EVO CAI installed - What do I do w/ Breather Line??

Manny was kind enough to give me a great deal on his EVO CAI. I have it installed, but don't know what to do with the breather line that was on the original stock intake. (I have a tiptronic) Do I just cap it off? And can I find a suitable cap at Kragen? Thanks, A

hmmm, pics?

Here is a straight on shot. The breather line normally connects to the left side of the plenum intake hose from the air filter.

do you know where that hose come from?

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The breather line is inserted into the left side of the OEM rubber hose near the throttle body, across from the MAF. It draws in fresh filtered air. It has pretty strong suction. I have no idea where it goes or what it is for.

that shiny hose going into the throttle body above it comes from the crank vent... and just wondering where this loose hose is venting from. depending where that breather line originates, I guess you can tap into the crank vent line...

Why tap? Just buy a breather tube filter... like a smaller cone filter, from an auto-store. BTW, you should sell the intake to me since you have "extra parts" and it doesn't work on your car. hehehe

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Ahhh, good idea! Nice try, but I'm already getting addicted to the better pedal response

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I had the same problem when I installed an EVO CAI on my X-51 engine. Apparently only the X-51 engines and the tiptronics have this. EVO MS sold me a new "ventury tube" with a connection for the breather line for around $45. If you order it new from EVO, as part of the ordering process they ask this question, and send you the correct version

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problem with cone filter is once they get oil saturated, they tend to get messy, if you dont replace them. I like Christians method best.

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Thanks Christian! New tube ordered for $55. mystery solved.

Aaron....glad you were able to order the correct part. funny, when i ordered it directly from evoms they did not ask whether is was manual or tip. they do not even mention it on the website.

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Manny, Yes, it's weird. That tube seems to the the red-headed step-child. I vaguely remember seeing a pic of it somewhere in the past, but couldn't find it online this time. So far I'm noticing better pedal response, and less e-gas lag. The sound actually got smoother, but no louder than the BMC. I'll post final pics and eval when I get the new tube. Thanks Again!

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It's because they think: "Why in the world would anyone drive an automatic Porsche?!"

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It's just a breather hose, not an intake. It's just there to equalize pressure, not as a line for a high flux of air. Regardless, if the proper part exists for proper tap, that's the better way.

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I know, I know, but LA traffic turns pleasure into pain REAL quick.

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They are pretty smart. Who can argue with that! Oh, sorry Nicolaas!

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Man, I'm glad I didn't include the part about having to get a tip to keep the wife happy.....ooops.

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Yeah!

Guys, I just installed a Fabspeed intake with the red tube on my Tip C2. I also have this breather line that I do not know what do do with. As shown by Christian above, it appears that Evo and K&N have Tiptronic solutions for this extra line. Fabspeed does not. I called them and they said that I could do one of the following: 1) Put a breather tube filter on it (as suggested by Arnee). If I go this route, can somebody help recommend what/where to buy? 2) Drill a hole and put a grommet in the Fabspeed tube and tap the line into the red tube. I prefer this solution as this would be equivalent to the Evo solution above but I have no idea which parts to buy, how big a hole to drill, etc. etc. If somebody can give me some suggestions, I'd really appreciate it. Thanks in advance!

Since the fabspeed hose is a silicon hose, you can just tap into it without any other issues. I suggest doing that.

John, Maybe some of the other guys can be more specific, but basically you need a plastic nipple similar to the one on the breather tube. Punch that thru the silicone tube and secure it. Then get a small length of vacuum hose and connect the 2. I would think most of these things could be found at Kragen. Good luck.

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Yes, that's what I would like to do but specifically how? How big a hole should I drill; how do I connect the breather line to the silicon hose (what parts and where to buy)? As you can see from medtech's photo in the thread, that breather line doesn't quite reach the hose. On the OEM hose, there is connecting elbow hose that reaches out to that line. I brought both the OEM hose and Fabspeed red hose to Kraegen Auto today and told them what I wanted to do and they were no help at all so I'm asking the experts here.

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Yes, I can visualize what you are saying in my head and tried to explain this to Kragen but the guy I talked to was clueless and basically told me they don't have such parts and that I should go to the hardware store. I find that hard to believe. If somebody can be more specific or have done this before, I could really use the help. thanks.

