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Aaron_T
Dodge Dakota
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2/27/2004
11:42:56
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 Subject: Homeade intake - flexible connector
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With regard to homemade intakes, I have read a handful of threads in which concern was expressed over PVC or ABS not being able to tolerate underhood temperatures. I have not read any information doubting the plumbing coupling (aka Fernco connector) being able to handle under hood temperatures. Has anybody with a homemade intake experience problems with a plumbing connector failing?
I called Fernco and asked about the ambient temperature ratings of their connectors. Their response was that a standard Fernco connector (as I have seen in many pictures of homemade intakes) is rated at 120 degrees F consistent temperature or 140 degrees F intermittent. Granted they have a margin of safety factored in but that seems low. I assume underhood temperatures can easily reach 120 degrees F. I asked about higher temperature rated couplings and the Fernco guy said they make a Proflex series coupling that is rated at 200 degrees F consistent ambient temperature. Do underhood ambient air temperatures near the throttle body exceed 200 degrees F?
Check out this link:
http://www.cornerhardware.com/item_217058/Fernco/Fernco/Plumbqwik-3-X-3-Dwv-Proflex-Shielded-Specialty-C.html
More expensive ($7.07 each) but this product seems more appropriate for the application (unless you consider attaching a plumbing fitting to the throttle body of a vehicle completely inappropriate to begin with).
Any thoughts?
Does anybody know where to buy 3" silicone connectors at a reasonable price? These are the connectors I've seen on intakes for sale. I have not been able to find them for less than $25 a piece.
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73duster
Dodge Dakota
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2/27/2004
13:57:56
| RE: Homeade intake - flexible connector
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mcmastercarr.com
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another mark
Dodge Dakota
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2/27/2004
14:38:57
| RE: Homeade intake - flexible connector
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If you are concerned about plastics breaking down then use
sturdy dryer ducting or heater ducting, not the flexable tinfoil
stuff though. I have a homebrew PVC intake, have had it on for
4 years now and I'm not suffering from anything nor is their any
damage at all to the tube from heat. Our airhats are made out
of plastic, the fan shroud is made out of plastic as is the airbox.
I think it's a bit paranoid to worry about such a thing. Ranks up
there with getting struck by lighting if you ask me. JMHO
though.
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TexasTodd
Dodge Dakota
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2/27/2004
14:54:49
| RE: Homeade intake - flexible connector
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Use a fernco connector, plumbing section at HOme depot.
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DSW
Dodge Dakota
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2/27/2004
16:07:10
| RE: Homeade intake - flexible connector
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Use the $3 Fernco from Home Depot. Had mine on for 1 1/2 years and it's in great shape, no splitting, cracking or warping. Guess you could say I have stress tested it, 120+ degrees temperatures outside during the summer and the rubber connector isn't deteriorating.
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GraphiteDak
GenIII
2/27/2004
16:33:25
| RE: Homeade intake - flexible connector
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I have a "no hub" connector used to connect two steel drain lines together. It costed over $5 at Home Depot.
No problems with it yet.
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TexasTodd
Dodge Dakota
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2/27/2004
17:29:50
| RE: Homeade intake - flexible connector
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My fernco hasn't melted-at all, 3+ years, Hot Houston weather.
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DSW
Dodge Dakota
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2/27/2004
18:03:57
| RE: Homeade intake - flexible connector
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I think the reason that Fernco has these rated at 120 degrees constant and 140 intermittant is that their intended use is for plumbing. Hottest it gets in the desert is 125 maybe 127-128, never seen it at 130.
What the heck these are plumbing fittings, not automotive parts. It's a cheap substitute for a quality automotive part. Hmmm, $3 for the fernco or $25 for a silicone connector. I liked the $3 price much better for my homebrew air intake experiment.
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Nips
Dodge Dakota
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2/27/2004
19:32:38
| RE: Homeade intake - flexible connector
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Why do you want to open the hood of your truck to expose a home made hunk 'o Shiznit!! Spend the money on a quality made piece and be proud to show it off. Paaaaleeeeezzzzz!!
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Aaron_T
Dodge Dakota
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2/27/2004
19:43:48
| RE: Homeade intake - flexible connector
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Thanks for the empirical evidence that the Fernco connectors are able to withstand underhood temperatures without ill effects. For me, it will be worth a few extra bucks to buy the Fernco Proflex coupling instead of the standard Fernco rubber coupling.
I will post pictures when I complete my intake system, I believe it will be different than other systems displayed in this forum.
Thanks again!
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GraphiteDak
GenIII
2/27/2004
20:38:03
| RE: Homeade intake - flexible connector
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This is funny. When you were talking about the Fernco fitting I thought that was a TYPE of fitting. It turns out that Fernco is the brand name who makes NO HUB fittings.
Today I was looking at a extra one I had and check out the label on it...
And here is one installed on my truck. They cost more than $3 at Home Depot. I think they were at least $5
I didn't make mine to SHOW OFF to others. That is what RICERS buy. Overpriced pieces of exhaust pipe with a open element filter hanging off of the end. No thanks. I'll have more fun making my own and using the extra money for REAL performance.
I don't think you can feel much of a difference with aftermarket intakes anyway. One reason I made mine was to get the original air hat out of the way so I can SEE the top of the engine when I want to.
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bubba
Dodge Dakota
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2/28/2004
11:00:38
| RE: Homeade intake - flexible connector
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Is that tin foil?
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billy
Dodge Dakota
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2/28/2004
11:12:33
| RE: Homeade intake - flexible connector
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that tin foil has all sorts of uses i did all of my trailer winows with that stuff. it only cost me bout5.00. my wife says that i should do my dodge pick-up
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GraphiteDak
GenIII
2/28/2004
12:12:35
| RE: Homeade intake - flexible connector
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Message:
No. It is foil backed insulation used to wrap water heaters!
It LOOKED alot better before I handled it so much. I took that pic yesterday just to show the NO HUB connecter. I am planning on taking it off and cleaning it back up a bit.
One thing about intake tubes. The first one I built, as shown in my avatar by my member name, was one piece going behind the fog light with a open element K&N filter clamped on.
It was LOUD AS HE11 inside the cab when over 3000 RPM's. Not something I liked listening to on trips, etc. Plus, I have been going off road occasionally so I didn't want my filter getting into the deep water puddles, stream crossings and sucking up some nasty water!
So, I re installed my stock filter box with the drop in K&N and run my tube from there to the throttle body. It works just as good, wont suck water, and I like it better than the stock air hat which prevented you from seeing the top of the engine.
I'll take a new picture after I re do it later.
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