RE: Cold Air Intake for 07 H3
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RE: Cold Air Intake for 07 H3 - 4/3/2007 1:30:14 PM
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Obie1
Posts: 71
Joined: 2/18/2007
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By the time K&N does thier r&d on their intake for a vehicle that getting close to a year in production, everyone who owns a 07' H3 will have bought another brand or cut up a radiator hose from a 1962 Kenworth to make their own CIA. LOL
< Message edited by Obie1 -- 4/3/2007 2:52:44 PM >
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RE: Cold Air Intake for 07 H3 - 4/3/2007 9:57:53 PM
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HUMMER DRIVER
Posts: 447
Joined: 3/12/2007
Status: offline
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quote:
2luke2
To pull this back on subject... I have my 06 K&N sitting in the garage... someone from the forums was looking to buy it, but if they don't i'll cut that beast up and let you know how it turns out lol...Because I would like to use it on the 07 as well.... But I can't think of how the MAF sensor goes into the stock system for the life of me now... Now if I didn't break my digital camera... I would take pictures too lol... I think tonight I'll take a picture with my camera phone and show you how bad I broke my other cam lol..
Dude, I have the same thing except I bought mine K&N under the assumption it would work on the 07, WRONG... I'm damn tempted to get my hack saaw and cut that damn tube and fit it to my stock breatherbox and stick a K&N filter inside. Get's rid of the resonator box and that stupid accordian center section...
I was super busy this weekend, didn't get to experiment much but it looks like it just may work with the supplied couplers with the K&N CAI system. I needed to take the breather box off and take some measurements on the system before attempting to cut the plastic K&N tube. It's hard to eyeball the alignment but it looks really close to fitting, I just fear after I cut it and try to mate it up with the breather and throttle body it'll be off a half inch or more and I'll be hosed.
Performace Curve hasn't bothered to reply to my two emails asking if I could return it. I talked to K&N and they told me if they don't let me return it to call them and they would try to help. I don't see anything soon for the 3.7L from K&N.
I'd like to sell mine and recoup as much as I can, it's unused but opened. Works only on the 2006 H3. If no one bites, I may have to get the hacksaw out and do some experimenting.
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RE: Cold Air Intake for 07 H3 - 4/8/2007 3:02:12 AM
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HUMMER DRIVER
Posts: 447
Joined: 3/12/2007
Status: offline
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Update:
I was piddling in the garage this evening (late this evening) and decided that I had good luck with the PCMforless Loaner install I just completed that now would be a good time to get out the K&N 63-1095 Cold Air Intake system I had purchased for my 07 that would only fit the 06 model H3. I was close to selling it for a loss this wekend and decided to give it a try.
I got to looking at the True Flow system install and noticed how they were only adding a smooth intake tube between the stock breather box and the throttle body. I really couldn't tell for sure the K&N tube would fit if I cut about 6 inches of it off on the breather side. The bends and angles looked about right although there was no way to check for sure until I cut the tube and test fit it to my engine.
To make a long story short, I took off the stock resonator box and accordian tube between the throttle body and the stock breather box. I cut my K&N intake tube and it took about 4 cuts on the band saw to get it just right. I used the stock silicone straight couplers the K&N came with. I was worried they might not work if the final angles were off more than a degree or two.
I think I'm going to order a 3.5" ID silicone hump coupler for the breather side connection. The system is pretty rigid and that's probably not a good thing. I suppose the stock accordian intake tube absorbs vibration and torque movement from the engine and the fixed breather box. I noticed True Flow uses the hump couplers too and my guess is they do it to allow the tubing to flex some at the humps on either end.
Below are two pics of the K&N intake tube retrofitted to my 07 H3. Basically I've got the same thing as the True Flow system now with the exception of their foam filter. I have a K&N OEM replacewment filter inside my stock breather box. So I now have K&N filtration plus the smooth bore tubing of the K&N intake tube without the resonator box and that darn accordian intake tube.
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RE: Cold Air Intake for 07 H3 - 4/8/2007 7:30:31 AM
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07HummerH3
Posts: 331
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Sweet job. It looks great and saved you a bucket of $. Let us know how the PCM works with the HummerDriver CAI.
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07 H3: Slate Blue Metallic(a) w/ Tan interior, Lux & Adv Pkgs, 35" MTZ's, Gibson SS Split Rear Exhaust, TrueFlow CAI, Truxxx Lift, Nav System, Monsoon Stereo/CD, SIRIUS, Sunroof, Chrome Brush Guard, Chrome Mini-Grille, Tow Pkg, Silverstars, Roof Rails
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RE: Cold Air Intake for 07 H3 - 4/8/2007 11:07:53 AM
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HUMMER DRIVER
Posts: 447
Joined: 3/12/2007
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I figured that I'd have lost a good bit of cash selling the intake system and re-investing the remaining cash into another system. My options were a True Flow or AirRaid system for the 07.
