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I have an 07 Coupe and have been wondering how to tell if you really need the oil catch can installed. This car has a mild street cam and tune and gets a little spirited high rpm runs every nbow and then. any help will be appreciated..Thanks VNVETT
When I installed my ported manifold, I saw oil on the bottom of my original manifold. Some oil had dripped into the portholes. That's when I bought a catch can.
had a big cam in an ls1 drove it for 115K and never had a catch can on it, never had problems.
Some have it worse then others, and a lot of it also depends on the driver. Your intake manifold will be coated with oil, which considering a lot of people port and polish for performance, it's not exactly going to help the situation. The stuff coming in also isn't just oil, but other nasties as well. Anyone who has emptied out a catch can will tell you that the stuff that is in there, you'd never want in your engine. It will go into the combustion chamber and lower the octane rating of the fuel you are using by mixing in, as it's not exactly something made to be burned in the engine. I hope that helps.
Some people might never see an issue, and some people might.
The Catch Can is an option and not a requirement. Like a CAI, Headers, Tunnel Plate, CAM, etc.., not a requirement but an improvement over stock, eliminating some of the atomized oil ingested by the Ls engine.
My Z06 sports a Billet Prototypes can now(Thanks Jamesbiz). You don't gain any performance out of it, but you can sleep better knowing your engine will stay cleaner for longer on the inside.
The main issue with the oil in your intake stream is the eventual deposits in the combustion chamber. This will create "Hot Spots" on the top of your pistons which will cause KR, reducing timing, and consequently power. A catch can is the minimum that you should do.
I have a rev-extreme catch can and it is absolutely amazing. I pulled my intake manifold off at 15k miles and wiped the inside of it with my finger and there was almost 0 residue on my finder. I was absolutely amazed.
The main issue with the oil in your intake stream is the eventual deposits in the combustion chamber. This will create "Hot Spots" on the top of your pistons which will cause KR, reducing timing, and consequently power. A catch can is the minimum that you should do.
The reason I installed one as soon as I got the car home from the dealer. I empty every 1000 miles or so, and usually get 1 to 1-1/2oz out.