[markblackwell]

Originally Posted by PRAY

Don't forget about cam overlap. The stock cam has overlap when you use seat to seat timing. So, no catch can will keep all the crap out of your intake ports. During the OL event there is reversion and unburnt gasses containing oil will enter your intake port. With out port injection that crap will get stuck to the hot side of your intake valve. Now, if you add a cam with say 23* of OL @.050" the problem will only compound itself. I believe in catch cans and run them on everything but you will never get completely clean intake ports or valves on a DI motor.

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