ZUL FC3S

hy to all,i have question about a "black plastic can" stand at the corner on my left side engine bay,it have a few hoses joint to the engine,it is oem part..looks like an oil catch tank..i really dont know..anybody can tell me what is it?what is for?what the function? can it removed?anything need to blocked after removed?and is it a good idea to install an afermarket oil catch tank at my FC3S 13BT engine?? anybody done?can anybody tech me how to install?can post some pic? anybody help me please..thks cheers...

RotaryRocket88

iTrader: (7)

Charcoal canister. It collects fuel and oil vapors, so if you remove it, you will need to reroute hoses to a catch can.

ZUL FC3S

so meaning to say it also same as "oil catch tank" im plain to buy and install cusco or other brand aftermarket oil catch tank..so as u say remove the charcol canister and just simply replace with to my aftermarket oil catch tank,is my sence correct?? post me the pic bro please... thks

GeenIdee

I don't understand why you would put oil catch tank on a rotary. I know the reason on a piston engine but can't figure out any reason to put in on a rotary.

So i realy wonder which tank you mean, can't find any in my engine bay? You got a pic?

ZUL FC3S

im new in rotary and really don't know much about the rotary engine...i don't know it is a good idea to install an aftermarket oil catch tank to rotary engine or not,thats way im here,to ask from u all member regarding about it.. now im still waiting someone can help and show me some pic "how to install the oil catch" by the way the "black plastic can"is located at the corner on the left side of the engine bay,next to the trailing(T)coil.. sure u can find if yours is FC3S.. anyway thks..

GeenIdee

Do you mean that hing in front of the fuses?

rusty FC

iTrader: (7)

i am new to rotarys also but have been around sport and race cars from the day i was born, dad use to race. so the oil catch tank is there to keep oil that passes throu the pvc system from gettting into your intake and head and guking it up. now like i said new to rotary so if they have a pvc system or somthing simler, then you would want a catch tank.
here is a pic of the one in my supra
and for removing the charcoal canister you will need to vent your fuel tank and cap any vaccume lines.

w.sen

iTrader: (8)

I removed my emissions on my S4 13b. Part of emission deletes were the pvc that comes off the oil filler neck. From what I understand I cannot just cap the crackcase so I had to use a oil catch can so my oil catch can comes off the oil filler neck and routes to the back of the dynanic chamber( the thing that says mazda 13b injection on it) I kept th carcoal canister.

MY question is can I run the hosing from block that goes to charcoal canister to the catch can??

GeenIdee

What is a pvc system?

rusty FC

iTrader: (7)

http://en.wikipedia.org/wiki/PCV_valve

fc3si

wow this thread is amazing.the charcoal canister and oil catch can are 2 WAYY different things.

oil catch can: used for race/turbo application with high "blow-by" to prevent oil from being inducted through the intake passage or forced out of the engine.

Charcoal canister: used in evaporative emissions to vent the fuel tank and induct fuel vapor into the engine to be burnt.

if your car is n/a or a stock t2 you don't need a catch can but it might look cool.

GeenIdee

a quote from wiki:


A rotary actualy doesnt have a crankcase but it does have an oil pan. But i wonder if there is a presure build up in the oilpan of a rotary. If not, again my queston, why a oil catch tank / breather tank on a rotary?

rusty FC

iTrader: (7)

if it has a pcv then oil will get through and coat your intake ports thus slowing the flow of air. plus it just bothers me knowing its getting in there. and it does have a crank case, may not be as large or have as many parts as a piston engine but it still has one.

w.sen

iTrader: (8)

The thought behind the catch can is that the oil is heavier than air and drops to the bottom the can. As the air comes into the intake to be combusted.

Like in mine there's is barely anything in mine just like a shiny coat around the can.. And for the intake manifolds.. Not oily or nasty like some may think. I have had my intake manis on and off like tons of times doin dif projects.

I needed it in my deletes. Like the only reason there is oil in it is cuz I tried to put a lil oil in while the car was on as soon as I poured a lil in the catch can sucked it up. It fell rite to the can and nothing came thru the other hose goin to the intake.

Aaron Cake

iTrader: (1)

To clear a few things up, the PCV system and charcoal canister don't serve the same purpose. But they are tied together in stock form just out of convenience as both need to be vented into the intake so the vapours are burned.

A catch can is really only needed on turbocharged rotarys as boost tends to pressurize the crankcase and blow oil vapour into the PCV system.

It's silly to put a catch can on an NA unless you are actually experiencing oil burning issues from track driving, which is unlikely.

GeenIdee

A rotary engine does not have a crankcase.

The crankcase is the housing of the crankshaft and is located below the cilinderblock.

(this is a copy of wiki, it a bit hard for me to explain some things in english)

Anyway, in a 4stroke engine it is mainly filled with air and oil. But because a rotary engine has an oilpan, it doesnt mean it has a crankcase. A rotary engine has a front, center and rear housings with rotorhousings between them and an oilpan under it.

TwEaK

iTrader: (6)

did you mean? cylinder? and no... eccentric shaft on a rotary (crankshaft) is inside the housing.. same with the rotors there is nothing below the cylinder block except an oil pickup and oil.....
TwEaK

GeenIdee

From up to down:

cilinder head /camshafts & valves etc
cilinder block / cilinders & pistons
crank case / crankshaft & piston rods
oilpan / oil etc


crankcase (underside of a 4-stroke engine block) :




I am young and learning, but so far you can not make me belive a rotary engine has a crankcase.

GeenIdee

I spoke to a friend that also has a TII. He answered a queston of mine, and i will tell you what it is.


A rotary engine does indeed have a presure build up in the oil pan. Espesialy at a turbo engine (still speaking of a s4 / s5 rx7). It seems that a rx7 FD has this more then a rx7 fc.

Presure can build up in the oilpan, so also in the oil fill neck (or however u call it). I havent checked it but it seems that there are hoses on the filler neck for ventilation.



But ZUL FC3S, you realy need to be clear about wich can your talking about.

If you speak of a lhd (left hand drive) car, the right side is always the passanger side. Even when you stand in front of the car looking in the engine bay, passenger side is still alway right! Not left.


The canister on the right side near the cruise controle unit has something to do with the fuel system, don't know what yet.

And the can on the left side in front of the fuses is a vacuum chamber.

Hope this make some things a bit clear for everybody. Im still searching for more info about the can in front of the cruise controle unit.

rusty FC

iTrader: (7)

The canister on the right side near the cruise controle unit.


it filters the fums from the gas tank so they do not get into the air.

w.sen

iTrader: (8)

Next time your car is running pop your hood and twist off the oil cap.. That will tell you if there is pressure in the crankcase.

Aaron Cake

iTrader: (1)

Whether the chamber in the middle of the centre iron can be called a "crankcase" is probably dependant on personal opinion, but since the eccentric shaft rotates through it, and it is a "case", and the eccentric is the equivalent of a cam and crankshaft, then "crankcase" seems an apt description.

But the real point of this discussion is that the rotary engine does have a cavity with accumulates vapours just like a piston engine. This cavity is made of the space between the bottom of the block and the oil pan, and the center hole in the middle iron through which the eccentric passes.