I also have an electric fuel pump and inline pressure regulator on my 411, and a reduction gear starter motor which spins the engine quite quickly. The engine starts easily even when it has been standing unused for months. When it's warm it starts the instant I turn the key.
I have also seen a 412 that used an electric pump to prime the fuel supply to the carb initially then it ran on the original mechanical fuel pump once started.
Good advice Geoff about applying a small amount of throttle when starting the V8 engines when they are warm. That was recommended to me and was required with the original set up, although I find I don't need to do it now with my modern accouterments!
For what it's worth Lee, it's not just us V8 Bristol owners who encounter starting problems, plenty of Mopar owners in the US have the same problems and many opt for the electric fuel pump and/or modern starter motor.
It's probably worth mentioning the carburettor also. If it's the original on the 408, it probably needs a full overhaul. But it's likely it has been changed at some point. After I bought my 411 I discovered the carb was incorrect for the engine (too small) which added to my starting woes.
Another thing to bear in mind is that ignition coils don't like heat, and a coil that works fine when cold can become unreliable when hot. It goes without saying that clean, correctly gapped spark plugs and sound ignition leads also help.
However, from your description Lee it sounds like a fuel supply problem to me. We look forward to hearing how you get on.
Best regards,
Kevin
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