I'm in Seattle and am investigating whether there could be a scaleable business converting platforms like the E30 into electrics while keeping their driving dynamics robust and authentic. Like zelectric.com - but without the premium prices and/or long wait list.
If you're interested in chatting further, I'd love to hear your thoughts on the E30 as a platform.
I replied to you by PM, but it seems you may not have access to that. So here's what I said:
I think an electric conversion makes more sense on infrequently driven vehicles with frequent or prohibitively expensive reliability problems.
So, classic cars older than 40 years old where all the rubber lines and seals are failing, oil leaks, fuel leaks, finicky carburators, etc. Like these old Alfas.
Or, top-tier cars with very expensive drivetrains, like air-cooled Porsches, any Ferrari, old Jags and Astons, etc., cars whose owners are more interested in the style and coachwork and want to be able to continue driving the car even when qualified mechanics or access to gasoline disappears.
As for the e30 BMW, I don't think it's the best candidate (yet) for a conversion. The cars are still cheap to acquire (less than $10K), and easy to own and operate, thanks to a durable drivetrain (often over 200K miles). And the drivetrain is so good and cheap, you need a pretty compelling reason to replace it. I replaced mine for a modified, stronger engine. If you can get the equivalent of 300+ HP (or torque) electric conversion for the cost of an S52 transplant, then you might be in business. Hope this helps. Good luck!
Sorry for the hijack. Things look like they're going well on this Spider conversion. I continue to follow with anticipation!