A couple of good points have been brought up in this thread. I know Chris, the original poster is on hold with the ECU swap. He did get some information from SC.
On resolving the other running issue, don't forget that even a new engine can have issues. In my case with my SC installation I had a bent valve that I did not discover until I went to re-torque the head. The basics have to be working properly before any fuel injection layered on can work properly.
Finding a tuner/configurator familiar with the details of the SC Typhoon and Delta ECUs is next to impossible in the US. It also sounds like it may not be that easy in the UK either. Just be sure to understand that it will take some work to get it running properly. Most tuners tune for maximum horsepower. We use our cars daily, so maximum horsepower tuning is not really needed. Our mileage around town has dropped, most likely due to running rich at lower engine temps and on short around the town runs. So a work in progress...
I only have direct experience with the SC system, but I did start out trying to use a Microsquirt based system. I ran into some issues with adapting Rover components and moved on to the SC system as it was "plug and play." A few years later I am still plugging and playing.
The problem with engine configuration comparisons is that they are never exactly the same. The SC systems allow the logging of data as a way to make real comparisons as modifications are made. This really does need to be done on a rolling road as seat of the pants meters are not accurate. SC have a new module for the Delta ECUs that allows data logging without a connected PC.
One thing I have learned is that the SU carburetor is a pretty amazing and forgiving device...
Edit: Just reread this as I composed it over a period of time. I did not really add any thing of value to the thread, but I do have two cars running with SC Typhoon computers. One with the SC TB and the other an HIF 44 with ignition only. We are planning a trip at the end of June with both. I will have more info then.
Edited by tmsmini, 31 May 2018 - 05:38 PM.