tony it depends what signal your tacho is expecting and what signal your ECU can output...

most modern aftermarket ECUs are switchable...

similar sort of thing to aftermarket tachos... theyre universal n you can flick them between normal spark/wasted spark/4cyl/6cyl etc. etc.

woulda thought that one of the ERST tachos woulda worked with DTA? ive seen a 2.0 ZT ERST using using normal clocks and DTA management