K&N Typhoon Intake Review - now with added Pics and Video!

[Kamauxx]

Understood. Thanks!

 

[Black Magix]

So you're findings that "the throttle response is better at lower RPM's and not so much at the higher" is consistent with the Lambda line for me. I installed an R2C CAI to my 2015 Genesis Coupe Ultimate which uses the 3.8L Lambda II RS GDi and had the exact same thing happen. The Genesis Coupe's throttle was suddenly a lot more snappy off a dead start and didn't really have anything going on at the top end.

Now the Stinger GT uses the 3.3L Lambda II T-GDi but it's still the same engine line, I think the cylinders are just a tad smaller..

Yes I used Wikipedia to look up the exact models lol.

 

[NobleCrow]

Did anyone else have a slight issue with the BOV to intake tube hoses not fitting back to your liking? I got them to a point where they didn't twist, but there's a slightly flattened bend on the driver side, if that makes sense.

other than that, everything has been fine.

 

[ZyroXZ2]

Did anyone else have a slight issue with the BOV to intake tube hoses not fitting back to your liking? I got them to a point where they didn't twist, but there's a slightly flattened bend on the driver side, if that makes sense.

other than that, everything has been fine.

Yes: since there's less clearance, the bends of the BOV hoses get "sharpened" a little. It doesn't kink them, but all you have to do is cut off a half inch or so of tubing on each and it'll obviously straighten out the bends. It's not entirely necessary, but I did notice that, too. Since it doesn't cause any problems or affect anything, it seemed pretty moot.

However, the twisting is just a matter of rotational positioning. The paint marks just won't line up the same as they did from the factory, and you can ignore those because the paint marks are just for assembly speed/precision.

 

[ZyroXZ2]

UPDATE:

The nylon plastic fittings that come with the K&N intake are not very durable! Granted, part of the problem in my case is that I had to buy a different hose, and since my hose doesn't come prebent (FYI: prebent hoses are that way to mitigate/absorb torsional motion during driving which serves to decrease strain on fittings from said motions), it means there would be a little more movement against the fitting.

I had noticed my MPGs kept falling gradually on the same trips I make, and I already knew from previous experience that when my ISG stopped working, it fell hard because of all the unmetered air going in through that vacuum line. So, I opened my hood, and checked what I suspected was the weak point, and yup: the nylon fitting was loose and could freely be turned by hand. The ISG didn't stop working, so it was clearly still within the threshold of necessary pressure, but clearly it was a small amount of air leaking through the fitting's threads.

I've since removed it, noticed a single thread in the middle that clearly became worn (the plastic was turning white on that thread clearly due to bending/stretching of said thread), wrapped the threads with thread seal tape, and reinstalled it. It's nice and snug and doesn't move by hand, and my MPGs have climbed back up.

TL;DR: Keep an eye on your nylon fittings. They can come loose.

 

[DanielN]

Do you think 12 x 24" is enough to cover the K&N boxes? I haven't received my kit yet. And was looking at the shielding materials on Amazon: Thermo-Tec-13575-Adhesive-Backed-Barrier

 

[NYLAWBIZ]

UPDATE:

The nylon plastic fittings that come with the K&N intake are not very durable! Granted, part of the problem in my case is that I had to buy a different hose, and since my hose doesn't come prebent (FYI: prebent hoses are that way to mitigate/absorb torsional motion during driving which serves to decrease strain on fittings from said motions), it means there would be a little more movement against the fitting.

I had noticed my MPGs kept falling gradually on the same trips I make, and I already knew from previous experience that when my ISG (Idle Stop and Go) stopped working, it fell hard because of all the unmetered air going in through that vacuum line. So, I opened my hood, and checked what I suspected was the weak point, and yup: the nylon fitting was loose and could freely be turned by hand. The ISG (Idle Stop and Go) didn't stop working, so it was clearly still within the threshold of necessary pressure, but clearly it was a small amount of air leaking through the fitting's threads.

