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H3 I5 Homemade cold air intake/tube

awalsh

awalsh

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Messages
349
Location
New Jersey
Going to attempt the PVC cold air intake tube tonight, can anyone specify what is needed other than 3.5" pvc
I think the previous form was deleted with the list of parts


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Kyle

Kyle

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Messages
1,707
Location
Santa Clarita, CA
I was the one that originally did it, you will need some extra rubber hose for the pcv valve and a connector for the new tube and a coupler for the new line to the pcv valve rubber hose end


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awalsh

awalsh

Well-Known Member
Messages
349
Location
New Jersey
Kyle said:
I was the one that originally did it, you will need some extra rubber hose for the pcv valve and a connector for the new tube and a coupler for the new line to the pcv valve rubber hose end


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Yes I knew this: just found your post, 1/2 inch hose and 1/2 inch coupler, I'll update later.


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Kyle

Kyle

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Messages
1,707
Location
Santa Clarita, CA
awalsh said:
Yes I knew this, but what are the sizes of hose and coupler valve?


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I just got under the hood and brought the pcv tube to pep boys and matched it up best I could to some rubber hose line they had same goes for the couplers, you don't need super thick hoses or any special couplers long as it's free flowing you will be fine.


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Kyle

Kyle

Well-Known Member
Messages
1,707
Location
Santa Clarita, CA
Kyle's h3 build

Update, i was bored yesterday and decided that i was going to build my own air doc intake. So after looking at a couple photos, and going under the hood and taking a couple measurements, i went to lowes and got 1ft of 1/2in rubber hose, a 1/2in coupler with thread on one side and a a ribbed side for the hose to slide on too. Lastly i bought a 3.5inch pipe. After measuring again and fitting everything up and tightening it down i was done! Took her for a test drive, and WOW! Really loud and way better acceleration and throttle response.





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awalsh

awalsh

Well-Known Member
Messages
349
Location
New Jersey
Is it 1/2" inner diameter or outer diameter for the coupler and hose?


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awalsh

awalsh

Well-Known Member
Messages
349
Location
New Jersey
f69cbc579893ad59a4325e00421bb4af.jpg
almost finished. 3" pvc, 1/2 inch coupler and 1/2 inch hose. Just need to mount it


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awalsh

awalsh

Well-Known Member
Messages
349
Location
New Jersey
Installed and honestly not a huge difference, very surprised but I will say it definitely opens up more when you step on it. I was expecting it make my exhaust louder but my exhaust is already really loud with that 6" tip/no muffler so I'm not surprised it doesn't rumble any more lol


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Kyle

Kyle

Well-Known Member
Messages
1,707
Location
Santa Clarita, CA
awalsh said:
Installed and honestly not a huge difference, very surprised but I will say it definitely opens up more when you step on it. I was expecting it make my exhaust louder but my exhaust is already really loud with that 6" tip/no muffler so I'm not surprised it doesn't rumble any more lol


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It makes the intake louder if anything, that giant box on the top of the motor is an intake silencer.


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awalsh

awalsh

Well-Known Member
Messages
349
Location
New Jersey
Kyle said:
It makes the intake louder if anything, that giant box on the top of the motor is an intake silencer.


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Yes after driving it for a few days I agree 100%, and I will say it decreased the amount of engine drone I had inside of the cabin substantially.


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USMC_315

USMC_315

Well-Known Member
Messages
590
Location
Northern VA
I think I already talked to awalsh about this, but the AirDoc intake sys. is a HUGE waste of money. For as much as I paid for the damn thing, I expected it to fit perfectly, but nope. Sh*t... I even had to do some of my own fabs to it in order for it to stay seated correctly
 
awalsh

awalsh

Well-Known Member
Messages
349
Location
New Jersey
USMC_315 said:
I think I already talked to awalsh about this, but the AirDoc intake sys. is a HUGE waste of money. For as much as I paid for the damn thing, I expected it to fit perfectly, but nope. Sh*t... I even had to do some of my own fabs to it in order for it to stay seated correctly
Click to expand...

Yeah Scot I agree that's why I went with the pvc [emoji23]


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4speedfunk

4speedfunk

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Messages
4,212
Location
Tardville
? My AirDoc fit perfectly....practically jumped out of the box and onto the motor.


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650Hawk

650Hawk

Well-Known Member
Messages
483
Location
SoCal
I modified my (Alpha) intake to mimic an AirDoc. Simply cut the entire "muffler" section out, took some 1/8" thick ABS plastic, bent it to fit the curve and pop-riveted it in place along with silicone to seal it. Then relocated the fitting for the PCV line and added a bit longer line. Costed me nothing, looks fine, grants access to the top of the engine/wiring (with the HUMMER cover removed). Didn't notice any performance diff, although it does seem a tad louder.





 
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