hose from the can to the nipple on the intake manifold??is this legit??lmk thanks

 

thats the "improper" way i described above.

the point is to use the intake manifold vacuum to pull air through the can, like stock.

heres why i say its improper:

1. the point of the catch can is to prevent oil vapor from entering the intake manifold. routing it BACK into the manifold totally defeats its purpose. yes, if the can is "baffled" it should help to separate some of the oil vapor, but not all. so whats the point? youve connected the intake manifold to a canister designed to hold oily vapor... kinda NOT the point, dont you think?

2. they say it NEEDS the vacuum because it pulls the air out of the crankcase. well, theres a stronger POSITIVE pressure coming FROM the crankcase, pushing air OUT. it doesnt need any help "pulling" air in. thats why its called the Positive (pressure) Crankcase Ventilation system.

3. the PCV system is all about getting rid of bad gases (blowby) created by the combustion process out of the crankcase. the stock system routes them back into the combustion chamber, instead of into the air (environment), since thats the more eco-friendly choice. whatever, why would i want these bad gases back in my engine?? I want fresh air in my engine, not already burnt off gases.

 

btw, if anyone ever uses some diagram that looks like it was scribbled on a napkin from a guy who calls himeself "T.O.O." as some kind of reference,

ignore it.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Tyson &raquo;</TD></TR><TR><TD CLASS="quote">btw, if anyone ever uses some diagram that looks like it was scribbled on a napkin from a guy who calls himeself "T.O.O." as some kind of reference,

ignore it.</TD></TR></TABLE>

Amen.

For the record I 100% agree with Tyson on this one....and I personally use a 1 Liter Mountian Dew bottle for my race kaa.

 

how would i run an oil catch can on a b20vtec? there is no pcv valve. the pcv valve was located in the old b20 head and i have no clue where to run this. anyone know how to do this? not driving car because its buildin some serios oil pressure.