Air intake tube options - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Chris Coufal · 06-17-2015, 10:34 AM

What are you guys using for airtube and filter? Battery is being moved to the back....so I can go left or right. Going into a 66 with an LQ4.

jackyl9999 · 06-17-2015, 10:45 AM

I used a stock airbox setup. Cheap and easy to find.

KMC3420 · 06-17-2015, 11:18 AM

I Plan on using this. TRKFRK used it.

Amazon.com: GMT800 V8 Truck/SUV 4" Aluminum...
http://67-72chevytrucks.com/vboard/s...424609&page=21

BR3W CITY · 06-17-2015, 12:31 PM

A perfect segue for me to insert myself lol

Moving the battery

You Tube

Building an air box for an ls swapped c10

You Tube

*I have pics in my build of the intake kit I started with. Its the 2004 Silverado cold air intake which you can easily find in 50 version on ebay for under $50...which has had the tubes flipped and brackets trimmed. I did add an additional bend from Spectre, but only because my intake had been modified already once before. But its possible to make a functional intake with just the cheap Silverado kit by itself.

Chris Coufal · 06-17-2015, 01:19 PM

Thanks for the videos. What engine cover is that off of? I have the basic Vortec one and don't like it.

**mongocanfly** · 06-17-2015, 01:40 PM

I used spectre fittings and filter and 4" mandrel bent alum tube...got everything i needed off ebay.

BR3W CITY · 06-17-2015, 03:43 PM

Quote:

Originally Posted by Chris Coufal

Thanks for the videos. What engine cover is that off of? I have the basic Vortec one and don't like it.

No problem. The cover is the 3-piece vortec max cover. It came on some of the Denali's, Yukon XL's, and I think a couple of the high-option package trucks. Its the same basic cover as the "vortec 6000" and Cadillac 3 piece covers, but the center just has "Max" on it instead of something else. Lettering was just hand painted on since everyone kept asking what size motor it was.

lutronjim · 06-17-2015, 06:55 PM

If you are using MAF sensor, make sure you have 4" tubes. I got a unit off Ebay that downsized from 4" to 3.5" at the throttle body and kept getting codes. Changed to 4" and no more problems.

BR3W CITY · 06-17-2015, 07:37 PM

The throttle body and MAF are 85-92mm depending on exact combo, either of which shouldn't have a problem with a 3.5" tube (87mm is ~3.4")

Are you sure it was the tubing size that caused the issue, not the actual placement of the MAF in relation to the tubing and bends?

Chris Coufal · 06-18-2015, 12:12 AM

where should the MAF be placed within the tubes?

BR3W CITY · 06-18-2015, 02:06 AM

Quote:

Originally Posted by lutronjim

4" to 3.5" at the throttle body and kept getting codes. Changed to 4" and no more problems.

Quote:

Originally Posted by BR3W CITY

The throttle body and MAF are 85-92mm depending on exact combo, either of which shouldn't have a problem with a 3.5" tube (87mm is ~3.4")

Are you sure it was the tubing size that caused the issue, not the actual placement of the MAF in relation to the tubing and bends?

So despite the math actually working, I was looking at another manual from a crate engine which actually does list a 4" diameter tube. Though it doesn't rule out a 3.5", it does specifically refer to a "4" tube. I've got the text below.

Quote:

Originally Posted by Chris Coufal

where should the MAF be placed within the tubes?

You want it in a straight run of tube, with at least a few inches before any bends or any portion which may create turbulence. This includes keeping it far enough away to avoid turbulence from the throttle body. Here's the reference from gm:

Ensure the MAF sensor is oriented correctly in the induction (it will
only read correctly in the proper direction). An arrow is located on the
sensor indicating correct flow direction. Verify this before welding the
mounting boss, as the sensor will mount only one way in the boss.

Ensure the MAF Sensor is mounted in the middle of a minimum 6 inch
length of 4 inch diameter tube, and is a minimum of 10 inches from
the throttle body."

Robznob11 · 06-18-2015, 09:12 PM

I used two eBay Silverado kits with a k&n. Mass needs to be in the longest straight section of pipe at least 10" away from the tb for best results.

**dayj1** · 06-18-2015, 10:52 PM

The advice that you've been given so far is good and is directly in line with the GM recommendations, but I found that MAF placement was quite forgiving in my case. I attached the MAF directly to the throttle body and it runs great and has never thrown any codes.

Robznob11 · 06-18-2015, 11:20 PM

Mine was directly on tb too and seemed to be fine , that is until I dropped a cam in it. Then it started running lean and popping through the intake.

Andy4639 · 06-19-2015, 08:53 AM

Mine on the 6.0 in the 71.

Hole cut in support for the cold air.

90 model Caddy box modified for it.

Lowes ninty and 2 couplings.

Mounted in the truck.

Chris Coufal · 06-19-2015, 08:26 PM

thanks

**kitsbeach** · 06-21-2015, 03:31 PM

Quote:

Originally Posted by dayj1

The advice that you've been given so far is good and is directly in line with the GM recommendations, but I found that MAF placement was quite forgiving in my case. I attached the MAF directly to the throttle body and it runs great and has never thrown any codes.

Okay that is a very cool setup..!!

And what are those valve covers and/or heads with the perimeter bolts..??

**dayj1** · 06-21-2015, 04:38 PM

Quote:

Originally Posted by kitsbeach

Okay that is a very cool setup..!!