I've since removed it, noticed a single thread in the middle that clearly became worn (the plastic was turning white on that thread clearly due to bending/stretching of said thread), wrapped the threads with thread seal tape, and reinstalled it. It's nice and snug and doesn't move by hand, and my MPGs have climbed back up.

TL;DR: Keep an eye on your nylon fittings. They can come loose.

I am experiencing the same problem - reduced gas mileage and ISG stopped working (yellow when tries to turn on). Yes, the barbed fitting was loose and there was apparent thread damage. I tightened it up and used some thread locking compound. So it seems pretty snug now, but still no ISG working. Going to check the other fitting this morning to see if anything else is loose (I did this already, but I'll check again).

I called K&N and reported this problem. I also told her about this thread and read her ZyroXZ2's posts. She said this was the first complaint they received about this and wouldn't acknowledge that ZyroXZ2 was right (something like anyone can post anything online, that doesn't make it correct). She said she will mail me out replacement barbed fittings, but I don't think that will solve my problem. I asked if it could be referred to their engineers, and she said she will see what she can do but since I am the only one so far to complain to them, she discounting the possibility of a design issue.

If anyone else is having this problem and has any other suggestions or if ZyroXZ2 has any suggestions, it would be greatly appreciated.

Also, if those who have had this issue would report it to K&N, then they will know that my situation isn't an isolated case, and they may take remedial action. Their phone number is 1-800-858-3333 and I spoke to Suzanne.

Thanks.

 

[ZyroXZ2]

Do you think 12 x 24" is enough to cover the K&N boxes? I haven't received my kit yet. And was looking at the shielding materials on Amazon: Thermo-Tec-13575-Adhesive-Backed-Barrier

That might be a tad too small. I bought a "roll" which was WAYYYY too much, but it did give me a lot to work with and I'd rather too much than too little in case there were any errors. I've cut my own insulation before, so it was a little easier for me, but if this is your first time, use some paper to make yourself some templates before you go cutting into your insulation.

I am experiencing the same problem - reduced gas mileage and ISG (Idle Stop and Go) stopped working (yellow when tries to turn on). Yes, the barbed fitting was loose and there was apparent thread damage. I tightened it up and used some thread locking compound. So it seems pretty snug now, but still no ISG (Idle Stop and Go) working. Going to check the other fitting this morning to see if anything else is loose (I did this already, but I'll check again).

I called K&N and reported this problem. I also told her about this thread and read her ZyroXZ2's posts. She said this was the first complaint they received about this and wouldn't acknowledge that ZyroXZ2 was right (something like anyone can post anything online, that doesn't make it correct). She said she will mail me out replacement barbed fittings, but I don't think that will solve my problem. I asked if it could be referred to their engineers, and she said she will see what she can do but since I am the only one so far to complain to them, she discounting the possibility of a design issue.

If anyone else is having this problem and has any other suggestions or if ZyroXZ2 has any suggestions, it would be greatly appreciated.

Also, if those who have had this issue would report it to K&N, then they will know that my situation isn't an isolated case, and they may take remedial action. Their phone number is 1-800-858-3333 and I spoke to Suzanne.

Thanks.

Oh of course they're not going to acknowledge it: it's like admitting they knew about the problem (even though, again, they clearly did because they included two different size fittings). Are you using the smaller fitting, though? It isn't just about the seal, it's about the amount of air flow (or more accurately, the pressure in the line). As I posted for someone else above, put a worm clamp in the hose itself and keep tightening it down to restrict (but not completely block of course!) the flow until ISG works again. That's how I discovered what was affecting it in the first place.

 

[NYLAWBIZ]

I did add a second clamp and reduced the flow to about 50% but still same problem. I have an appointment at the dealer Friday.

That might be a tad too small. I bought a "roll" which was WAYYYY too much, but it did give me a lot to work with and I'd rather too much than too little in case there were any errors. I've cut my own insulation before, so it was a little easier for me, but if this is your first time, use some paper to make yourself some templates before you go cutting into your insulation.



