[T3] TB info?
Jim Adney
jadney at vwtype3.org
Sun Mar 13 09:18:17 PDT 2022
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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