And what are those valve covers and/or heads with the perimeter bolts..??

Thanks. That's plain SBC valve covers on stock 4.8 heads. The magic is valve cover adapters from ICT Billet. My engine swap thread is here: http://67-72chevytrucks.com/vboard/s...d.php?t=668385

06-17-2015, 10:34 AM	#1
Chris Coufal Registered User Join Date: Aug 2014 Location: Austin, TX. Posts: 138	Air intake tube options What are you guys using for airtube and filter? Battery is being moved to the back....so I can go left or right. Going into a 66 with an LQ4.

06-17-2015, 10:45 AM	#2
jackyl9999 Registered User Join Date: Feb 2003 Location: Paragould, Ar Posts: 571	Re: Air intake tube options I used a stock airbox setup. Cheap and easy to find. __________________ 1970 Gmc Grande Sierra Swb 2wd LSX (LQ4/4L80e) 1990 K1500 Daily

06-17-2015, 11:18 AM	#3
KMC3420 Registered User Join Date: Dec 2012 Location: Harrison, AR Posts: 1,065	Re: Air intake tube options I Plan on using this. TRKFRK used it. Amazon.com: GMT800 V8 Truck/SUV 4" Aluminum... http://67-72chevytrucks.com/vboard/s...424609&page=21 __________________ Keagan 68 SWB C-10 original 350 A/C 503 Mean Green

06-17-2015, 01:19 PM	#5
Chris Coufal Registered User Join Date: Aug 2014 Location: Austin, TX. Posts: 138	Re: Air intake tube options Thanks for the videos. What engine cover is that off of? I have the basic Vortec one and don't like it.

06-17-2015, 01:40 PM	#6
mongocanfly Post Whore Join Date: May 2015 Location: Alabama Posts: 14,671	Re: Air intake tube options I used spectre fittings and filter and 4" mandrel bent alum tube...got everything i needed off ebay. Attached Images

06-17-2015, 06:55 PM	#8
lutronjim Registered User Join Date: Dec 2013 Location: Dunwoody,Ga Posts: 443	Re: Air intake tube options If you are using MAF sensor, make sure you have 4" tubes. I got a unit off Ebay that downsized from 4" to 3.5" at the throttle body and kept getting codes. Changed to 4" and no more problems.

06-17-2015, 07:37 PM	#9
BR3W CITY meowMEOWmeowMEOW Join Date: Sep 2009 Location: MKE WI Posts: 7,128	Re: Air intake tube options The throttle body and MAF are 85-92mm depending on exact combo, either of which shouldn't have a problem with a 3.5" tube (87mm is ~3.4") Are you sure it was the tubing size that caused the issue, not the actual placement of the MAF in relation to the tubing and bends? __________________ *'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING* MY BUILD THE H8RDCPTR //\\ MY YOUTUBE CHANNEL REV J HD

06-18-2015, 12:12 AM	#10
Chris Coufal Registered User Join Date: Aug 2014 Location: Austin, TX. Posts: 138	Re: Air intake tube options where should the MAF be placed within the tubes?

06-18-2015, 09:12 PM	#12
Robznob11 Registered User Join Date: Feb 2004 Location: brownfield texas (west texas) Posts: 1,936	Re: Air intake tube options I used two eBay Silverado kits with a k&n. Mass needs to be in the longest straight section of pipe at least 10" away from the tb for best results. Attached Images __________________ The Ghost 67 short wide full custom. 550 hp LSX, 4l80E, narrowed 9". Body dropped w/air ride! ........................ ___ .........________//__{\_____ ,,,,,,,/__(⊙)___//___/__(O)_/ @disciple2.rc 💪instagram💪 LED TAILS Last edited by Robznob11; 06-18-2015 at 09:18 PM.

06-18-2015, 10:52 PM	#13
dayj1 Senior Member Join Date: Jul 2009 Location: Athens, AL Posts: 499	Re: Air intake tube options The advice that you've been given so far is good and is directly in line with the GM recommendations, but I found that MAF placement was quite forgiving in my case. I attached the MAF directly to the throttle body and it runs great and has never thrown any codes.

06-18-2015, 11:20 PM	#14
Robznob11 Registered User Join Date: Feb 2004 Location: brownfield texas (west texas) Posts: 1,936	Re: Air intake tube options Mine was directly on tb too and seemed to be fine , that is until I dropped a cam in it. Then it started running lean and popping through the intake. __________________ The Ghost 67 short wide full custom. 550 hp LSX, 4l80E, narrowed 9". Body dropped w/air ride! ........................ ___ .........________//__{\_____ ,,,,,,,/__(⊙)___//___/__(O)_/ @disciple2.rc 💪instagram💪 LED TAILS

06-19-2015, 08:53 AM	#15
Andy4639 Old member Join Date: Jan 2002 Location: Liberty, & Garden City S.C. , U.S. Posts: 19,945	Re: Air intake tube options Mine on the 6.0 in the 71. Hole cut in support for the cold air. 90 model Caddy box modified for it. Lowes ninty and 2 couplings. Mounted in the truck. __________________ 1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.

06-19-2015, 08:26 PM	#16
Chris Coufal Registered User Join Date: Aug 2014 Location: Austin, TX. Posts: 138	Re: Air intake tube options thanks

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