Was just curious if any of you guys run a catch can on the p-car motors

 

What exactly does a catch can do? I have no idea what it is.

 

"Engines are prone to accumulation of an oil sludge mixture forming inside the intake tract due to crankcase pressure and inefficient combustion. And although oil in the intake track is normal it can reduce engine performance.

The oil catch tank will hold the oily byproduct by removing it from within the air intake stream. By doing so, horsepower is increased by eliminating the engine’s current requirement to try and burn this relatively non-combustible oil. Engine life is extended due to this oil not having the ability to gum up the valve train and other moving parts and sensors."

 

No, but I do use a fart can.

Craig

 

That is funny!

Anyway, is this something that the Turbo engines would benefit from? I can't seem to keep a quart in my engine for longer then about 1000-1500 miles.... I burn a quart in that time.

 

I run one on my 99 C2. I would have assume anyone serious about power would have already done this. However, it is illegal. not to complete the routing to the intake.

 

Where would something like this be installed? I am serious (not as much as others) about power but have not heard about this for Porsches. None of the tuners have anything listed like this for an upgrade. Thanks for any info.

 

well, I'd suggest that your PCV system relies on negative pressure from boost in the intake to evacuate the oil you are speaking of (ie..what blows past the rings)...catching it in a can is great for racecars, but very inefficent for street cars and you will see no performace gain or benefit. cleaning your pcv valve would provide greater benefit...since the majority of the pcv gases are unburnt hydrocarbons mixed with a small amount of oil, it all burns just fine when spit back into the intake.

-dw

 

You will never get a tuner to install one that does not return the gasses to the intake system as they would be breaking the law. Having the gasses escape to the atmosphere like the old vents on the valve cover did, greatly reduces the intake temperatures as well as remove an octane reducing efect the oil fumes have.

Think of it this way....of your total volume of air allowed into the intake, the crankcase gasses account for more than 15%. So, if your air temperature entering the intake is 70F and the crancase gases are 200F, there goes some horsepower.

 

you can have a catchcan that still vents to the intake but catches the liquids (oil)..they don't have to vent to atmosphere. But my point above was that there would be no gains...

There is no way that on a 996TT that crankcase gas = 15% of total intake volume, especially under boost. Its a very small figure.

-dw

 

So where would something like this be installed.

 

the majority of mods being done are "illegal" I know of many tuners that provide and install these on V8's

 

here is an example of one on a LS1

 

I don't think most would install this looking for more horsepower, but to get longevity out of the motor. What are your thoughts on that aspect? Do you see any negatives to a catch can?

 

There are no negatives to a catch can.

Burning a quart every 1000 miles or so is unacceptable; I'd suggest a catch can in that instance. That's a LOT of oil being burnt

Burning excessive oil will decrease the life of the engine; by how much is the question though

Every motor's different, and turbo motors have harder internals than an LSX-based motor does. Unless you have a high consumption of oil I wouldn't worry about it, but if you plan on keeping the car for over a 100K miles modified then one might consider a catch can.

The mileages I've stated are loose estimations since, to my knowledge, noone has ever tested the wear&tear on a modified turbo motor that burns oil over 10's of thousands of miles.