MSgpio.com read only forums (Jan.15,2018)

Lance,

Did you ever make any progress on finding an alternative to timing retard for turbo app's?

Having the boost spike during a shift is not the best for the trans. I tore up a full billet built 4l70 last year. 4L80e going in soon.

This almost seems like an anti-lag in reverse...

Some possible ideas that come to mind are reducing torque by opening the wastegate further, opening a blowoff valve to dump boost, or grab a BMW ASC valve (basically a drive by wire throttle that is normally open, with the ECU closing it - the unit is put in series with a cable operated throttle body) and have it closed while shifting.