Those that have modified there tpi airbox... - TPI - Third Generation F-Body Message Boards

MikeH · 09-21-2006, 09:46 PM

I want to open the restriction. where the boot connects to the y shaped air box. IM going to get some 3.5" pvc from the local hardware. How do i weld or connect it to the box.

Ive seen others that have done this but cant find the post or person. If you have done this please share how you connected the new piece to the box.

Ive opened the area up where it necks down to 3/4. using a heat gun, the only restriction now is where the boot connects.

Thanks,
Mike

90 white Z · 09-21-2006, 11:30 PM

First check in the tech articles section it should be located in the tpi mods area. But if that doest have what your looking for simply search the site using the search function

1989GTATransAm · 09-21-2006, 11:36 PM

Delete

MikeH · 09-22-2006, 12:09 AM

Quote:

Originally Posted by 90 white Z

First check in the tech articles section it should be located in the tpi mods area. But if that doest have what your looking for simply search the site using the search function

lol..really i never thought of that...lol...Of course i searched had i found what i was looking for i wouldnt have made this post.

MikeH · 09-22-2006, 12:11 AM

Quote:

Originally Posted by 1989GTATransAm

Delete

Move along troll...

Kevin91Z · 09-22-2006, 01:45 AM

I have my airbox modded this way, done by JerryWho. It was worth 8 hp at the wheels on my car and on other car. I dont have any pictures though. He used some kind of plastic glue.

MikeH · 09-22-2006, 03:39 PM

Quote:

Originally Posted by Kevin91Z

I have my airbox modded this way, done by JerryWho. It was worth 8 hp at the wheels on my car and on other car. I dont have any pictures though. He used some kind of plastic glue.

Hi Kevin...thats a good gain at the wheels.

I took a heat gun to the part where it really necks down. Opened it up pretty good, not pretty but it should help. I have a stocker i can throw on there if i need to. I plan to make a before and after pull on the dyno using it.

Ive never glued stuff like this before so im unsure what would hold up to the heat. I was talking to a buddy and he suggested marine grade epoxy. He said they Also make, some type of glue that welds plexi glass. I might give those a try.

Nazzz28 · 09-22-2006, 04:00 PM

If anyone has any pictures of this I would really appreciate it. Sounds like a simple and cheap way to pic up ~10 hp.

NoItsNotForSale · 09-24-2006, 01:44 PM

You can get plastic weld epoxy at Autozone. It works

1991CamaroRslow · 09-25-2006, 04:48 PM

Pics of where you opened the box with the heat gun would be appreciated. I'm thinking of doing a CAI that drops down in front of the tire but if I can get the stock Y intake opened up good enough I'll just stick with that.

MikeH · 09-26-2006, 09:31 PM

Quote:

Originally Posted by NoItsNotForSale

You can get plastic weld epoxy at Autozone. It works

Thanks i will look for that.

I got alot done on the intake tonight. its turning out good so far. when its all filled and painted should look close to stock. just flow alot better.

1991CamaroRslow...I will be sure to post some pics when its done.

MikeH · 09-27-2006, 07:40 PM

That plastic weld epoxy worked great! Its all welded up just have to paint it, and make it look pretty.

The smallest area now is 3.5" just as it goes into the box. I ported it as much as i could. Stock was 2 5/8" im going to run a 4"x8" silicone intake hose. The stock intake hose is 4" on the tb end. And the new intake opening is 4" so it should look clean with the 4" one peice hose.

IM hope to get about 15 rwh out of it. But will see.....

MikeH · 09-27-2006, 08:01 PM

Heres the boots im looking at, not sure what would work better.

or this one.

or go with the two rubber ends and the aluminum pipe in the middle.

1991CamaroRslow · 09-27-2006, 11:53 PM

Can you post some pics of how you heat gunned the stock box open? I'de like to see the entire setup once it's done.

Gallileo60 · 10-02-2006, 11:07 PM

Yes PLEASE post some pics for us, I am interested in doing something similar..Thanks, Tom

MikeH · 10-02-2006, 11:50 PM

Hey guys, im sorry i dont have any pics yet. My work is really crazy right now. So i dont have much time for the car at the moment. But when i can i will take some pics for you.

What i did with the heatgun, was apply the heat to the outside of the box. And used a large wrench from the inside to pry the plastic as it got soft upward. Crude but it worked to open the area as it dropped down to the air filter area. Im sure you know the spot it gets real thin. Just keep working the crease till it pops upward. This will bubble the plastic some, but it can be sanded and filled to look nice. Just try to keep it looking as uniform as possible. Saves work in the end. IM not sure if this will work on the stock hood though. Might not close.

