Crankcase ventilation directly to atmosphere? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Kingtal0n · 04-27-2014, 02:13 PM

Or avoid a catch can all together. A catch can is only for when the engine explodes magnificently. Otherwise, its just "extra plumbing" that will lower the overall pressure drop experienced by your crank case.

If your engine produces so much vapour oily mess that you actually require a catch can just to run the car, then either you rebuilt the engine wrong (typical, actually) or it's very high mileage and nearing the end of it's service life, or the rings are toasted from poor tuning. Or there is an issue with a check valve.

edit: spelling

04-27-2014, 02:13 PM	#6
Kingtal0n Post Whore! Join Date: Jul 2005 Location: South Florida Age: 42 Posts: 4,829 Trader Rating: (17) Feedback Score: 17 reviews	Or avoid a catch can all together. A catch can is only for when the engine explodes magnificently. Otherwise, its just "extra plumbing" that will lower the overall pressure drop experienced by your crank case. If your engine produces so much vapour oily mess that you actually require a catch can just to run the car, then either you rebuilt the engine wrong (typical, actually) or it's very high mileage and nearing the end of it's service life, or the rings are toasted from poor tuning. Or there is an issue with a check valve. edit: spelling __________________ 5.3/4l80e/turbo 240sx playthrough: tinyurl.com/4l80er Last edited by Kingtal0n; 04-28-2014 at 10:43 AM..