ashtray

iTrader: (12)

UPDATE! MY INSTALL ON PAGE 4!

What do you guys think? I cant find any spec. numbers on how much they really help or dont help. Let me know what you guys think. Thanks for all your alls participation.

Ashtray-

texan_176

iTrader: (5)

If it was really required and the injesting of an oily vapor was very harmful to the engine then it would have been factory installed equipement. $100K+ cars in most cases do not come with such a device so I lean on the side of it being snake oil.

BUT..if you must have one you can build your own for under $10.

http://www.angelfire.com/my/fan/Catch_can.html

IMHO it's a bit less stupid than this product:

http://www.turbowhistler.net/blow-off-valve/index.htm

HeisLegend

I've seen beer bottles as catch cans.

Like the poster above said, just make one.

See if Autowerkzcan fab you up some stuff, broham. I'm not sure if he has a dude that fabs up things like that but you can try.

MIGS

iTrader: (15)

it's useless unless your car is boosted. i wouldn't worry about it.

1siksc

iTrader: (8)

Catch cans are used mainly to get the nasty oil that is blow backed into you intake manifold and intake pipes... or atleast that's why I use them. If you have ever tooken apart a vehicles intake and noticed it was really dirty it's from that n/a cars can use it aswell, my stock intake was covered with oil from over the years of use.

ashtray

iTrader: (12)

I get what your saying about it really being required or not. i am not going to make my own one though lol that looks so hilarious.

Ill check out Autowerkz..thanks for that.

I am weeks from being boosted..you think i should lean towards it? i got the cash so im considering it.

I think im gonna get one lol



Anyone else care to share opinions please do! pics are also welcome if anyone has..this forum is full of pic junkies:P

pioww

a catch can is only necessary when the pressure in the engine approaches the atmospheric pressure. In other words when the pressure of the air inside the engine become greater than the pressure outside the engine. In the engine meaning crank case not combustion chamber. High rpm and/or increase charge pressure contribute to it. It depends on many variables. Even N/A cars can pick up power and efficiency with a vacuum pump. to reduce that pressure.

Oil going inside the combustion chamber from excess crankcase pressure can contribute to detonation.

In general if you are reving past say 5700 or using charged air in excess or close to atmosphere pressure it could an advantage for you.

I guesstimated on that number, this is my general opinion worth 1 cent.

ashtray

iTrader: (12)

and by detonation you mean?? blow up? im just gonna get one.

Luxor

iTrader: (15)

Yea, don't worry about it unless you are boosting.

booja

iTrader: (1)

for a stock car no. if youre boosting and creating alot of crank case pressure then yes. your car will be blowing out crap and your intake will be sucking in a bunch of stuff. a good catch can that is baffled inside will catch the oil so your intake will only suck up vapors and not oil.

in my case i didnt have anything hooked up at all and i think i popped my front main seal because of it. too much pressure built up

ashtray

iTrader: (12)

Yupp. I'm getting one. I'll post pics of the one I do get and once installed I'll also show that.

ishootstuf

iTrader: (1)

I was running one to help try to keep the oil out of my MAF, but I filled it full of stainless steel shavings to help catch the oil, and I made it too restrictive and I'm not running it anymore.

KingSoarer

Turbo cars = yes

Using a breather is a very very good idea, illegal here in Australia but still worth it. If you have a 1JZ then make sure the size of the fittings is 19mm - 22mm as all the Greddy ones are around 14mm and therefore very restrictive.

jcat_350

with a boosted motor you want something in place to separate the oil from the intake air. If you're sucking oil into the turbo or even the intercooler you're hurting performance and likely damaging equipment.

On an N/A motor? probably not so much. Being in vacuum doesn't draw much oil, but when you're boosting above 5psi it pushes a ton of oil in there.

My 98 cobra had a procharger p1, running 9.5psi with no oil separator, and I used to be able to see the motor oil in the inlet of the supercharger.

ashtray

iTrader: (12)

That about narrows it down for me. Thanks.