I' was forced into early retirement. All companies moved away, went out of business or downsized. Former Raytheon CEO was P&W FL President, Hansel Tookes. He got pushed aside when everything moved to CT, so went to Raytheon. He retired & lives a few miles down the road in a multi-million dollar home.
My friend has a '69 351C dead & rusting in the carport. Most guys wouldn't go EFI on a '71.
From what I understand, TwEECer has good hardware, but the software is very outdated. Also somewhat expensive compared to QH, but about the same as Megasquirt.
I'm a bit overwhelmed with all the different software choices & what each one of them does. Software developers never understand KISS. I had to direct a lot of their work because user learning curve was too steep & they never tested anything.
TunerPro - free (installed on my laptop), no delay on startup.
TunerPro RT -what does this do that the free version doesn't?
Binary Editor (installed on laptop), GUI is bad, can't see menu items, wouldn't pay for it.
EEC Analyzer (installed on my laptop), auto updated (must be supported)
EEC Editor - same as BE?
A few hardware questions:
What is the battery for on the QH?
The memory is volatile flash?
If the battery dies, the tune is lost?
Since battery is inside EEC, replacement requires removal & opening case.
Seems somewhat primitive compared to Megasquirt, but QH is less expensive.
They actually have 2 PnP's, the latest one is all contained in one box (shown above). One doesn't replace the other, they still offer them all.
DIYAutoTune has many different 5.0 kits & packages, so it can be less expensive.
Ford 5.0 Mustang Package Deals Megasquirt Kits / Assembled Engine Management Systems, Wideband o2 Sensor Systems and tuning products - DIYAutoTune.com
MS uses 1 software pkg for all which is free: Tuner Studio
ML Viewer is free, too. Versions for Windows-All, Linux & Android.
EFI Analytics Software Downloads | tunerstudio.com
It all depends what you started out with and are familiar with using now. I'm starting from scratch.