I heard they re-did the breather hose connection to be factory. How does it work now?

 

There is a metal fitting that replicates the stock plastic one for the breather hose to lock onto. The fitting attaches to the intake with a threaded flare type connection. No issues here with it at all. Nicely done.

 

That's good to hear...

 

whats it look like and i want one

 

Basically they went back to how they were doing the breather connection when the intake first came out. Otherwise its the same old t00b maaaaaan.

 

are they freely giving the fitting to those that got screwed with the crappy one?

 

Well I have had an issue with it ever since I bought and installed their cold air like 7-8 months ago. My car would surge and lose boost. Now recently it lost all boost. I have all of their upgrades, intercooler, charge air, modular catless downpipe, cat back exhaust, and ppc tune. I have been on the phone and email with Arron and Bill from Hahn and they kept thinking it was an air leak. I had the thing reinstalled twice and like I said recently I lost all boost.

I talked with Vince at Trifecta and he suggested going back to the stock intake with a drop in K&N because he suspected that my MAF was too sensitive. He was right. After switching back to stock with a drop in filter, my car has been running great for the last 3 weeks with no issues. I sent an email back to Arron at Hahn about asking for a refund or something. That was about 1 1/2 weeks ago. I haven't heard anything from them yet. I have also left them phone messages about it.

 

my hahn intake gives me no troubles. boost fine, have had it for 6 months now without a problem. now im tuned and still no problems.

 

I had the same exact problem with same exact hahn parts, Vince told me the same thing with the MAF sensor had reading that was all over the place. Vince thought - boost leak, under gap'd plugs, bad coil packs, BOV, etc.. later to find out when I went to the dealer, and they found out the sensor was damaged from having oil leaked onto the MAF sensor.. They told me the K&N oil air filter damaged the sensor. This is the same filter that comes with the Hahn CAI kit. After the dealer took out the Hahn CAI and put back the stock air box, with a dry K&N filter - all of the problems "surge, boost loss & misfires" all disappeared!! I'm now boosting @25*!!! with no problems at all!!

After meeting with a senior mech at the dealer - he told me the hahn CAI isnt designed right - the CAI should be 2.75'' end-to-end not 3'' to 2.75''.. this is what causing most of the problems, if the pipe was the same dia end-to-end, this wouldn't be an issue at all..

I think Hahn has great products (DP/Exhaust/Hot pipes)- but the CAI needs to be reengineered.

If Hahn wanted repeat business - they should contact everybody who purchased the faulty CAI and replace them, with a newly engineered CAI w/dry filter.. or give them really deep discount on the new engineered CAI!!!

But for me it would be along time before I purchase anything from them, until its proven to work the first time and everytime around - without the "check engine light" coming on..

 

Interesting thought; Changing diameter causing changing air velocities and throwing off the MAF. I wonder if this is also causing the surging.

 

Has no effect whatsoever tbh. A stock air box w/ a drop-in K&N installed has skewed fuel trims.

 

The different diameter of the intake needs to be compensated for. Took me a lot of logging to dial it in. Not for the faint hearted. HP Tuners FTW.

No surging like the Dejon SRI or AEM CAI I had in the past. I'm pleased with mine but I knew when I bought it I would have some work to do with the fuel trims.

 

I had thought the same thing about the MAF being damaged, I replaced it as well but still I got the same problems with the new MAF. I think that the measurement has alot to do with it. ( the CAI should be 2.75'' end-to-end not 3'' to 2.75"), either way I'm still waiting for a response from Hahn on this one.

BTW is anyone using the AEM cold air and having luck with it, or do you need to have that tuned as well?

 

All intakes require a tune to fully fix the MAF skew that accompany them. Even the stock airbox with a K&N requires some adjusting to get the fueling perfect.

 

The diameter of the AEM tube is larger than the Hahn by 1/2" IIRC, MAF is located close to the filter where it is more turbulent. It was just as hard to dial in and had surging issues at cold start and some lurching at DFCO. THe Hahn intake doesn't once tuned.

Both of these intakes I had the fuel trims as close as possible on my setup.

 

Hahn is 3" AEM is 3.25". The stock airbox right at the MAF is 3.25" actually, that is why the AEM elbow fits the stock airbox.

 

Thank you, I forgot the exact dia of the AEM.

 

the surging is a direct cause from the larger size CAI, if the CAI was tuned correctly from the get-go, alot of us wouldnt have this problem..

the corrected fuel trim is tiny when a k&n DI is used, but compared the CAI, the fuel trim is big to compensate more air flow at the MAF..

Im wondering if Hahn knows this, when they're marketing the CAI to consumers?

 

to OP, get rid of that stupid PPC tuner and get a good tuner from this site to help you out with the HPtuners. Iam Broke helped me out and my car runs great with the hahn intake. if you're getting oil sucked through the filter, you probably put too much oil on the filter to begin with.

 

Glad to hear it's running fine. I was wondering...