Elite dual valve Catch Can with AFE intake Question

CDNSS · May 9, 2017

I have a dual valve catch can installed on my 2017 6.2 currently installed with the stock air intake ..............so drilled a inlet and installed fitting in top of air box just infront of TB

Now installing AFE intake ....... it has a nipple for the CSS just like stock box ......the other nipple is closer to filter on side of tube

can I hook up the second line to this nipple ?? will it work that far a away from TB ??

or should I drill a hole on top in front of TB on the AFE tube like I did the stock intake ???

camcamaro1991 · May 10, 2017

CDNSS,

I have found during my testing there is too much vacuum at idle (created a suction noise for me) from the valley cover/LOMA (Lifter Oil Manifold Assembly) when using the oil catch cans, when running it from the LOMA and Valve covers, as there is 2 different vacuums present depending on load. I don't use the CSS separator, I have it.. but after looking at it I was like no and blocked off the 2nd side on my catch can, I might just add another can for the valve covers to the airbox to combat my paradox lol, or just reuse my 2 outlet system and buy another single can for the LOMA to aft TB.

and truthfully the new valve covers actually have a CSS built into them to a degree.

I believe UPR does the way you are asking, but meh.

CDNSS · May 11, 2017

Interesting is this with the factory airbox or aftermarket inlet tube ??

, so f I understand you correctly you are saying the high vacuum created in front of the TB in the airbox for the CCS and the 2 nd inlet creates a whistle sound which would be annoying for sure

Currently I have my 2nd valve connected to a fitting right in front of TB and CCS connected to the factory airbox nipple on drv side and do not have any issues with whistle or hose collapsing etc

My question really is if I connect the 2 nd line to the nipple on the AFE inlet tube that is upstream ( pass side that you typically plug ) from the TB will there be enough vacuum there to pull the clean air into the TB from thje can or do I have to install a fitting in the tube right in front of TB like I did the stock airbox ??

camcamaro1991 · May 11, 2017

Interesting is this with the factory airbox or aftermarket inlet tube ??

, so f I understand you correctly you are saying the high vacuum created in front of the TB in the airbox for the CCS and the 2 nd inlet creates a whistle sound which would be annoying for sure

Currently I have my 2nd valve connected to a fitting right in front of TB and CCS connected to the factory airbox nipple on drv side and do not have any issues with whistle or hose collapsing etc

My question really is if I connect the 2 nd line to the nipple on the AFE inlet tube that is upstream ( pass side that you typically plug ) from the TB will there be enough vacuum there to pull the clean air into the TB from thje can or do I have to install a fitting in the tube right in front of TB like I did the stock airbox ??

I would follow the factory PCV system layout, that's what I did. (the suction noise for me didn't happen at first, vehicle had to warm up) I noticed it was suction noise, almost like the sound of sucking air past a oil seal (it drove me nuts I went looking for a leak from my install....), when I took the oil cap off it remove (was difficult to remove under the higher vacuum) the noise stopped instantly that's when I knew I had an imbalance.

Newly designed DI valve covers. Notice the baffling/oil drain back provisions. GM Really stepped up their game here (to a degree the new engines already have a CSS built into them) my tubes from the valve covers to the stock air box is dry as of 2,500 miles now. However my oil catch can works great, pretty sure we can catch more if I move my catch can to a cooler place inside the engine bay, or near the grille working out the problems with draining it for the maintenance side of it, maybe front driver forward fender area behind the bumper.