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A lot of us know what a Catch Can is and what it's purpose is for DI engines.
My question is do you really benefit from a Catch Can when you are mostly in WOT, or tow a lot and your RPMs are a little high for a constant amount of time?
If your driving your truck like Mrs Daisy, would a Catch Can still be appropriate for you?
Floridaguy80 ... My question is do you really benefit from a Catch Can when you are mostly in WOT, or tow a lot and your RPMs are a little high for a constant amount of time?
During those times MORE PCV fumes are created.
If your driving your truck like Mrs Daisy, would a Catch Can still be appropriate for you?
Would/could still be appropriate depending upon how **** you are about PCV results being piped into your intake.
A lot of us know what a Catch Can is and what it's purpose is for DI engines.
My question is do you really benefit from a Catch Can when you are mostly in WOT, or tow a lot and your RPMs are a little high for a constant amount of time?
If your driving your truck like Mrs Daisy, would a Catch Can still be appropriate for you?
::fire retard suit is on:: LOL
Good question, the design of the direct injection engines in most modern cars that use it don't have the proper evacuation system in place. This means whether at idle, deceleration, WOT or boost you have foul vapors present. They then settle and collect on the valves which is considered valve coking and carbon build up occurs. No one has to have a catch can but if you want to extract the unburned fuel, oil, water and sulfuric acid it's not a bad idea. Clean valves are better than crusty coked up valves for volumetric efficiency etc. necessary for fuel economy & power. You only want fuel in the combustion chamber not the other compounds for quality burn.
These images are off of a vehicle with 12k miles we did a manual valve cleaning on a week ago.
Without a catch can oil is getting into your intake manifold, with a catch can less but still oil is getting into your intake. Doesn't catch it all, but does catch some. I recently traded my mustang with the 5.0 in on my truck. When I was doing all the work to it I saw what the motor looks like from the oil getting in. And it's not pretty. So I then plugged the intake side and put breather filters on the pcv's. Looked good, worked good, absolutely nothing negative happened. I didn't get oil all over my engine bay, it didn't smell, and my intake ports stayed clean. Boosted motors are different. Vacuum is good.
Let's see some pics of a brand new, zero mileage truck with a catch can that has been on it since day one with 20k miles on it.
Originally Posted by RX Performance
Good question, the design of the direct injection engines in most modern cars that use it don't have the proper evacuation system in place. This means whether at idle, deceleration, WOT or boost you have foul vapors present. They then settle and collect on the valves which is considered valve coking and carbon build up occurs. No one has to have a catch can but if you want to extract the unburned fuel, oil, water and sulfuric acid it's not a bad idea. Clean valves are better than crusty coked up valves for volumetric efficiency etc. necessary for fuel economy & power. You only want fuel in the combustion chamber not the other compounds for quality burn.
These images are off of a vehicle with 12k miles we did a manual valve cleaning on a week ago.
02-18-2015, 09:39 AM
Catch Can question
