When you say it's a non-turbo...is that just the way it's badged / supposed to be, or have you actually checked to see that there isn't a turbo lurking there?
I doubt even a mildly breathed-on 2.0 would manage those speeds without you being very much aware that it had been tinkered with. My 360 won't top 135mph, and it has 140bhp and a pair of snorting great carbs that make a racket!
What RPM is it doing at 150mph?
cheers
James
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