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TPI air box

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Old Jan 12, 2009 | 05:06 PM
  #1  
Sully89Firebird's Avatar
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From: North East Pennsylvania
Car: 1989 Firebird Formula
Engine: Stock 305 TPI
Transmission: 700R-4 w/ Shiftkit
Axle/Gears: Stock 2.73
TPI air box

Hey guys, i have a 89 Firebird Formula with the 305 tpi. I am running the stock air intake. i want to replace that part with this:

http://www.hawksthirdgenparts.com/ca...icarsonly.aspx

I want to make my Ram Air II hood some what usable. I know it wont be a completely "functional" ram air. but it is not as quite as restrictive as the stock one I have. so my question is that can i use this with my hood and make it work? and is there a possible way I can make a "homemade" version of this because $200+ is alot of money for a little box. And my last question is: How would i use the stock MAF sensor on this? I have searched alot on the boards but i cant find exactly what i am looking for, I already know there is a ram air tech page that is located here:
https://www.thirdgen.org/ramair but that specific type is not what i am shooting for. dont wanna so i posted here.


Thanks!
Attached Thumbnails TPI air box-image179.jpg   TPI air box-image039.jpg  
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Old Jan 14, 2009 | 03:13 AM
  #2  
HCR13's Avatar
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From: Augusta, Ga
Car: 1987 Trans Am
Engine: 355ci L98 soon to be turbo'd
Transmission: 700R4
Axle/Gears: 2.73 posi
Re: TPI air box

I honestly would start at the junkyard and look at many cars as possible for their air boxes and go from there. That way you know there is a specific air filter size and housing. and just go from there...
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Old Jan 15, 2009 | 07:04 AM
  #3  
Sully89Firebird's Avatar
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Joined: Nov 2008
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From: North East Pennsylvania
Car: 1989 Firebird Formula
Engine: Stock 305 TPI
Transmission: 700R-4 w/ Shiftkit
Axle/Gears: Stock 2.73
Re: TPI air box

does any one know how to use the stock MAF with this type of TPI air box?
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Old Jan 15, 2009 | 08:46 AM
  #4  
jamon8's Avatar
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From: Southern IL
Car: 88 GTA "Cocaine"
Engine: 350 tpi
Transmission: 700r4
Axle/Gears: 3.27
Re: TPI air box

use a rubber adapter that take 4in to 3 in

attach your maf sensor and you will have to make a bracket to hold the mafs

make your box out of cardboard or poster paper

transfer the design to thin sheetmetal or fiberglass over your box

make sure that you get a filter that will fit in your design before you write it in stone
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Old Feb 16, 2009 | 02:37 PM
  #5  
joeblue83's Avatar
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From: Southern Wisconsin
Car: 1988 Camaro
Engine: 383 Stroker
Transmission: Probuilt 700 R4
Axle/Gears: 3.73
Re: TPI air box

your stock intake should flow enough for a 305, if your planning on building it up, then thats a different story. Was your 305 stock or built up?
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Old Feb 19, 2009 | 06:35 AM
  #6  
Sully89Firebird's Avatar
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Joined: Nov 2008
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From: North East Pennsylvania
Car: 1989 Firebird Formula
Engine: Stock 305 TPI
Transmission: 700R-4 w/ Shiftkit
Axle/Gears: Stock 2.73
Re: TPI air box

Originally Posted by joeblue83
. Was your 305 stock or built up?

yes, my 305 is completely stock.
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Old Feb 19, 2009 | 10:46 AM
  #7  
PURPLEFORMULA's Avatar
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From: Dumfries, Va
Car: '89 Formula Firebird
Engine: LSX-451 / 705HP
Transmission: T-56
Axle/Gears: Moser Ford 9" with 4.30
Re: TPI air box

I have the total air-ram hood and air box on my 89 Formula, it fits with a couple thing needed. I had to grind allitle off one side of my MAS just so it would fit inside of the air box and cut alittle off the airbox. Took me 10 minutes. Also you have to extend the wires for the new location of the MAS. As far as someone saying you need a bracket to hold the MAS up, mine is tight enough that I didn't need to. If you go this route make sure you use something like silocone to seal your MAS to the airbox. You can also goto www.ramairhood.com and see picutres and they have the direction for the installation and also sell the air box too.

Eric
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Old Feb 22, 2009 | 10:04 AM
  #8  
Vader's Avatar
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Re: TPI air box

Your '89 intake ducts are not quite as bad as the earlier Firebird TPI intakes. If you still have the inside-out (garbage can) air cleaner, you can open the bottom for better inlet flow.


Last edited by Vader; Mar 30, 2018 at 07:51 AM. Reason: Updated links
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Old Feb 25, 2009 | 06:32 PM
  #9  
Sully89Firebird's Avatar
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Member
 
Joined: Nov 2008
Posts: 119
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From: North East Pennsylvania
Car: 1989 Firebird Formula
Engine: Stock 305 TPI
Transmission: 700R-4 w/ Shiftkit
Axle/Gears: Stock 2.73
Re: TPI air box

Originally Posted by PURPLEFORMULA
I have the total air-ram hood and air box on my 89 Formula, it fits with a couple thing needed. I had to grind allitle off one side of my MAS just so it would fit inside of the air box and cut alittle off the airbox. Took me 10 minutes. Also you have to extend the wires for the new location of the MAS. As far as someone saying you need a bracket to hold the MAS up, mine is tight enough that I didn't need to. If you go this route make sure you use something like silocone to seal your MAS to the airbox. You can also goto www.ramairhood.com and see picutres and they have the direction for the installation and also sell the air box too.

Eric



WOW thanks for the tremendous help! I will definatly send you a pm thanking you
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Old Feb 26, 2009 | 04:15 PM
  #10  
racing geek's Avatar
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Posts: 1,525
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From: Milwaukee, Wisconsin
Car: 1987 IROC-Z
Engine: 383 with Edelbrock ProFlow EFI
Transmission: TH350
Axle/Gears: 12 bolt 3.73 Eaton posi
Re: TPI air box

Originally Posted by jamon8
use a rubber adapter that take 4in to 3 in
Any idea where I can get this? I was thinking this would be a good place to smooth out the air flow into the engine on my TPI car. The stock corrugated rubber looks like it would disturb airflow too much.
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Old Feb 26, 2009 | 04:30 PM
  #11  
PURPLEFORMULA's Avatar
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Joined: Oct 2007
Posts: 150
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From: Dumfries, Va
Car: '89 Formula Firebird
Engine: LSX-451 / 705HP
Transmission: T-56
Axle/Gears: Moser Ford 9" with 4.30
Re: TPI air box

I contacted www.eautotuning.com. They have them for $6 plus shipping. It's a company that sells a cold air kit for our cars but will sell just the coupler.

Eric
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