"Swiss Cheesing" the cleaner housing
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From: Massachusetts
Car: 87 Trans Am, 89 RX7
Engine: 350tpi,350carb
Transmission: T-5,t56
Axle/Gears: 3.42 Posi,4.11 posi
"Swiss Cheesing" the cleaner housing
As for now I have heard of "swiss cheesing" the top and of doing away with the cleaner housing totally and using a K&N Cone Filter mounted directly to the MAF giving good results.
Can anyone explain how this is done (with pics would be great, but i can prolly figure it out without too).
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From: LaGrange (10min from Poughkeepsie), NY
Car: 1992 Camaro RS - not real slow anymore...
Engine: SPDC 360 MAF EFI /w a Holley Stealth Ram
Transmission: T5 untill it blows up from to much torque
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Car: 1987 IROC-Z Camaro
Engine: 5.7 350 TPI - SLP Runners, AFPR, MSD Goodies
Transmission: 700R4 - Shift Kit, Corvette Servo
Axle/Gears: BW 9 bolt, 3.27s
On a TBI car I have drilled 2 inch holes in the air cleaner for more air.
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From: Pittsburgh PA
Car: 89 Iroc-z
Engine: 555 BBC Turbo
Transmission: TH400
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on the stock TPI air intake, i cut off the bottoms of the filter area. where the filters sit, there is alot of restriction there, so i just took a dremel with a cutoff disk and went around it. left the center bar for filter support obviously. it worked great, free'd up alot of power
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From: Lewisville,TX
Car: 92 z-28 vert heritage edition
Engine: LT-1
Transmission: 700r4
Axle/Gears: 3.08 posi
The cone filters wont be as effective because all your doing is sucking hot air from the engine bay you want cold air. I would leave the air box, but thats just me
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From: Worcester, MA
Car: 86 T/A
Engine: HSR 355
Transmission: 700R4
Axle/Gears: 2.77 posi
Its true, but you're taking in more air than the stock air box. Best bet is to take out the air box, cut a hole in the metal it sits on, then put a filter down there. Works great for me. Either way, all these intake mods aren't worth much hp in the end anyway.
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Just remember that on the Firebirds, the "Trash Can" air cleaner flows from the inside out. If you cut the outside of the can, you will be drawing unfiltered air into the engine.
You can do this:
http://72.19.213.157/files/AirFlow.pdf
That's from about six years ago, and the MAF information has changed.
You can do this:
http://72.19.213.157/files/AirFlow.pdf
That's from about six years ago, and the MAF information has changed.
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Joined: Nov 2005
Posts: 233
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From: Massachusetts
Car: 87 Trans Am, 89 RX7
Engine: 350tpi,350carb
Transmission: T-5,t56
Axle/Gears: 3.42 Posi,4.11 posi
What about the GTA's and their air intake. I heard that they had open elements with a long rubber hose and an MAF with the screens ripped off. Could someone talk about if this is a good idea for me to do. Also could someone post a pic of the air intake on a stock GTA. Thanks.
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From: Philly, PA
Firebirds with TPI in 86-87 (maybe 88?) had the weirdo "inside-out" filter assembly (we called it the "mail slot") over behind the pass. headlight along with the nasty "boxes and elbows" intake system to get from there, through the MAF and over to the TB. The whole damned thing is a disaster.
88-up (or thereabouts) Firebirds got a much more "sane" intake system with the filter housing becoming "outside-in" like you would expect, although it stayed in the same place, and a much straighter shot of tubing through the MAF and over to the TB. Better, but the filter box is STILL restrictive for the same reason the earlier one was.
My solution for an 86 years back was to get the TB-to-MAF elbow for an 88-up car, mount the MAF where it normally would in an 88 application- at the end of this elbow- and then some cheap 3" tubing and a K&N cone filter that basically laid over inside the pass. fender. Didn't do any back-to-back testing but it picked up a little, which is saying something for a peanut-cam 305 auto in a big fat T/A.
88-up (or thereabouts) Firebirds got a much more "sane" intake system with the filter housing becoming "outside-in" like you would expect, although it stayed in the same place, and a much straighter shot of tubing through the MAF and over to the TB. Better, but the filter box is STILL restrictive for the same reason the earlier one was.
My solution for an 86 years back was to get the TB-to-MAF elbow for an 88-up car, mount the MAF where it normally would in an 88 application- at the end of this elbow- and then some cheap 3" tubing and a K&N cone filter that basically laid over inside the pass. fender. Didn't do any back-to-back testing but it picked up a little, which is saying something for a peanut-cam 305 auto in a big fat T/A.
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From: Massachusetts
Car: 87 Trans Am, 89 RX7
Engine: 350tpi,350carb
Transmission: T-5,t56
Axle/Gears: 3.42 Posi,4.11 posi
My solution for an 86 years back was to get the TB-to-MAF elbow for an 88-up car, mount the MAF where it normally would in an 88 application- at the end of this elbow- and then some cheap 3" tubing and a K&N cone filter that basically laid over inside the pass. fender. Didn't do any back-to-back testing but it picked up a little, which is saying something for a peanut-cam 305 auto in a big fat T/A.
Could I maybe see a pic of this cuz I think thats what I had planned to do?
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