Welcome to the The Garage Journal Board forums.

You are currently viewing our boards as a guest which gives you limited access to view most discussions and access our other features. By joining our free community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!

If you have any problems with the registration process or your account login, please contact contact us.

Go Back   The Garage Journal Board > The Tools > Fabrication & Techniques

Sponsored Links (Register now to hide all advertisements)

Reply
 
Thread Tools Search this Thread Display Modes
Old 03-04-2012, 11:06 PM   #1
FastKat
Senior Member
 
Join Date: Jan 2010
Posts: 399
Default Can you bend rubber hoses with a heat gun?

I am trying to piece together an intake setup for my hotrod using large rubber hose. When I say intake, I mean everything between the throttle body and the air cleaner. I have used large rubber intake hose (4" ID) in the past and it worked well. With my new setup, I need some weird bends, which would require modifying a couple rubber pieces.

Has anyone ever successfully used a heat gun (or any other method) to permanently bend a rubber intake hose? Here is the kind of thing I am talking about:



I would start with this 90 degree bend and add about 20 degrees to it (flatten the bend by 20 degrees so it is a little straighter.) Also, I want to flatten the big end out to more of an oval shape, too.

Is this something you can do with rubber hose? Or will the heat ruin the hose and make it unusable?
FastKat is offline   Reply With Quote
Old 03-04-2012, 11:14 PM   #2
dadsEH
Senior Member
 
dadsEH's Avatar
 
Join Date: Oct 2010
Location: Melbourne AU
Posts: 1,657
Default Re: Can you bend rubber hoses with a heat gun?

Rubber hose is a thermal cure process... once its cooked and taken a formed shape thats it brother.
__________________
My 2013 EH pedal car build......http://www.garagejournal.com/forum/s...d.php?t=185657
My 2012 pedal car resto.....
http://www.garagejournal.com/forum/s...7&postcount=35
dadsEH is offline   Reply With Quote
Sponsored Links (Register now to hide all advertisements)
Old 03-04-2012, 11:54 PM   #3
bmxr4life87
Senior Member
 
bmxr4life87's Avatar
 
Join Date: Mar 2009
Location: Bixby Oklahoma
Posts: 839
Default Re: Can you bend rubber hoses with a heat gun?

What about using some exhaust tube for the straight runs?
bmxr4life87 is offline   Reply With Quote
Old 03-05-2012, 12:04 AM   #4
dadsEH
Senior Member
 
dadsEH's Avatar
 
Join Date: Oct 2010
Location: Melbourne AU
Posts: 1,657
Default Re: Can you bend rubber hoses with a heat gun?

" I am trying to piece together an intake setup for my hotrod using large rubber hose.I mean everything between the throttle body and the air cleaner"

Hotrods dont have no throttle bodies!
__________________
My 2013 EH pedal car build......http://www.garagejournal.com/forum/s...d.php?t=185657
My 2012 pedal car resto.....
http://www.garagejournal.com/forum/s...7&postcount=35
dadsEH is offline   Reply With Quote
Old 03-05-2012, 12:06 AM   #5
nso123
Member
 
nso123's Avatar
 
Join Date: Sep 2011
Location: Dunlap, TN
Posts: 76
Default Re: Can you bend rubber hoses with a heat gun?

If you are just needing a slight bend, you could use a section of silicon hose between the tb and the plastic hose.
nso123 is offline   Reply With Quote
Old 03-05-2012, 01:05 AM   #6
ford.crazy
Junior Member
 
Join Date: Jan 2011
Location: P.A.
Posts: 17
Default Re: Can you bend rubber hoses with a heat gun?

You could use a unicoil from gates. Not sure what sizes they have, but I used it on a few heater hoses and it worked to keep the shape I wanted under the hood. You can almost make any shape you need. http://www.gates-unicoil.com/gallery_eng.cfm
ford.crazy is offline   Reply With Quote
Old 03-05-2012, 10:38 AM   #7
FastKat
Senior Member
 
Join Date: Jan 2010
Posts: 399
Default Re: Can you bend rubber hoses with a heat gun?

Quote:
Originally Posted by dadsEH View Post
Rubber hose is a thermal cure process... once its cooked and taken a formed shape thats it brother.
Ahh, yea, that's what I was afraid of!

Quote:
Originally Posted by bmxr4life87 View Post
What about using some exhaust tube for the straight runs?
I was thinking about that, but I have to make two sharp bends in a pretty short amount of space. I don't know if I'll be able to get any straight runs in at all!

Quote:
Originally Posted by dadsEH View Post
Hotrods dont have no throttle bodies!
Haha yea, I guess it would be more of an "E-rod" then!

Quote:
Originally Posted by nso123 View Post
If you are just needing a slight bend, you could use a section of silicon hose between the tb and the plastic hose.
Does silicon hose bend easier than rubber? Can it be manipulated with heat?

