I feel I've made a big mistake selling my +8. Among the many small reasons that mounted up and urged me to sell the car, were a few niggles from the "big project". We have now sorted them out, and I'm just in from a test drive... it drives better than it ever has, and pulls like stink! (even with the Cats on that really slowed it down). We were having a few issues with the revs sticking, and so we re-fitted the standard ECU, and it revs, sounds and goes much better!
I always thought I would be able to get my Morgan fix in my dads, but it made it worse borrowing someone else's!
I think I will be buying another +8 sooner than I thought!
I would suggest You get away from the Rover +8 and go to the Roadster with its modern Ford V6 engine. As I am a DIY sort I am thinking of changing My +8 Bitsa from Rover to Ford. Not because My 3.9, carbed Rover does not lack performance, but because I feel in this day and age I should have a proper environmental propulsion plant. Also and engine that is being produced today rather than yesterday. I know the 3.9 V8 is a delight to drive and sounds like a V8. I have driven the Roadster V6, like it, but it is different for sure. With the V6 I learn to shift, and use the higher RPM's for power. But when I have engine troubles I can visit a Ford Dealership. This probably not a big deal in the UK where Rover has support. But in the NW Corner of the U.S. it is a Big Deal.
I have a junk yard 4.0 with Fuel Injection. Then I learned how difficult it is to convert the GEMS ECU to a Morgan and further if I decided to keep the 3.9 to use the GEMS unit. I certainly could not use the ECU. There are lots of ECU's that will run the engine. But I think it takes a Battalion of Engineers to design one that would do the job. Easier and cheaper to change engines.