As the air is under pressure its going to make use of all the cross sectional area of the port, the head is oval where it meets the inlet isn't it? If it is, then sticking a round inlet on it wont do you any favours, you might as well get the demel out and spend 10 min matching it.
''so i've heard'' doesn't deserve ''accurate'' - i didn't suggest for one minute it was gospel.
Perhaps i could have said 7.5k, (thus implying accuracy to 500rpm) but i didn't, i quoted what i had heard. IMO you cant change what you hear, then quote it, there's no point in doing that at all.
What rpm would you say the mk1 is safe to run at for unsustained periods of time?
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Justin - you cant store it at my house i'm afraid, my folkes wouldn't even entertain the idea! Sorry
Tom