Re: LS Conversion Complete
The Mast ECM handles drive-by-wire and operates the VVT. It uses two wideband O2 sensors, one for each cylinder bank and is self programming. We started with the equivalent of a 2010 Camaro L99 tune, modified for headers, and the ECM takes it from there. No trips to a tuning shop were needed. Fired it up Memorial Day weekend and was on the Power Tour a week later.
It also does not require a VSS signal and does not use a MAF sensor (MAP only), which simplified intake tract plumbing. Finally, it is capable of handling a cruise control function, although it is not supported in the current software version (I hope this is eventually supported).
I had other reasons for buying the Mast ECM as well. They sell VVT cams and they have developed tunes for their cams from their own dyno testing. I buy the cam, install it and they give me the tune - one stop shop. Also located about two hours from me, so if I ever have a problem, they are relatively close.
Support was good. There was an initial hiccup on the tune that was in the ECM when shipped, but it was quickly ironed out with a new one.
1969 Camaro - Intense Blue Pearlcoat/white (Baldwin-Motion paint scheme), stock 6.2 liter L92 with VVT, LS3 intake, Doug's Headers; Tremec TKO, 3.73 12-bolt posi.