Use the terminology of "vacuum hose couplings" Will be plastic looking, or nylon, or poly. Looks like this: or this Found HERE Just match the ID of the breather tube to the OD of the barb. I'd use a little sealant, maybe silicone, on the intake side to assure a good seal and prevent leaks. My local Autozone has all kinds of these, or try like you said any local hardware store. HTH

Went ot Autozone today and bought a pre-molded rubber hose that included a 45 degree bend. The hose has a 3/8" inner diameter to accommodate the factory vacumn line. I cut the hose and left about 1-1/2 inches on both sides of the bend to form an elbow connector, then drilled a 1/2" hole in the red Fabspeed tube. I plugged one end of the elbow connector into the hole in the red tube, sealed the connection from the outside with some silicon adhesive and plugged the vacumn line into the other end of the elbow connector. Attached photo shows the finished result. I hope the solution holds up. Thanks to those who offered helpful advice and made me brave enough to attempt this DIY effort.

John, It looks pretty good. I would watch it over time and make sure it doesn't vibrate loose. If it does I would go with a plug connector like Anderson suggested. Quite frankly, for what you payed for it, it kind of annoys me that Fabspeed doesn't take a more active role in finding a solution for you, but that's another story.

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Yes, I would have preferred to build something more solid like Anderson suggested but Autozone didn't have the right parts so I ended up with what I had. In fact, I would've preferred not to tinker with these homemade solutions at all. If Fabspeed would just sell me a kit to do this minor mod, I would've gladly overpaid just to know that I got something true and tested.

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Agreed. Anderson put a link in his post so you can order the part online. My concern is that the silicone could break loose over time and get sucked into the engine.

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Med - what is you take on your CAI? Other that increased intake sound, do you really notice any difference in performance?

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Tim, Honestly, I don't think it's any louder than my stock airbox w/ BMC filter. The sound has also smoothed out a bit. It's less growly now (not sure if thats a plus). What I have noticed is less E-gas lag in the lower RPMs. I just put the new tube on yesterday, so I'm still waiting for the computer to adjust and learn. When you factor in the cost difference, $80 vs $600 (new), it's really a close call. Aaron

I'll give ya $80 for it.

Aaron, thanks to the feedback. I have never been convinced that adding an aftermarket CAI was worth the money. I am not trying to rain on anyone's parade, but even if it added 10 to 15 HP (which I doubt) would anyone be able to notice or "feel" a 3% to 5% gain in power? I guess I am just skeptical that Porsche would intentionally leave 10 to 15 HP on the table. I won't even go into some "oiled" air filters that can destroy the MAS. Hell, the 26 HP that is gained by adding the Carrera power kit (X-51) costs $16,000 when ordered from the factory. Is that too costly, yes I think it is, but Porsche can get it from a few people. Just one man's opinion on CAI. Take it for what it is worth to you.

I would have to imagine that most everyone on this board considers the CAI a audible improvement only; no appreciable gains. You have to keep in mind that even with the X51 kit, Porsche doen't modify the stock 996 air box. Ponder that one. I wouldn't mind a little more growl, but certainly not paying $250 for it. Even if I could find one used, the red hose I'm not in love with; and yes, there are vendors who sell lengths of 3.5 or 4", 3 and 4 ply black silicone hose, but its not fun to work with [difficult to cut cleanly]. Is the BMC filter a dry one? Anyone have a link handy?

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The BMC is lightly oiled to dry. I think it works great. PM sent. Personally I think the red tube is a joke for $250. If someone is in love with that idea, Schnell makes a cheaper version ($125?), but still. In a NA car I would go with the stock/BMC setup hands down. Unless you can get lucky and find a good deal on a used EVO CAI, (thanks Manny!). The EVO CAI is a nice unit, looks good, and a little better performance than stock/BMC, but not $500 better IMHO. Also, I may be a tard, but I can't figure out how to safely get the cone filter out of the EVO. Not sure how much I can bend it, but it's a darn tight fit.

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Rrrrriiiigght....

Anders0n, You bring up a great point about Porsche not altering the airbox. I have watched all theses CAI threads with interest, trying to determine the value of opening up the airbox a bit. I have a stock race car and cannot alter the intake tube, but I can't help but think that getting more fresh air down there would be beneficial in a race application. Without real data, I gotta believe that opening up the small square openingon the left, or adding something on the right would help. Geting a couple of HP at the redline is very helpful. Has anyone seen, tested, or fabed a higher volume airbox to work with a stock intake? Sorry if this hijacks the thread.