[T3] TB info?

[Jim Adney]

On 13 Mar 2022 at 0:58, Max Welton wrote:

> So this TPS does not have the functionality the megasquirt needs. I can
> adapt a modern 3-wire like I did before.
> 
> https://www.thesamba.com/vw/gallery/pix/2270220.jpg

Like you did before? Is this a 2nd car? What does the megasquirt need?

> Now, how about the sensor that comes in from the left side? That is a
> thermistor, right? Any chance you have some data points I can use to
> calibrate it?

IAD temp sensor:

    860-1200 Ohms at 14 F

    250-340 Ohms at 68 F

    90-130 Ohms at 122 F

Cyl head temp sensor

    7-12 kOhms at 14 F

    2-3 kOhms at 68 F

    680-1000 Ohms at122 F

There's a rather wide range/tolerance on these, but note that if you plot them 
on semilog graph paper, you get a straight line. That is helpful if you want to 
predict values at intermediate or warmer temps.

> https://www.thesamba.com/vw/gallery/pix/2270218.jpg

I have good temp sensors if you need a better one.

-- 
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Jim Adney, jadney at vwtype3.org
Madison, Wisconsin, USA
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