map sensor cheating?

[decryphe]

(08-20-2025 05:48 PM)Ivan141 Wrote:  I doubt there is a cheap and easy way to fix it.
That being said, I have a hobby project that is basically a PCB with 4 individual MAP sensors on it, that would then be connected to each runner individually.
The thing with ITB's is that only 1 cylinder at a time is creating a decent vacuum signal, if you T them into a small vacuum manifold you are basically dampening the signal out and it will still not resemble a proper plenum. The idea with the 4 sensors is to pass along the strongest signal at any time, which should result in a much more robust signal.

Anyhow, I've put my first prototype together and as is the tradition it has been a massive pain in the ass. Put on any single sensor and it works fine, put 2 or 3 and it works fine. Put on 4 and 1 sensor starts tripping balls. Have put it away for the summer as finding the cause of these issues can be frustrating.
If I can iron out the issue, you could in theory make it output any kind of signal you want as long as its between 0 and 5 volts as I have a microcontroller on the board.

That's also an interesting option. My first actual engine building experience will now either be the KE10 engine or an ITB+EFI conversion of a '71 Beetle 1302. There's some pretty cool EFI swaps for that engine, and getting the reliability and fuel economy of an EFI setup in the Beetle would be amazing. Building something that can deal with 4 or 6 cyl ITB setups would be great, as my dream build is to put ITBs on a 2JZ-GE.

Do you have any of the project info on Github or something? I'd like to have a look, actually.