Quote:
Originally Posted by ford.crazy View Post
You could use a unicoil from gates. Not sure what sizes they have, but I used it on a few heater hoses and it worked to keep the shape I wanted under the hood. You can almost make any shape you need. http://www.gates-unicoil.com/gallery_eng.cfm
I just don't think I have enough room to put one of those in, even if I can find it in a 4" ID. I will keep that in mind for my heater hoses... they're coming up on the list!

I am going to have to take another good look at this and reevaluate. I might have enough room to use a 45* bend and a 22* bend, or if I want to go the other direction, and 90* bend and a 22* bend. It's no ideal, but it might be necessary to make it work.
FastKat is offline   Reply With Quote
Old 03-05-2012, 11:31 AM   #8
NUTTSGT
Super Moderator
 
NUTTSGT's Avatar
 
Join Date: Sep 2009
Location: Bucyrus, Oh
Posts: 17,913
Default Re: Can you bend rubber hoses with a heat gun?

When I worked at Dayco Swan, we made radiator hose (my job) and other formed rubber hose. It was cured in a vulcanizer at 90 psi/ 330 for about 20 minutes. I doubt you can duplicate that at home. They always told us that hose has a memory, once it's cured a certain way, it wants to go back to that position.
__________________
ERIC

Too much is.... Just enough.

My garage refurb thread.
http://www.garagejournal.com/forum/s...ad.php?t=75024


Are you military or prior military ? Please visit OUR thread and post your experience.
http://www.garagejournal.com/forum/s...ad.php?t=64422


Take a look what your USA honorable service may have done for you.
http://www.garagejournal.com/forum/s...d.php?t=100237
NUTTSGT is offline   Reply With Quote
Old 03-05-2012, 06:55 PM   #9
RPH
Senior Member
 
Join Date: Dec 2006
Location: Michigan Thumb
Posts: 1,066
Default Re: Can you bend rubber hoses with a heat gun?

Cut miter joints and glue it together.
RPH is offline   Reply With Quote
Old 03-05-2012, 07:08 PM   #10
raley
Member
 
Join Date: Dec 2010
Posts: 86
Default Re: Can you bend rubber hoses with a heat gun?

I can't remember the same of the "tape" but you can basicly wrap something (paper wadded up) and then tape it, heat gun it, and you have a tube, its some sort of rubber tape.
raley is offline   Reply With Quote
Old 03-05-2012, 07:28 PM   #11
Frank The Plumber
Senior Member
 
Frank The Plumber's Avatar
 
Join Date: Feb 2011
Location: Chicago.
Posts: 2,648
Default Re: Can you bend rubber hoses with a heat gun?

Quote:
Originally Posted by dadsEH View Post
" I am trying to piece together an intake setup for my hotrod using large rubber hose.I mean everything between the throttle body and the air cleaner"

Hotrods dont have no throttle bodies!
True Hotrods don't have hoses that are bent either.
Frank The Plumber is offline   Reply With Quote
Old 03-05-2012, 09:32 PM   #12
jweller
Member
 
Join Date: Feb 2007
Posts: 97
Default Re: Can you bend rubber hoses with a heat gun?

Quote:
Originally Posted by raley View Post
I can't remember the same of the "tape" but you can basicly wrap something (paper wadded up) and then tape it, heat gun it, and you have a tube, its some sort of rubber tape.
silicone tape. pretty cool stuff.


OP - sounds like you are going to have pretty serious bend in your intake track. Have you considered another option for routing? that is not optimal for flow.
jweller is offline   Reply With Quote
Old 03-05-2012, 10:46 PM   #13
FastKat
Senior Member
 
Join Date: Jan 2010
Posts: 399
Default Re: Can you bend rubber hoses with a heat gun?

Thanks again for the info.

Lots of hotrod hate! Maybe it's not a true hotrod...whatever... check out my website and call it what you want! http://www.buyrcars.com/jag.htm

Here is a picture of my current intake setup:


I have one of these:


The new throttle body is offset to one side and turned away from center about 30 degrees.

I really have two options: A) Use my current intake, which pulls cool dense air from a positive-pressure location outside the engine bay, or B) Pull hot air from a negative-pressure location inside the engine bay. Option B will allow me straight short air intake path, and option A will required a couple bends. Neither solution is ideal.

Also, somewhere in between the throttle body and air filter, I need to put the mass air flow sensor.

So tell me more about this silicone tape! EDIT: Oh wait, I get it now, it's silicone tape and you're making your own silicone elbow.

Last edited by FastKat; 03-05-2012 at 11:04 PM.
FastKat is offline   Reply With Quote
Old 03-05-2012, 11:53 PM   #14
nso123
Member
 
nso123's Avatar
 
Join Date: Sep 2011
Location: Dunlap, TN
Posts: 76
Default Re: Can you bend rubber hoses with a heat gun?

