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Cold Air Intake Tech Article

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Old 08-28-2001 | 11:13 PM
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From: Conroe, TX
Car: 1987 GTA
Engine: LS1
Transmission: 4L60e
Cold Air Intake Tech Article

Stuff needed:
 3" PVC Pipe from your local home improvement store
 3" PVC elbow (the long version with one lobe already taken off, or you can cut it off if you get the 2 lobe version)
 3" to 3" rubber connection (It has rubber hose fasteners on each side) (You'll find it where you find the PVC, probably on the same isle. It might be a little bigger and this is okay as long as it has the ability to tighten to 3")
 3 rubber hose fasteners
 Black heat resistant paint
 K&N filter part #DFM9601C. It's a 9 inch conical. Costs $37.95...find it at http://www.thefordsource.com/store/m...nduction_3.htm
 A drill w/bit and some self-tapping screws


My procedure:
 Take out the entire airbox to throttle body assembly (including the rubber boot that connects to the throttle body)
 The metal post that is left after you take out the air cleaner assembly unscrews, so take that out too.
 Unbolt the smog canister and remove its holder.
 You should now see two relays on the sides of your now empty pocket of the car.
 These relays are to be moved to the bottom of the pocket (where the smog canister holder once sat)
 Use the self-tapping screws to secure the two relays to the bottom.
 Take the smog canister and move it as close to the radiator as you can and tuck it into the corner. This canister must remain upright to properly do its job. Mark the spot for the holes to secure the canister, and drill. I used a bolt from the smog canister holder to secure the smog canister in this position and put some sand paper foam under the smog canister to keep it from vibrting.

Now we can begin assembling the intake...
 Use wd-40 or something slick to grease up the throttle body boot (the side connecting to the airbox) and slide the PVC elbow in (if you bought the 2 lobed elbow, you will need to cut off one of the lobes) and then use a rubber hose fastener (you will be replacing the oval shaped one already on the boot) and tighten it to the elbow
 Take the PVC pipe and cut about 9 inches of it off.
 Connect the 2 (elbow and 9 inch pipe)
 Next, take the MAF and on the side that faces the throttle body, connect the 3" to 3" rubber fitting and tighten it.
 Take your PVC pipe (now connected to the elbow and boot) and slide it ALL the way into the 3" to 3" rubber fitting. It should be about 1 cm from the MAF when ALL the way slid in. Tighten.
 On your old airbox assembly, between the air cleaner holder and the MAF was a hard plastic bend. Take this off of the air cleaner assembly (be very careful not to chip or break this bend, as I did)
 Place one end of this bend into the K&N filter and the other onto your MAF. Take 2 rubber hose fasteners and tighten the connections.

This assembly should fit almost in the opening in the fender, but since the cone is big, it does not. This PVC setup is for trial fit purposes and it is not recommended by me to stop here. The next step is to take your car to an exhaust shop and have them fit a 3 1/2" bend to a piece of pipe, weld it, and (you) paint it. This looks much nicer, flow better, doesn't melt at high temps, has no smell, will last forever, is not cheapo PVC pipe, and only costs another 30 bucks. This brings your total investment to about 65 - 70 bucks, depending on the labor charge of the welding. Much better looking and sounding than that 200 dollar setup from SLP. You will hear a very audible hissing noise coming from the filter. This is normal and a GOOD sound. That's the sound of your engine actually breathing compared to that factory piece of junk. Your engine (if it's like mine) will now pull harder at higher rpms, run a little cooler, and the exhaust note changes a little too.

If this doesn't display very well, follow this link:

http://www.geocities.com/jonathan_badgett/cai.txt

for some pictures after the install please visit:

http://www.geocities.com/jonathan_badgett/index.htm

------------------
~3.1EyeCandy~
"The Car that started my craze"

'92 Firebird 3.1 (A car sold)

My new baby: '87 flame red GTA 350 w'auto, ported and polished plenum, custom cold-air intake w/K&N, 180* thermostat, Hooker SuperComp Exhaust, Splitfire plugs, Hypertech Airfoil,
Carmine interior with pioneer all around
My Cars

jonathan_badgett@yahoo.com

[This message has been edited by 3.1EyeCandy (edited August 28, 2001).]
Old 08-28-2001 | 11:19 PM
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From: Conroe, TX
Car: 1987 GTA
Engine: LS1
Transmission: 4L60e
Oh yeah, one last thing...

THANK YOU to Jobryan26 for his idea on the cold air intake that I originally did and extended upon.

If anyone has any questions on the instructions, please list them here.

I will be finalizing the tech article for submission to thirdgen.org in the next couple of weeks and need all of the help I can get. Thanks.

Old 08-29-2001 | 10:36 AM
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Joined: Jan 2001
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From: Conroe, TX
Car: 1987 GTA
Engine: LS1
Transmission: 4L60e
Any suggestions?
Old 08-29-2001 | 10:43 PM
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From: Conroe, TX
Car: 1987 GTA
Engine: LS1
Transmission: 4L60e
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