Yes, my alternator is oversized. It was free, so I can't complain.
6hp roughly equates to 4.5kw. I can just about pull 4kw measured electrical - but the fuel rack is fully over and there's a lot of smoke! 3kw is what I consider full realistic load at constant duty.
Done the maths. I assumed a frequency of 50hz, and gone with worst case assumptions so the resulting value will be oversized. I got 10,000µF.
I've got an old broken UPS at home with some big caps. I'll see if they're anything like the right rating - if they're OK I'll stick them in the post to you.
That makes sense for the power, I have not tried mine over 2.5 as that is the maximum GTI rating over a short period.
Thanks for the cap offer. I have a spare main bearing housing if you want one, as a swap for the cap, to replace your split one. I assume it is the same fitting as a normal one?
i may have some caps if you need them. away ATM will check when i get back.