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mattlutz Samba Member
Joined: February 28, 2012 Posts: 4 Location: HAMBURG,PA.
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Posted: Tue Feb 28, 2012 12:23 pm Post subject: Pre heater tubes on classic vw beetle intake off of carb |
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can the pre heater tubes be cut off and welded shut on the 1600 motors that come off the long flange from the carb on a dual port and goes to the exhaust then without negatively affecting the motor.? |
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anthracitedub Samba Member
Joined: June 20, 2007 Posts: 3241 Location: Michigan
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Posted: Tue Feb 28, 2012 12:39 pm Post subject: |
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You should do a search on preheat tubes and read up on this topic... I think you'll find that keeping them will be beneficial. |
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Nevada Notch Samba Member
Joined: May 02, 2005 Posts: 540 Location: Carson City Nevada
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Posted: Tue Feb 28, 2012 1:47 pm Post subject: |
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This section of the intake manifold serves 2 functions.
1.) It channels hot air through the bottom of the center section of the intake runner and it keeps the intake from icing over in the cold weather. When the runner ices over it will cause acceleration stumbling when transitioning from idle. The accelerator pump does not atomize fuel, it squirts it like a squirt gun. These droplets of fuel do not atomize until they hit the bottom of the hot intake runner.
2.) It also serves as a support for the center section of the intake runner. If you were to cut these off, you will have to brace the center section of the manifold due to the pull of the throttle cable. _________________ 1966 Euro
1600DP
Dual 34mm ICT's
99% Resto-Custom Daily Driver |
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KTPhil Samba Member
Joined: April 06, 2006 Posts: 34009 Location: Conejo Valley, CA
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Posted: Tue Feb 28, 2012 5:15 pm Post subject: |
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Are you running an aftermarket muffler/header that lacks the proper connections for the heat riser? |
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61SNRF Samba Member
Joined: March 29, 2009 Posts: 4657 Location: Whittier 90602
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Posted: Tue Feb 28, 2012 6:14 pm Post subject: |
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Do you mean this pipe (lower red arrow)?...
Photo from the Gallery thanks to shakers73 _________________ -Bruce
An ounce of prevention is worth a pound of cure. |
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mattlutz Samba Member
Joined: February 28, 2012 Posts: 4 Location: HAMBURG,PA.
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Posted: Tue Feb 28, 2012 6:20 pm Post subject: |
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61SNRF wrote: |
Do you mean this pipe (lower red arrow)?...
Photo from the Gallery thanks to shakers73 |
no its the one that comes from the intake tubes off carb but goes to exhaust the small dia tube on left and right..the one in your pic behind the aluminum heater hose |
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mattlutz Samba Member
Joined: February 28, 2012 Posts: 4 Location: HAMBURG,PA.
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Posted: Tue Feb 28, 2012 6:22 pm Post subject: Pre heater tubes on classic vw beetle intake off of carb |
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not where the red arrows are ..the small dia tubes that bolt on to the exhaust it comes off of the larger tubes from the intake of the carb on left and right side.. |
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mattlutz Samba Member
Joined: February 28, 2012 Posts: 4 Location: HAMBURG,PA.
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Posted: Tue Feb 28, 2012 6:24 pm Post subject: Pre heater tubes on classic vw beetle intake off of carb |
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in your pic its the silver rusted pipe to the left of the distributor |
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61SNRF Samba Member
Joined: March 29, 2009 Posts: 4657 Location: Whittier 90602
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Posted: Tue Feb 28, 2012 6:43 pm Post subject: |
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In that case Nevada Notch has answered your question as well as I or most can, and all the other comments relevant to pre-heat tube apply as well. _________________ -Bruce
An ounce of prevention is worth a pound of cure. |
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zzhayward Samba Member
Joined: June 01, 2005 Posts: 258 Location: Philomath, Oregon
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Posted: Tue Feb 28, 2012 11:30 pm Post subject: |
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In warm climes ( HI, SoCA, Mex) you can get away without carb heat. Cold morning or non warm climes you must have. Something about entropy and change of state from liquid to gas ((see physics of a refrigerator)) Ditto on the carb support need |
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KTPhil Samba Member
Joined: April 06, 2006 Posts: 34009 Location: Conejo Valley, CA
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Posted: Wed Feb 29, 2012 8:52 am Post subject: |
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Why do you want to do this?
Back to my question about what muffler/header you are running... |
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