How to: Set up your PCV, Catch Can, Breather, Vacuum system on your RB...

[mott6904]

I want to see some actual exhaust evacuation setups.

[MATTs14]

Look around on here. Theres a guy with a supra that has some videos on streetfire.net. It blows it all out when he lets off. Pretty cool setup if you ask me. Look through all the catch can threads. Its in there somewhere

[sleepersilvia92]

i have a series 1 rb25det ive been looking for awhile since i did my catch can setup but i cant find a replacement crossover hose for the valve covers,mine was cracked can any one help

[Darius]

Twist the fittings in their bores so they face eachother and stick a piece of oil-resistant tubing between them. Done. $2 if you include the clamps.

[l0nestar]

does anyone know where to get the check valves

PCV valve or brake-booster check valve. $2 ea.

[l0nestar]

I want to see some actual exhaust evacuation setups.

x2! Sullivan, where are you at?

[SullivanRacing06]

whats up? send me your email and ill get my car in the air and snap a few shots, if someone will post them for me

the bottom of my car is nazasty tho

but yea ill send pics to whoever to post em

[l0nestar]

whats up? send me your email and ill get my car in the air and snap a few shots, if someone will post them for me

the bottom of my car is nazasty tho

but yea ill send pics to whoever to post em

Email is in my profile. I'll post them for you.

[blurrbosi]

Thread digging... what happened with this exhaust evac setup.?

[l0nestar]

Thread digging... what happened with this exhaust evac setup.?

Still waiting..

[MATTs14]

So you can just run two check valves, either pcv or brake booster check valve, into your downpipe downstream from your sensors and block off the standard pcv and just run it like that?? I think this would be the cheapest and most effective way.

Would this cause a massive amount of smoke or buildup of oil in the exhaust??

Sorry for all the newb questions but i just wanna do it right and possibly help some other that might have questions

[SullivanRacing06]

Email is in my profile. I'll post them for you.

email sent to ya

[SullivanRacing06]

So you can just run two check valves, either pcv or brake booster check valve, into your downpipe downstream from your sensors and block off the standard pcv and just run it like that?? I think this would be the cheapest and most effective way.

Would this cause a massive amount of smoke or buildup of oil in the exhaust??

Sorry for all the newb questions but i just wanna do it right and possibly help some other that might have questions

my car has a smal amount of oil that every once in a blue moon will drip, my car doesnt loose any oil, i have a electric cut out so my crankcase onlysees vacume when the cut out is op[en and if run like this then no one way valves would be needed.

[Coolwhip]

the best way to run the check valve to downpipe stream is to have suitable check valves on the downpipe/turbo outlet that can withstand the heat. You don't want to have exhaust gas in the line, so the check valve should be downstream to allow for best use of the gas' velocity.

[MATTs14]

Ok well i found a kit on jegs that has two of the check valves and is an actual crankcase evacuation kit. I know i wont need the pieces for the valve covers but its cheaper than buying the valves separate.

How far downstream am i going to need to run them and what kind of hose should i get for them. I was lookin at some of the earls or russells, cant remember who has it, super stock hose and possibly some hose heat wrap down around the exhaust area.

[Coolwhip]

Compliments from Sullivan...

His EVAC to downpipe dump setup...

[Neejay]

hmm...it looks like his only works when the cut-out is open, correct?

[SullivanRacing06]

yes, i figured thats the only time i ever beat on the motor so thats the only time the crank case would need vacume

[MATTs14]

I ordered the crankcase evacuation kit which comes with the 2 check valves for the exhaust. My question is, how far down stream do i need to mount them?? Sullivans is pretty far down but he also has a catch can. I dont really wanna do them too close to my wideband or o2 sensor. Also can the check valves be mounted on the underside or on the side of the downpipe or do they have to be mounted directly on top??

[Coolwhip]

IIRC, the velocity of the gas exiting the engine is higher further down stream?

The relation to the mounting of the check valves (top side or under) is irrelevant.

You do want to mount them at and angle so that there is more surface area in which the gas is pulling from (ie: 45* angle) i forget what the technical term for that is called though.

[Neejay]

yes, i figured thats the only time i ever beat on the motor so thats the only time the crank case would need vacume

Yeah, I thought about that after I posted. lol Good point.

[Darius]

IIRC, the velocity of the gas exiting the engine is higher further down stream?

You do want to mount them at and angle so that there is more surface area in which the gas is pulling from (ie: 45* angle) i forget what the technical term for that is called though.

Coolwhip - I think the higher the temp, the higher the velocity. As the gas cools, it is denser and therefore does not need to flow as fast to flow the same amount of gas.

And for the angle of PCV tubes, you want to have them at a 90-degree angle to the flow stream, but "slash cut" the end of the tube at a 45 to maximize vacuum on the system.

Check out this fine art work:

| || || || /V

[SullivanRacing06]

Coolwhip - I think the higher the temp, the higher the velocity. As the gas cools, it is denser and therefore does not need to flow as fast to flow the same amount of gas.

And for the angle of PCV tubes, you want to have them at a 90-degree angle to the flow stream, but "slash cut" the end of the tube at a 45 to maximize vacuum on the system.

Check out this fine art work:

| || || || /V

what i did for the evac nipples running bk into the dump, i went to lowes and bought a piece of 1/4 inch galvanized pipe 3 inches long, cut that in half so i had two 1.5 inch long pieces, ground the one end on each piece to a 45deg angle, then inserted them into the dump at a 45 deg angle, works very well

[maryjane]

what ever happened to sull and this thread?

[gmac708]

whatever happened to Coolwhip?.....

[Coolwhip]

whatever happened to Coolwhip?.....

Present

[rb25det250sx]

Thread digging...

saw it and it made me cry been looking everywhere for a good set-up.

So like figure 2 i can vent both cam covers in to the catch can, and then put a filter on the bottem. or do i have to run it into the intake pipe b4 the turbo.

[Coolwhip]

Thread digging...

saw it and it made me cry been looking everywhere for a good set-up.

So like figure 2 i can vent both cam covers in to the catch can, and then put a filter on the bottem. or do i have to run it into the intake pipe b4 the turbo.

Correct, you'll just need to block off your PCV port and the port on the intake pipe. Plus you'll want to have the breather filter higher up on the catch can rather than on the bottom. Oil is heavier than the air/vapor emitted. So the oil is going to the bottom of the can and the air will go to the top (in a perfect setup it should be able to seperate the two) so you'll want to vent the air not the oil.

[rb25det250sx]

oh..okay..sounds resonable.

[sr20tom]

now in the picture i see that you are running 2 lines to the exhaust. Is it Sufficient to have the original fat rubber hose linking the 2 outlets on the valve cover and runnig one line out of one of the ports into a can and one line into the exhaust?

Thanx