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Building Integrity
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Date:  7-4-2018
Number of Hours:  1.00
Manual Reference:  Section 2
Brief Description:  ECU hack update with good news

After yesterday's IAT sensor mod was a big let down, I went back to the airport today with my laptop which had the UL Power UL Check software loaded. I was going to be able to see whether or not the 10K Pot was actually doing anything. I plugged the laptop into my ECU and connected the pot to the IAT sensor. As I began turning the pot I saw the temp reading begin to change rapidly. It wasn't a linear change, but much more exponential than I realized. I also found that it was only affective up to about 8k after which didn't change much. I also noticed that the pot was not wired to LEAN the mix, when turning clockwise, which is what I was going for. So I went ahead and changed the wiring so that now a clockwise turn raises the sensor temp reading and therefore leans the mixture. Now, was this going to actually work? Let's find out.
I fired up the engine with the intent to go WOT on the ground for a full power static runup well after the engine was good and warm. The fuel flow data on the UL check software was changing slightly when I turned the pot! Yes! I then went to full power and noticed I could lean my mixture even more noticeably, yet still not in any large amounts. This has confirmed that YES, the mod works, and does not affect the power or smoothness of the engine. The next step will be to run the wires through the firewall and test fly the mod. I'm hoping that at altitude when the RPM comes up and the OAT drops to about 55-60F, the change in mixture becomes even more pronounced. Currently the ECU limits a 140deg. sensor reading and today's OAT was already 90. Needless to say I'm all smiles so far :)
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10k Pot changes the IAT reading

10k Pot changes the IAT reading

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Correctly wired and test running

Correctly wired and test running

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These black pipes have to go

These black pipes have to go

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