????'s for fiz or other ka24det brains machines!!!

[1995240sxSE]

on the pcv stuff, how else might I re route my hoses. pretend u r talking to a moron cause it may have been stated in your intake manifold writeup but I couldnt catch it! I hooked the lint form the pcv box to the intake but it is kinked, I am gonna buy a 90 deg. fitting and place at kink. What could be done to remove this and hook up with a catch can...??? I am confussed on the whole system and what it exactly does!

[9sec240]

The factory PCV system works like this.

The tube that goes from the valve cover to the intake tube allows fresh, filtered air into the crankcase. On the side of the front cover is the baffle box that the PCV valve is screwed into. This is a one way valve which keeps gasses flowing in the correct direction. The PCV valve is hooked to a rubber hose which is also attached to the metal distribution rail under the intake manifold. The distribution rail is then attached to the intake manifold runner bungs with four small rubber hoses. During high vacuum situations crankcase gasses are pulled out of the crankcase as fresh air is being let in through the valve cover. The reason for this is to remove gasses that build up in the crankcase due to combustion gasses getting past the rings and from the oil getting super heated. These gasses break down your oil quickly.

[9sec240]

There is more info HERE that you can check out. It goes into how you can run your PCV system

[nissanfanatic]

Ideally, I want to have a filter on my valvecover port, then run a hose from my stock PCV valve to the bottom of a catch can. The catch can needs to have steel mesh in it. And then run a hose from the top of the catch can to an electric vacuum pump.. That will maintain adequate airflow through the engine...

[frsh13]

So is a catch can with one end hooked up the the valve cover and the other end left open a bad idea? Been running my setup like that for a while now

[nissanfanatic]

I actually just have a hose on the valvecover and a hose on the PCV valve and I have them aimed at the ground.. Its been working alright for a while now..

[rlvq35de]

This topic always comes up. No one comes up with the ideal setup.

I believe without going nuts on the pcv system, the best way is to put a filter on valvecover, plug the ports on the bottom of your intake. Route a line from PCV valve to catch can, and then catch can to intake pipe, pre turbo.

Thats how im doing it. I definately think boosting the stock system is very very bad, Those PCV valves will not hold high boost pressures. And piston ring failure is definite.

Rob

[nissanfanatic]

This topic always comes up. No one comes up with the ideal setup.

I believe without going nuts on the pcv system, the best way is to put a filter on valvecover, plug the ports on the bottom of your intake. Route a line from PCV valve to catch can, and then catch can to intake pipe, pre turbo.

Thats how im doing it. I definately think boosting the stock system is very very bad, Those PCV valves will not hold high boost pressures. And piston ring failure is definite.

Rob

I personally do not want blowby being routed back into my intake. It lowers the effective octane of a fuel. And on top of that, an electric vacuum pump will pull GOOD vacuum on the crankcase instead of the minuscule amount that the compressor inlet will pull.

[AZhitman]

I simply run a small filter on the crankcase vent as well. Then again, I pulled my VC after 1200 boosted miles and it was white-glove clean.

[1995240sxSE]

but did u plug off your intake ports that the crankcase vents into? That is my main concern cause I put new hose on that but it is kinked! I am gonna just pull it off and do the catch can and plug the line going into the intake!

[1995240sxSE]

while I got these guru's are gathered, not to insult y'alls intellignece, but what do the marks on the crank pulley stand for. I have been searching and cant find a damn thing! i know it like xx, xx, 15 and 20 btdc,. I searched the fsm nothing. which one is 20 and what and where is 15 and so on and so forth

[AZhitman]

but did u plug off your intake ports that the crankcase vents into?

Well, mine's all custom fabbed (coldpipe), but yes. Just plug it.

[AZhitman]

while I got these guru's are gathered, not to insult y'alls intellignece, but what do the marks on the crank pulley stand for. I have been searching and cant find a damn thing! i know it like xx, xx, 15 and 20 btdc,. I searched the fsm nothing. which one is 20 and what and where is 15 and so on and so forth

Look on 240sxTech.com, article is titled "timing your KA" or something like that.

[1995240sxSE]

cool thanks

[rlvq35de]

I personally do not want blowby being routed back into my intake. It lowers the effective octane of a fuel. And on top of that, an electric vacuum pump will pull GOOD vacuum on the crankcase instead of the minuscule amount that the compressor inlet will pull.

as i stated, withoug going as crazy as putting an electric pump, i think that is the easiest most effective way. I honestly do not believe i will get that much loss in octane, and will pull plenty of vacuum to ventilate crankcase effectively. Alot of people outside the KA world run a similiar setup and have ZERO problems.

imo cheap and effective Im not saying if ams made a nice kit I wouldnt buy it

[Suicide.Veteran]

i found it easy to get a metal 90 degree connector from the plumbing section at home depot. no kinks, and you can use softer lines less prone to cracking. Just run the can between that and the pc valve

blow by gasses that get past the rings during the combustion process escape into the block the PCV system is a one way check valve allowing air to escape when hi pressure is present. at idle i believe its closed and at WOT it is fully open.

It is best to get a 19mm deep well and take it off while you have a chance to get to it and spray some degreaser and carb cleaner on it for a cheap fix or buy a new one. cuz once it sticks and everything is on, its a ***** to get off.

older cars used to run the line to open air, but due to emission standards, they rerout the gasses back into the intake to be reburned much like the egr system.