Quote:
Originally Posted by celica73
Why use one at all? I really don't think these cars have a major oil blow by problem.
If the rules don't say that you can, then you can NOT.
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Crawford posted some pictures of a torn down engine with like 5K miles on it (not a failure, they tore it down for development) and the pistons showed a lot of black deposits on them which they attributed to PCV crap in the combustion chamber. AVO also maybe had some evidence of oil condensed in the throttle body when they removed the stock intake tube and put their silicone hose on.
http://store.crawfordperformance.com...ploads/800.jpg
So now everyone is racing out to buy catch cans. There are a few guys who have installed catch cans and have seen no oil in them even after track days, so it's not blowing oil like a turbo Subaru but PCVs do put crap back into the intake. The Crawford is an air/oil separator so it will condense the crap in the vapors as well.
The rule is:
"The installation of oil catch tanks is allowed provided the function of the PCV system is not altered." So as long as you are just plumbing things inline, then it's legal. You can't dump the outlet under the car.
AOS would be legal as well, it does function as a catch tank, it just happens to drain back into the engine. Rule doesn't say anything about drains...