I am debating on installing an oil catch can on my 2005 ls430 i occasionally track the car, it is a NA set up. I was wondering who has first hand knowledge with an oil catch can on a NA set up. I know for forced induction motors they are a must but what about NA, i am looking forward to your responses.

 

I think nay, only because I don't think there's an issue? I know on direct injected motors there's an issue because fuel never comes in contact with the intake valves...even though I'm not necessarily a fan, I bought Techron on sale at Costco, so around each oil change, I pour it into an almost empty tank. then fill, thinking I did a little something for the car (have not seen any benefit)...

 

Well, contrary to other opinions, there is some benefit to having a catch can installed. Primarily to keep oil from going through the intake, and gumming up the throttle body and intake valves. Not as much of an issue with normally aspirated cars, as opposed to turbo charged cars, but it would keep the intake cleaner.
The biggest problem with catch cans that I see, is people wouldn't normally take the time to clean a catch can out, if it were installed on cars from the factory. So, the easiest solution manufacturers use is the venerable PCV valve. Works every time, all the time. Unfortunately, it does introduce oil back into the intake, and if you are thrashing the car around, you run the risk of picking up more than just a few drops of oil.

I say install one and report back on the results.

 

I ordered one good sir i wont be driving the car till spring, my cold air intake duct and heat shield will be done on friday the coupler will be here on friday.

 

Can't wait to see the final result...