Coolest Oil Catch Can

phunk

I have seen the exhaust PCVs used in the past and I agree that they are pretty slick and probably provide superior crankcase vacuum at high engine load where there is none in the manifold.

You are correct about how my PCV is running. My VC to IM are stock, and my VC to air filter tubes are unfortunately before the MAF due to blow-through MAF setup. But ya I played with it and it doesn't seem to be flowing enough unmetered air that my feedback cycles for idle and fuel trim cant handle it.

Usually all I will do (if needed) to a PCV system for a higher power FI car is enlarge the vents if possible, or add another if needed. My only real argument about why I dont use a catch can "just because" is only about space, organization, clean engine bay, etc. I prefer to eliminate anything in the engine bay that is not needed as, especially with twin turbos, space comes at a premium.

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1slow370

Hmm never heard of slash cuts being illegal at most tracks, i mean if you have a blow up chances are oil is coming out of your car from many places including LOTS of it coming out your exhaust. I have had my windshield sprayed a couple times already from cars that were just in crap condition and they pass tech. I KNOW they are legal at just about every dragstrip and i say "just about every" because there may be a backwater strip somewhere that's banned them. and most scca and nasa classes don't let you touch the pcv at all except for the addition of a catch can, but you have to use factory hose routing and no external filters.

edit: i actually spent a couple hours reading through different class regulations here and there and it is either no restriction or oem only for the most part so it all depends on your class and tech. also unless you have a SEVERE problem, there isn't going to be any real oil coming out because hot oil and air mixture + header collector or downpipe temperatures = burning oil fumesresulting in some carbon put no oil per say

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synolimit

True oil will come out but again coming out just the exhaust vs coming out the motor then the exhaust is the difference. And I've never seen track or drag strip rules, its in the race organizations rules.

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1slow370

you mean like track day club rules? I know most hpde days don't tech anything past safety belts, helmet, tires, and brakes. If you are talking organized racing classes most class rules are either it needs to be stock or no restriction. There are no restrictions on pcv in any TT class for example.

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takjak2

Can we have a simple up/down for the benefits if any for N/A 370Zs?

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Chuck33079

Pros- cleaner intake tract. Cons- cost, under hood clutter. Is it necessary? No.

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G37sHKS

So what we can do here for TT setup?

Im interested in purchasing oil catch can with redesigned PCV for TT application if some1 came up with.

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Ill

G37sHKS,
I actually was PMing Sh0vel about this a few days ago since I am looking to run one in my GTM TT when I get it all installed. This is what he said in his reply;

So, for an FI setup, you would want to plumb it a little differently. Basically, put a breather filter on the fat connection (back of the cover) and put the front connection into the catch can with the can outlet dumped into another breather filter.
Then cap/plug the manifold nipple (sticks out the front of the manifold).
This is the only way I see to do it that will relieve pressure build up from blow-by and still catch the oil. Crankcase scavenging at non-boost times will be a little poor, but most agree it's not a big deal. This is the really simple way of doing it.


Now the more complicated way;
For my own car, I would probably set up a pair of check valves on the cans.
Basically one between the manifold and the can that only allows air to pass IN TO the manifold, not out of. Another between the can and it's breather that allows air OUT but not IN. Then I'd plumb the fat connection (back of the cover) to the inlet pipe after the MAF (if a connection is available there).This way, you maintain the excellent scavenging off boost but won't have issues while on boost.

I replied and am patiently waiting for him to finish a diagram / parts list he's working on, he mentioned it earlier in this thread.

<slightly off topic> I ordered my Saikou Michi catch cans today </off topic>

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Plasmite

Are catch cans a worthwhile thing to have to keep carbon deposits down in the engine, FI and NA?

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Optimiser

Probably not, but I'm getting some anyway as I am setting my car up for some track days.