Re: [T3] Part and # questions....

[Steven Ayres <comwest@well.com>]

Chad=> right rear of the engine bay ... little gizmo ...lever pops up 
=> ... round weight makes it fall back down. ... little door on top ... 
=> why this is ....

VW 1600 Karmann Ghia Owner's Manual ('66): 

  The warm air control flap should be checked each time (you check the 
  air cleaner) for freedom of movement. This flap regulates the flow of 
  pre-heated air to the carburetor (sic) in conjunction with the speed 
  of the engine.

This is a standard part on early T3s. There are actually two flaps, one 
on the weight and one on the hook. 

At low rpm, the weighted flap keeps the the normal intake somewhat 
closed off and the carbs instead draw air from the #1 heat exchanger, to 
lean the mixture a little and minimize carb icing, as I understand it. 
At the same time, the other flap (the one you can see) drops down to 
allow air from the engine compartment (also warm) to fulfill additional 
air needs. If the body intake is blocked, for instance by the snow you 
forgot to brush off, it will stay open to the engine compartment at 
higher rpm as well.

Bring up the revs and they both open, mainlining air from the 
body intake and closing off the heat-exchanger connection. In summer, 
snap the hook up to keep the visible flap out of the way and your intake 
air a little cooler at idle. 

I've never seen any testing results on whether this gizmo makes a real 
difference, but I think it's cool. 

Steven Ayres, Prescott AZ
'66 T3 Ghia

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