Why doesn't Ford (and most other Car Manufacturers) use catch cans?

Asked by May 22, 2016 at 04:27 PM about the 2015 Ford F-150 Platinum SuperCrew LB 4WD

Question type: General

I'm against using a catch can on my vehicles. Just curious why Ford, and other manufacturers, don't use them?

6 Answers

83,265

Clarify "catch can" if it is what I am thinking it is they are not DEQ or CARB approved.

This is the website for a catch can supplier: http://www.uprproducts.com/

83,265

Those are different than the others, but it still doesn't say emissions approved, this it strictly racing tech, designed to keep oil splash out of the intake runners via the vent port for the crankcase breathers during high RPM's and engine loads when blowby is at it's highest.

Thank you for your answer! They are also claiming that intake valve coking is reduced with DI. They are counting on combustion vapors, and oil vapors will condense in the cans. The problem I have, when the cans get hot, condensation of these vapors are going to be drastically reduced, and these vapors are going to enter the intake anyway. Any comments? Thanks again!!

83,265

They figure that by that time they will be reduced enough that they will be burned with out a problem. But I would not use the stock entry port for the vapors, I would try to find or even drill and tap another fitting more to the center of the manifold just for the vapor, this will keep it out of the throttle body and there should be a cool down time and a shut off so the vapors that are not fully pulled out stay trapped until the engine is fired back up and is at operational temp before it is opened. Just my thoughts on this, I never had a problem with oil splash in my old racing days, everything was vented outside through a draft tube, man that sure dates me.

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Thank you for your technical information!

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