im not really interested in one of these...but i keep trying to figure out where the hell you would hook up one of these things on a rotary engine....i keep seeing them on ebay but i just cant figure out where they would hook up.....i mean, ive seen them on other cars before, but where would you connect this to a rotary?



eh random thread

 

SEARCH!
Oil Filler Neck>Catch Can<Intake

 

Jeg's has a REALLY nice catch can by Jaz that's designed for go-karts. VERY small, has 2 inlet nipples, a breather filter on the top, and a petcock at the bottom to drain it. Had one on my 10th Anniversary - all the blow-by went into the catch can, not back into the intake. Every now and again you just open the petcock at the bottom and drain it out - even had a fitting for a drain hose so it would drain out into a pan or something and not get on stuff in the engine bay.

The only problem with a full catch can setup is it's not emissions legal - the HKS one you're looking at is. That is simply a can that goes in-line with the stock PCV system - excess oil is trapped in the can and not sucked through the intake tract. Emissions laws state that ANY emissions from a car, even evaporative, must be burned and treated by the cat.

Here's some more info on the Jaz can on an FD -

http://reganrotaryracing.tripod.com/catch.htm

You can get it in black, BTW.

Chris had lots of blowby problems, but again he's bigtime tracking the car. There's lots of factors involved there - the catch can didn't cause the problem, it simply caught what would have gone into the intake.

Dale

 

hehe... you said there's a pet **** to drain the tank with that's just funny.

now on a serious note, why is it that they have all these stupid laws regarding what's allowed to come out of your tail pipe but they won't let you be creative in how to stop it? wouldn't that get us further in the long run?

 

my intake filters kept getting dirty...i was told one of these would help...hmmm maybe i should consider one

 

There's kind of 2 sides to the coin. First, auto manufacturers are under VERY strict emissions regulations - the testing they do to certify a car to be sold in the US is FAR more strict than any state test. They have to have certain cold start emissions, no evaporative emissions, diagnostics to check that everything in the system is working perfectly, etc.

You could very likely pass even California emissions with the whole evaporative system vented to atmosphere, especially if you did the work so it didn't look obvious for a visual inspection. However, Mazda could never have sold the car in the first place if it didn't meet federal emissions standards.

Anyhow, a catch can is a VERY good idea on any turbocharged car. Over time, you'll get oil film on the intercooler pipes and coating the insides of the intercooler, which reduces efficiency. I know DSM guys used to pull and clean their intercoolers with a significant difference in performance.

Dale

 

So with that school of thought it's better to just vent it to atmosphere than connecting it to the intake and inducing vacuum?

 

little vac will help with the oil drain etc.. just a vent would tend to get messy. the can will help seperate the oil mist in the blowby.