On a similar ish note, if I was to go efi I assume hotwire is definitely the way to go, found a really nice flapper setup for £100 locally or a not as nice but okay 14cux hotwire setup off a rrc for £250 (everything I need apart from gaskets for both). Worth going for the hotwire I'm guessing? That sort of money is the same I was going to spend on getting the carbs tuned, might aswell go efi.
My engine was an original 84 factory 3.5 V8. It had stromberg carbs in need of a tune, so I elected.to fit an EFI (14CUX) Hotwire Injection system.
I replaced the camshaft and followers, and checked set preload, new and timing chain etc.
I didn't think an expensive cam would be worth it with my low CR engine, so fitted an OEM 3.9 one.
Converting to EFI is a job of work. I did it in about 4 weeks.. I used a hotwire setup from a 3.9.disco.
There is plenty of information available on the 14cux system. Rover guage is a helpful tool.
If I were you I would fit a fresh cam, and make sure your ignition components are giving a good strong spark. Mine was poor, replacing.the distributor with a good second hand unit and new vacuum advance made a good improvement.
I wish I'd done the ignition refurb before changing to EFI - so that I could have seen the differences with each step.
I use my V8 purely for fun, so don't worry too much about economy. I was more interested in reliability and torque. It now starts very easily cruises at 80. (Euro motorways /disco transfer gearing).
I would like a bit more torque, so may rebuild a 3.9 or a 4.6, but for now, it's staying as is.