They make silicone tubing. We have used it on turbo installs when using v-bands and aluminum tubing was not convenient. The silicone is very soft and easy to manipulate. They also make different bends, reducers, etc.
nso123 is offline   Reply With Quote
Old 03-06-2012, 12:17 AM   #15
FastKat
Senior Member
 
Join Date: Jan 2010
Posts: 399
Default Re: Can you bend rubber hoses with a heat gun?

That sounds really great! I am having trouble finding 6" ID silicone tubing though - that's the size I need for that air cleaner. Does anybody make really big ones? I was looking at siliconeintakes.com - they have a really good selection, but nothing that big.

Quote:
Originally Posted by nso123 View Post
They make silicone tubing. We have used it on turbo installs when using v-bands and aluminum tubing was not convenient. The silicone is very soft and easy to manipulate. They also make different bends, reducers, etc.
FastKat is offline   Reply With Quote
Old 03-06-2012, 03:03 PM   #16
JamieK
Senior Member
 
Join Date: Aug 2009
Location: Winston-Salem, NC
Posts: 1,462
Default Re: Can you bend rubber hoses with a heat gun?

Found this after a little help from Google. I know nothing about the company, except they have what you want. And its $$$!

http://www.hiprospeed.com/HPS-6-Sili...-Hose-s/85.htm

Another thought is that it looks like the boot you already have on the car would flex enough to hook up to the angled throttle body. You'll just have to move the air filter off center.

Last edited by JamieK; 03-06-2012 at 03:07 PM.
JamieK is offline   Reply With Quote
Old 03-06-2012, 03:37 PM   #17
Crusty Nut
Senior Member
 
Crusty Nut's Avatar
 
Join Date: Mar 2008
Posts: 475
Default Re: Can you bend rubber hoses with a heat gun?

Lots of good stuff here. They had what I needed for my hot rod.
http://www.intakehoses.com/
__________________
Singley Speed Shop

707-599-2315


I am a tool user, not a tool polisher
Crusty Nut is offline   Reply With Quote
Old 03-06-2012, 10:54 PM   #18
nso123
Member
 
nso123's Avatar
 
Join Date: Sep 2011
Location: Dunlap, TN
Posts: 76
Default Re: Can you bend rubber hoses with a heat gun?

Here is an example. The stuff is pricey, but you can buy it by the foot. We have it available at a local hydraulic supply store.

nso123 is offline   Reply With Quote
Old 03-06-2012, 11:01 PM   #19
Deception
Senior Member
 
Join Date: Jan 2012
Location: New York
Posts: 114
Default Re: Can you bend rubber hoses with a heat gun?

doesnt answer your question, but I fabbed my supercharger intake with couplers & pipes from http://siliconeintakes.com/
Deception is offline   Reply With Quote
Old 03-07-2012, 02:56 PM   #20
jweller
Member
 
Join Date: Feb 2007
Posts: 97
Default Re: Can you bend rubber hoses with a heat gun?

You know the other thing I've seen done is to use regular straight couplers and fab a bend up out of tube using pie cuts. It is a LOT of work, but looks very impressive when done well. I don't know if you weld or not, that might be the deciding factor.



Thats fabrication porn to me.
jweller is offline   Reply With Quote
Old 03-07-2012, 07:17 PM   #21
NUTTSGT
Super Moderator
 
NUTTSGT's Avatar
 
Join Date: Sep 2009
Location: Bucyrus, Oh
Posts: 17,913
Default Re: Can you bend rubber hoses with a heat gun?

Quote:
Originally Posted by jweller View Post
You know the other thing I've seen done is to use regular straight couplers and fab a bend up out of tube using pie cuts. It is a LOT of work, but looks very impressive when done well. I don't know if you weld or not, that might be the deciding factor.



Thats fabrication porn to me.
That is some serious fabwork there. I wonder how many hours went into that ?
__________________
ERIC

Too much is.... Just enough.

My garage refurb thread.
http://www.garagejournal.com/forum/s...ad.php?t=75024


Are you military or prior military ? Please visit OUR thread and post your experience.
http://www.garagejournal.com/forum/s...ad.php?t=64422


Take a look what your USA honorable service may have done for you.
http://www.garagejournal.com/forum/s...d.php?t=100237
NUTTSGT is offline   Reply With Quote
Old 03-13-2012, 07:54 PM   #22
FastKat
Senior Member
 
Join Date: Jan 2010
Posts: 399
Default Re: Can you bend rubber hoses with a heat gun?

Quote:
Originally Posted by jweller View Post
Wow, that is really really nice. I can weld, but not that well! Maybe I could do something similar, but a little less intense.
FastKat is offline   Reply With Quote
Sponsored Links (Register now to hide all advertisements)
Old 03-15-2012, 08:38 PM   #23
91bronc300
Senior Member
 
Join Date: Oct 2009
Posts: 2,338
Default Re: Can you bend rubber hoses with a heat gun?

That........is..........awesome! Wow. That's a real craftsman whoever did that.
91bronc300 is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Sponsored Links (Register now to hide all advertisements)


All times are GMT -5. The time now is 08:01 PM.