I simply don't care for the AirRaid system, I think it's way over priced for what it gives you. The True Flow was the first choice behind the K&N. After cutting my intake tube I have a system that is just like the TrueFlow and it cost me about the same money as buying TrueFlow once you include the added cost of another K&N filter that fits the stock breather box.
If anyone needs a brand new K&N Cone filter for the 63-1095 I have one here that I can't use and I'll make a fair deal on it. It won't fit my intake so I had to buy a K&N OEM replacement filter (barrel type).
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RE: Cold Air Intake for 07 H3 - 4/8/2007 5:19:26 PM
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07HummerH3
Posts: 331
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Are you noticing a vibration from the air box with the current set up? I seem to get a little just around idle when the engine is cold.
_____________________________
07 H3: Slate Blue Metallic(a) w/ Tan interior, Lux & Adv Pkgs, 35" MTZ's, Gibson SS Split Rear Exhaust, TrueFlow CAI, Truxxx Lift, Nav System, Monsoon Stereo/CD, SIRIUS, Sunroof, Chrome Brush Guard, Chrome Mini-Grille, Tow Pkg, Silverstars, Roof Rails
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RE: Cold Air Intake for 07 H3 - 4/9/2007 9:23:22 AM
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2luke2
Posts: 184
Joined: 6/3/2006
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Awesome job Hummer Driver! I was one step away from cutting mine in half as well lol, but Shawn wanted it bad enough I guess. Thanks for the post. I'm still looking at another solution to my missing CAI.
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RE: Cold Air Intake for 07 H3 - 4/10/2007 7:08:32 PM
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HUMMER DRIVER
Posts: 447
Joined: 3/12/2007
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Guys,
I have noticed a bit of a rattle on a cold start. I've not had time to investigate it closer but at first I thought maybe it was my loaner PCM, it idles lower and a little rougher after installing the loaner unit. After I ran the loaner PCM for a day I said what the hell, so I cut the K&N tube and fitted it down. Mind you I have those straight silicone couplers and they don't flex much. That's one reason I ordered a hump coupler to get me some flex.
The 07 breather box is shock mounted but it's pretty firm. I think I may need to take the 3 mounting bolts off and lay down some more damping rubber between the washers to allow the breather box a little more floating room. I also believe that the hump coupler will help too as it's pretty rigid now.
I dunno, maybe after I get my tweaked PCM back from Kelly and the gang at PCMforless it may smooth it out as it's going to be tuned for catback and CAI.
I was a little surprised that the intake noise isn't that loud. I've heard people saying they really notice their CAI sucking hard, maybe because I'm using my stock sealed breather box I'm getting more sound supression than with the K&N air dam setup for the 06 models. I also noted that the K&N AirCharger kit I got the intake pipe passes through the air dam wall and hangs loosely inside the air dam cavity. So it's not a rigid system, I suppose that's why GM put that aggravating accordian intake tube on theirs to allow some flexing between the engine and the breather box for engine torque rotation.
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RE: Cold Air Intake for 07 H3 - 4/10/2007 7:21:17 PM
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HUMMER DRIVER
Posts: 447
Joined: 3/12/2007
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BTW_If you look at the bottom photo, you can barely see the return line to the breather box on the front side near the front right corner. The 06 model does not have this emissions return tube that feeds back into the breather box. I believe it's a charcoal cannister that sits down below the breather box and is probably one of the main reasons the 07 has such better smog numbers than the 06.
I shipped my original PCM back to Kelly at PCMforless yesterday, can't wait to get it back and swap it out and see how things run.
I was able to take my PCM off without removing the washer and radiator overflow tanks. I just reached behind it and tugged on the little red straps and popped them out of the clip by pulling straight up, once the red straps are out of the way you need to depress a small black tab where the gray outer case is and once you can lift the gray case by pushing the black tab in slightly which releases the catch holding the gray case in place, the gray case rotates upward on a hinge point at the top rear, when you get the gray bracket all the way up you can then firmly grasp the cable connector and I gave it a rocking motion to loosen it up by hand and in a few minutes I had all three off. Then you simply pull the PCM module out by pulling up on the two top black tabs that secure the top of the PCM module. The three connectors are color coded so you really can't hook it up wrong. Just be careful when removing the PCM cables, take your time and be gentle, you don't want to break anything here.
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