molding an intake tube
Printed From: the12volt.com
Forum Name: Fiberglass, Fabrication, and Interiors
Forum Discription: Fiberglass Kick Panels, Subwoofer Enclosures, Plexiglas, Fabrics, Materials, Finishes, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=95495
Printed Date: May 02, 2024 at 1:53 PM
Topic: molding an intake tube
Posted By: kenzo42
Subject: molding an intake tube
Date Posted: July 10, 2007 at 3:25 PM
I plan to make an intake for my car using fiberglass. However, I can't figure out the best way of making a mold to lay the fiberglass upon. Any suggestions? Urethane foam? Thanks.
Replies:
Posted By: sliptap
Date Posted: July 10, 2007 at 5:02 PM
kenzo42 wrote:
I plan to make an intake for my car using fiberglass. However, I can't figure out the best way of making a mold to lay the fiberglass upon. Any suggestions? Urethane foam? Thanks.
You mean like a cold air intake?
Posted By: kenzo42
Date Posted: July 10, 2007 at 8:18 PM
Yes, a cold air intake.
Posted By: e36rok
Date Posted: July 10, 2007 at 8:30 PM
What car is this for? If it's a cheap car you're probably better off buying one since they are ~$200 for cars like civics. Actually even for an expensive car, you don't want a crappy CAI in an expensive car. Come to think of it, you're probably better off buying one for ANY car seeing as how a fiberglass CAI will be inferior to one made from mandrel bent tubing... good luck either way.
Posted By: jmelton86
Date Posted: July 10, 2007 at 8:50 PM
Plastic tubing is Far better than aluminum or any other metal, really. It doesn't conduct heat so much -allowing for 'denser' air which allows for better power and fuel economy. I built a custom one for my 95' Cavalier as Napa where I work doesnt offer them for my car(I don't see the point in buying one when I could 'rig' one). I took 2 different ones from the trash (no shame at all!) and cut each down so it'd go where I wanted. I then use the adapters that came with them and routed it correctly. I plugged off all holes I didn't need and ran the PVC/breather hose and AIT sensor to holes already there. They are aluminum. -Because they are 2 separate pieces with rubber adapter in between, the one attached to the intake manifold stays Much cooler than the first one, which keeps me happy. I got a K&N filter to fit it, courtesy of RTV silicone. Just an idea. ------------- 2013 Kia Rio -90a alternator
DDX470HD GTO14001 GTO1014D (x3)
Big3 in 1/0G
1/0G to GTO14001
Posted By: dpaton
Date Posted: September 03, 2007 at 6:08 PM
Unless you're running it near the exhaust manifold, just make it out of PVC. Less heat transfer, crazy easy to build, and reasonably reliable. If you don't like the look, then 'glass over it, but for the core, use PVC.
 ------------- This is not a sig. This is a duck. Quack.
Posted By: jmelton86
Date Posted: September 27, 2007 at 1:58 AM
As long as no point in the tubing has a smaller diameter than the intake diameter (where the tube connects to the throttle body) then it's all good.
-------------
2013 Kia Rio -90a alternator
DDX470HD GTO14001 GTO1014D (x3)
Big3 in 1/0G
1/0G to GTO14001
Posted By: mr beta
Date Posted: September 30, 2007 at 12:33 AM
Doesn't PVC give off toxic fumes when heated to high temps?
Posted By: CapSS92
Date Posted: October 01, 2007 at 4:10 AM
I agree. If you just use fiberglass, it's gonna fall apart.
Posted By: dpaton
Date Posted: October 01, 2007 at 6:12 PM
mr beta wrote:
Doesn't PVC give off toxic fumes when heated to high temps?
Yup, but as long as it's not close to the exhaust, it's fine. The pic I posted is my engine bay, and it's been that way in 120 degree days in full sun for hours at high speed. The PVC never got warm enough to deform, which is around the same temp that the nasty fumes get released. ------------- This is not a sig. This is a duck. Quack.
Posted By: mr beta
Date Posted: October 02, 2007 at 12:11 AM
Cool beans. Just heard that. Didn't know what temp the fumes were released at. How's the pvc intake work?
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