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Old 09-28-2019, 08:31 PM   #616
remski
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Member#: 151895
Join Date: Jun 2007
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Here we see a great example of 26 year old wiper arm.
For all its age and how its been beaten by the weather its still not bad.




Here we see such specimen taking a bath in Phosphoric acid mixture.
I think total of 2hrs was required.




Primed and 3 coats of paint... 15 min interval between coats and the **** still runs.



Next on list was a feature I wanted to add for a long time. I've read in few posts that said it's not possible and few other complained as well.
So after a short test.. 2 additional leads were created.




After fiddling around with scaling, the ECU now sees oil and fuel pressure off the Defi gauges.
Super stoked about this!!!
Now I can log both and include those in the "Engine Protection" features of the ECU.
Basically limit rpm or kill engine if oil pressure drops below X amount.
And drop boost if fuel pressure varies within X during boost.




For those that dont know about scaling..
in a nutshell...
you tell the ECU the voltage at 0 psi and the voltage at a 2nd known reference point.. 52PSI for fuel in this case.
since most sensors are linerar ..
based on that you interpolate the values in between and extrapolate beyond your 2nd reference point.
So with in tank pump on I get .3 bar on my gauge which is 8.7psi (@0.8V) and 52psi at 2V when is my 044 is on.
At boost there will be more than 52psi so the rest is extrapolated up to 100psi.

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