[T3] type 4 2000cc oil pressure and overheating problem
Bobsnotch at aol.com
Bobsnotch at aol.com
Sat Dec 10 07:07:15 PST 2011
In a message dated 12/10/2011 9:42:34 A.M. Eastern Standard Time,
jadney at vwtype3.org writes:
Also, I don't understand what it is about the Type 4 intake that
provides "forced induction." It's been years since I dealt with one,
and this is not an aspect I paid any attention to, but the Type 4
squareback louvers and ducting strike me as pretty much the same as
those in the Type 3 squareback.
The notch ducting is a lot more convoluted. Are you under the
impression that the area behind the notch rear window is a high
pressure region? Is this true? I wouldn't expect this, but I don't
know.
I agree. Especially when you look at the bus louvers, and that the lower
half of the engine is sealed in a bus, so it's just drawing in air from all
around the engine compartment (mixed hot and cool air).
If you look at the cooling slots under the rear window of a Notch, you'll
see that area is actually slightly smaller (surface area) than the 2 sides
of a Square, or Fastback. It's also a low pressure are like the front air
vent (in front of the windshield), so it's not pressurized. It (a Square)
should actually have better cooling air intake flow than a Notch. I don't know
IF you've ever looked inside the Notch cooling ducts before, but there's
actually dams inside the duct work. I don't know what they do, other than
maybe divert water toward the drains. But they do stand up to about 1/2 the
duct work. :O
What makes you think the t-3 fan is 2 stage? I know the belt pulley has
vanes in it, but I've always thought they were to straighten out the air flow
into the large fan.
Bob 65 Notch S with sunroof and IRS (Krusty)
71 Notch (Krunchy)
64 T-34 Ghia (Wolfie)
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