We have been working on a proper MAF conversion for E28, E30, E34, and similar VAM-equipped models. Our primary goal is to produce a MAF Conversion Kit (MCK) that does not require a retune, and that properly converts the MAF signal into a signal that the stock ECU is expecting to see. Currently, there are no MAF conversions on the market that performs these tasks. Yes, including that one!
Furthermore, in modern MAF-equipped ECUs, there are entire algorithms and coding sections dedicated to correctly reading, filtering, and smoothing the input. This code is absent on older, VAM-equipped ECUs and therefore in-order to properly feed the ECU a MAF signal, the maths and programming must be done externally. Our MCK uses a custom coded microprocessor along with circuit boards — designed in-house and made in America — that take care of these essential tasks.
After dozens of iterations, changes, updates, and improvements, we are nearing a release-ready product. However, due to the financial stress of the Vintage Roundel production, the release has been significantly slowed.