Rocker cover filtered breathers.

[panic]

Who's selling rocker cover's filtered breathers for RV8? I want to dump the connection from the rocker cover into the intake...is there any other adv/disadv? Thanks/G

[steve-V8s]

You can use the standard breather flame trap. Go to a pluming shop and get a 15mm compression fitting right angle pipe joint. Put a short length of 15mm tube in the other end and then get some 19mm hose ( Halfords sell it) and run to a catch tank. It is best to get a second flame trap and do both rocker covers with separate pipes. The flame trap is a standard land rover part and screws in place of the oil filler.

Disadvantage is the normal system sucks the air out so arguably is removing corrosive deposits from the crankcase, if you just breath to a catch tank they have to find their own way out.

[GreenV8S]

Crank case vapours contain oil vapour which has a very low octane rating so it's worth getting rid of the PCV system if you're struggling to pass an emissions test, or if you're going for max power and trying to avoid detonation. You would need to disconnect the existing breather connections to the throttle body (and seal the throttle body openings) and then route the breather to a catch tank with its own vent. The catch tank would need draining from time to time, unless you fit a self-draining connection back to the crank case.

[panic]

GreenV8S said:

Crank case vapours contain oil vapour which has a very low octane rating so it's worth getting rid of the PCV system if you're struggling to pass an emissions test, or if you're going for max power and trying to avoid detonation. You would need to disconnect the existing breather connections to the throttle body (and seal the throttle body openings) and then route the breather to a catch tank with its own vent. The catch tank would need draining from time to time, unless you fit a self-draining connection back to the crank case.

I have the sistem you've detailed above in my C3 vette, but both breathers are filtered and vent freely into the engine bay, not in a tank.

Actually it's vapor but I see no oil around, unless it's so minimal that it get cleared away by the wind?

[GreenV8S]

panic said:

Actually it's vapor but I see no oil around, unless it's so minimal that it get cleared away by the wind?

It should be *mostly* water vapour plus some weak acids, but it will contain traces of oil mist and occasionally might contain substantial amounts of oil depending where the breather outlet is and how well it's protected against splashing. The point of the catch tank is just to stop the oil splashes to avoid a potential fire hazard, oil on the track etc. What sort of filter are you using? A conventional air / vent filter would clog fairly quickly when exposed to oil mist.

[panic]

GreenV8S said:

panic said:

Actually it's vapor but I see no oil around, unless it's so minimal that it get cleared away by the wind?

It should be *mostly* water vapour plus some weak acids, but it will contain traces of oil mist and occasionally might contain substantial amounts of oil depending where the breather outlet is and how well it's protected against splashing. The point of the catch tank is just to stop the oil splashes to avoid a potential fire hazard, oil on the track etc. What sort of filter are you using? A conventional air / vent filter would clog fairly quickly when exposed to oil mist.

The breathers come with the filter built in, I don't know what kind it is but it's pretty good, anyway I change breather and filter every 5.000 miles or so.

You can eat in my engine bay, it's as clean as it comes.

[GreenV8S]

panic said:

You can eat in my engine bay, it's as clean as it comes.

That's always a very good sign!