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Re: [T3] Injector interchangability?

On Tue, 2003-12-02 at 22:50, Jim Adney wrote:

> The parts list shows 3 different head temp sensors.
> Only 2 of these are actual head temp sensors and they fit all type 3s, 4s, and 
> 914s. The only difference between them is the length of the wire. 68-9 got a 
> long wire while all the others got a short wire, just because of where it is 
> mounted. Later, the only replacement that VW sold was the long wire version, so 
> this was sold for all of these applications.
> There is a third number listed, for special circumstances, but even though it 
> is listed as a temp sensor, it is actually just an in-line resistor to be added 
> in series with the actual temp sensor.
> The tolerances on the temp sensors are quite loose, so it's quite possible to 
> get perfectly good sensors which still have a rather wide range of resistances 
> at the same temp. I don't think I have any literature that talks about other 
> cars with actual numbers, so I can't say what their resistance range is.
> I thought the copper washer was just there to provide a soft washer that had 
> good conductivity and would seal the threads to prevent corrosion. Every 
> undisturbed-from-the-factory engine I've ever taken apart has had one of these.
Yupppp, I agree with Jim on this one. And the pressure regulator should
be able to go to 40 psi with no problems. I run my '71 1600cc at 32psi
all the time. The pump is capable of over 65 psi. 
The resistor was a 250 ohm resistor. And I do have one around here if I
can ever find it.
If you try to make your own, cut the solid leads short, solder on
stranded wire leads. Then "Pot" the solder connections in epoxy or
something similar. Male 1/4" spade connector on one end, and female on
the other.

Russ Wolfe
'66 FB MT
'71 FB AT 
'65 Bug (not running)

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