PCV Catch Can on Metro?

[SirKeats]

Anyone ever rig up a PCV Catch Can on their Metro?

Have any pics? I started to play around with setting one up last night but had trouble getting it to fit. Just not enough space to run the tubes. Would love to see if anyone else has had better luck.

I'd assume that a catch can would aid in efficiency since it's removing pollutants from the fuel stream.

Thanks!

[SirKeats]

no one???

[COMP]

do you have that much blow-by ???

[SirKeats]

not that i'm aware of... i just not this to be a fairly common performance mod (for speed daemon folks) that i assumed would also transfer over to ecomodding well as it removes pollutants from combustion which should, i would think, increase efficiency.

[COMP]

Originally Posted by SirKeats

not that i'm aware of... i just not this to be a fairly common performance mod (for speed daemon folks) that i assumed would also transfer over to ecomodding well as it removes pollutants from combustion which should, i would think, increase efficiency.

your stock system should be fine if its working correctly

[SirKeats]

lol... yes. i realize it should be fine. as should all the other stuff we change on our cars before we change it assuming it's working properly before we change it.

we're all here though because we enjoy tweaking our cars for max efficiency. thus the question.

[nickblair]

I did it for a mazda mx6 once, not a metro...

it helps the "speed demons" accelerate faster by decreasing the chance of having the O2 sensors tripped leading to a strangled fuel injection

I'd save a little time and busy work and just skip it, but that's just me

[getnpsi]

Extra oil in the combustion chamber lowers the effective octane of your fuel. So for example if you are trying to bump your timing to the ragged edge for mileage and power gains and are pinging, removing the blowby oil may help before you back the timing down or choose the next higher grade of fuel. Out in California the best gas we get is 91 octane so I put a catch can on my turbo'ed car.

[SirKeats]

ya... i'm having a hell of a time figuring out how to best route the hoses and such. things are just so tight down there. wish someone else had done this before on a metro so i could just copy their setup. LOL. guess i'll just have to go it alone!! hehehe

[whatthe]

Just slap the catch can inline and use it as an oil separator.

Don't vent PCV to atmosphere as it will longer pull a vacuum. The purpose is to increase pressure differential accross rings and help rings seal, reduce blow by, etc.. Autozone/Partsource or what have you sold those crappy PCV filters and everybody used them... they would have decreased performance compared to factory or a proper system.

[MooNShiNeR]

What I did was pipe everything over to the right side of the engine compartment and put my PCV catch can there. I used a 2 1/2" pvc pipe with rubber plumbing caps on the top and bottom. Put the inlet line down to the bottom of the pipe and the outlet near the top.

I used silica alumina and zeolites (both catalysts) inside the unit. The zeolites act as a molecular sieve and break down the hydrocarbons from long chain into short chain. That's what the professionals (oil refineries) use to achieve a 41% increase of petroleum cracked into the gasoline range from the same amount of crude oil.

You need to pipe out of the valve cover outlet to the can and down to the bottom of the pvc pipe as mentioned. Then out of the pipe near the top and then you will have to put a tee into the line to go to the air breather and into the regular PCV valve.

HTH,
MooNShiNeR

[Johnny Mullet]

A catch can serves the same purpose as a breather. It really is not needed unless you have a blow by issue.