iyaayas12

No just the bottom of the intake tube to prevent and debris from entering the intake. The by-pass valve pushes air out to bleed off positive boost that's built up so it would push debris out.

Nixtang

Do you guys notice that the engine is much louder during warm-up without the tube installed - maybe for the first 10 seconds after you start it?

iyaayas12

Yes mine does the same thing

motorboatingsob

Thanks, this works really well and I put the http://www.jegs.com/i/Airaid/028/770-137/10002/-1 airraid filter on the BOV just for good measure.

motorboatingsob

Go to home depot and ask for the leg cushions for the bottom of chairs. they will take you to these caps that look like the end of crutches. They sell a black and skin colored rubber cap packages for chair legs that if you buy the 1 1/8" ones work perfectly. the cost is about $2.40 for a pack of 4 of them.

Werlebird

Why put it on the BOV end ? That expels pressure doesn't it ? No a vacuum?

TJPlatinumEB

Its an extra precaution to put a filter on the outlet of the BOV to keep any debris or anything of that nature entering into the IC plumbing. Probably not a very good chance of it getting in there, but precautious none the less.

motorboatingsob (LOVE that name btw) thanks for the input on the chair rubber caps. I'll look around for them next time I'm in there

motorboatingsob

you got it thanks.

papa tiger

You have a map system. I would guess some condensate will be also eliminated/reduced as the closed loop no longer exists. Legal where you are?

angel2167882

When I unmounted my CAC the first time to check for water accumulation, I knew the 13+ had the BOV on the CAC out but gosh I was surprised to see the BOV being recirculated into intake... and I also found 1oz of water after only 7000km.

Here's my thread with video and pics:
https://www.f150forum.com/f70/water-...emoval-248485/


I can see 3 main reasons why the OEM setup recirculate BOV output to intake:

1. Keeping toxic vapor emissions from PCV, turbo oil leak, etc inside
2. Keeping BOV noise low for mrs everyone
3. Prevent water ingestion because BOV port is pretty low from ground in case of driving into water deep enough...


Well, I'm not concerned too much about emissions because we don't have annual test here and anyway, IMO they would be so negligible... nothing vs people who remove their catalyst for exemple.

IMO it would also help expel and vaporise to air the accumulation of cocktail at the CAC bottom. And I don't mind more BOV noise at all either


But I'm afraid of #3... Is anybody here has driven into large/deep water puddle since their mod ?

After all, this truck should have some off-road capability right

We are having flooding all around Quebec right now due to late snow melt and lots of rain and you never know... This is also why I don't want to drill the hole in the CAC bottom.

Yeah you can say it's always under positive pressure but I won't take either of thoses risk.


Maybe I could retain the BOV pipe plugged at bottom all the way upper but that way, the tube would act as a slide if water/condensation *could* accumulate and drop down right into the CAC when the BOV would open... not good either.


My plan is to get 1" 1/16 tubing and go up as much as I can (airbox level at least) and make a J shape out facing down... or even bring the tube to airbox prior filter of course.

Of course BOV intake port would be blocked just like this mod.

What do you think of my plan ?