Also this works in the filter area to sort of raise the roof. Just flipp the box over and apply the heat to the inside. Place the box over something thats open. I used a large pipe. Then take your tool of choice and push the top of the filter area up. Just try to raise the roof.

The plastic epoxy can be sanded as well. Im still working on getting the silicone hose im going with the black one pictured. But i might have to by three to get the one because its a special order because of the 8" lenght. Havent found it anywhere else yet.

D's89IROCZ · 10-04-2006, 03:12 PM

Here is a pic of my setup . It may not be as ncie as your plans but man it fits in there sweet. It's a furnace elbow. 6" round into a 3x? square mouth. It fits right over the boot that comes outthe back of the fog lights.

MikeH · 10-04-2006, 04:47 PM

Hey thanks for sharing that. Ive seen that done. good way to bring in the cold air. I might end up doing something similar with mine as well.

D's89IROCZ · 10-06-2006, 02:14 PM

cost me about 6 dollars

fin170703 · 10-06-2006, 02:51 PM

this is what i'm looking to do also

I've got a '87 350 , i'm trying to figure out what bit you heated up and removed. if i undone the butter fly clips holding the y-shaped housing and remove the airfilters all i chan see is a plastic set up , so are you saying that you heat all of that up and gouge it all out and just run a clear peice of ducting down to the fog lights ?????

I'm a simple guy that struggles with the stuff you guys find easy

1991CamaroRslow · 10-06-2006, 03:06 PM

You cut all those silencers out. I believe he's heating the actual box.

fin170703 · 10-06-2006, 03:11 PM

what before it goes into the y part.

its a bit difficult for me as my car has been in the garage for 3 weeks getting the transmission sorted so i cant look and realte to anything. so that plastic setup under the filters is silencers then once i cut them out is the area free to run ducting down to the fogs ?

MikeH · 10-08-2006, 10:03 AM

Right, look at the picture above you need to remove all the stuff under the filters. There is info on this in the tech section.

I got some more done last night on the box. I found the wooden end of a large ballpeen hammer i have worked great at finishing the box. I just kept heating the low spots and working them up to smooth the box out. Kinda like metal working a panel. So it looks uniform, not like someone just heated the thing with a torch lol.

The lid is now the same height from the boot area. And slopes down nicely to the filter area. Before it necked down really tight.

I ordered the 4"id silicone hose,and a peice of 4" od aluminum intake pipe. IM gonna shove the pipe, into the hose to prevent any collapsing. Thats common on the stocker on the topend.

Heres a picture of the filter im talking about.

I also have a idea for a third K&N filter that mounts on the top of the box. I found one on the website thats 7"x3" a panel type filter. It will fit into the bottum of the hood when the hood is closed, and pull cold air from the scoop and the latch area like the stocker. But it will mount on top of the air box.

The SS hood i have has an air gap between the top and bottum peices. And the filter would sit in this area when the hood is closed. Looks like it will work just have to buy the filter and try it out. I have a spare that im using as a test box.

1bad91Z · 10-09-2006, 09:18 AM

This is what I did.........

danjanIROCZ · 10-09-2006, 12:50 PM

I was just curious as to whether running ducting down to the fog lights decreases the airflow to the radiator. Because when i took out my lower airbox to cut off those silencers, I noticed what looked like a shroud leading back to the radiator. So have any of you guys with the ducting to the fog lights noticed any increase in temps or anything? and did you cut through this plastic shroud thing as well? Thanks.

fin170703 · 10-09-2006, 01:08 PM

looks a sweet install 1bad, what did you use a ducting ??

iroc4ever · 10-09-2006, 11:07 PM

Quote:

Originally Posted by danjanIROCZ

I was just curious as to whether running ducting down to the fog lights decreases the airflow to the radiator. Because when i took out my lower airbox to cut off those silencers, I noticed what looked like a shroud leading back to the radiator. So have any of you guys with the ducting to the fog lights noticed any increase in temps or anything? and did you cut through this plastic shroud thing as well? Thanks.

I cut through that thing and I didnt really notice any temp increase after I did this mod. I didn't really notice any power gains either though...

GuitarJunki17 · 10-10-2006, 12:40 AM

Quote:

Originally Posted by danjanIROCZ

I was just curio