Oh of course they're not going to acknowledge it: it's like admitting they knew about the problem (even though, again, they clearly did because they included two different size fittings). Are you using the smaller fitting, though? It isn't just about the seal, it's about the amount of air flow (or more accurately, the pressure in the line). As I posted for someone else above, put a worm clamp in the hose itself and keep tightening it down to restrict (but not completely block of course!) the flow until ISG (Idle Stop and Go) works again. That's how I discovered what was affecting it in the first place.

 

[ZyroXZ2]

I did add a second clamp and reduced the flow to about 50% but still same problem. I have an appointment at the dealer Friday.

Hmmm, not sure what's up with yours, then. Just for shits and giggles, try restricting it down to about 25%. I know that the change in flow between the two fittings is pretty substantial (if you look inside the fitting, you'll see the smaller one has an even smaller choke inside while the bigger fitting is practically wide open all the way through).

Otherwise, maybe something else is wrong with yours. However, if they scan it and find that it's vacuum line pressure, it really means you may just have to place a smaller hose on it and clamp it down further.

 

[DanielN]

So I used this instead for thermal insulation:
Aluminum & Fiberglass Heat Shield Barrier with Adhesive Backing 12"x39" (3.3 Sq. Ft)

It was just enough to wrap every single side of each box and it was easier to use a box cutter and cut the pieces laying the box on the insulation itself and then I also used thermal tape for the edges that meet together. I didn't have to cut any of the edge trim, I just pulled it tight enough to meet the end. I did have to go to AutoZone and buy a clamp for the ISG hose. The original clamp does not work. Wrapping the boxes and installing took me about 1.5 hours to do.

This tape I used specifically: HM&FC 2(IN) x 16(FT) Aluminum Fiberglass Air Intake Tube Heat shield Adhesive Backed Heat barrier

It cost me $25 from Amazon for the insulation and the tape.

 

[St1nger Guy]

I am confused that everyone is having the ISG problem. I just installed mine in the parking lot where I work on lunch with a buddy of mine. 20 minutes later intake was good to go. Did not have a single issue with ISG or gas mileage. I didn't even know an intake could cause those kinds of issues before this thread. I did change out the factory clamp on the small hose a day later but everything worked fine before I changed it out. I must have gotten lucky.

 

[DanielN]

Well the factory clamp on my ISG hose did not clamp down at all to the fitting. Meaning, there would be a vacuum leak right there and ISG would not engage until I properly clamped it down with a new clamp.

 

[NYLAWBIZ]

Well the factory clamp on my ISG (Idle Stop and Go) hose did not clamp down at all to the fitting. Meaning, there would be a vacuum leak right there and ISG (Idle Stop and Go) would not engage until I properly clamped it down with a new clamp.

I used a different clamp too. Also, after driving with them for four or five thousand miles, the fitting loosened. When I tightened them, I used thread locking compound on the plastic threads to keep things tight.

 

[Socalstinga]

I installed mine last week without issues. Aside from having to trim the BOV hose and invert them, everything else fit fine. I did notice that K&N did supply a larger plastic piece for the hose that seems to be causing the ISG issues.

 

[NYLAWBIZ]

I installed mine last week without issues. Aside from having to trim the BOV hose and invert them, everything else fit fine. I did notice that K&N did supply a larger plastic piece for the hose that seems to be causing the ISG (Idle Stop and Go) issues.

Just keep an eye on the threaded fittings every few thousand miles; the plastic against the aluminum loosens up probably becuase of different expansion coefficients of the materials.

 

[Socalstinga]

Just keep an eye on the threaded fittings every few thousand miles; the plastic against the aluminum loosens up probably becuase of different expansion coefficients of the materials.

is there a reason why they use that "clamp" instead of a wormgear hose clamp? I was thinking of doing that.

 

[NYLAWBIZ]

is there a reason why they use that "clamp" instead of a wormgear hose clamp? I was thinking of doing that.

Quicker to install and remove.

 

[Socalstinga]

I'm probably going to switch all mine out for wormgear clamps. The extra minute or two won't hurt.

 

[NYLAWBIZ]

I'm probably going to switch all mine out for wormgear clamps. The extra minute or two won't hurt.

Why?