Dan Hull worked on a 10mm turbo, with HIS set-up, he had approx the same number as his triple.
But his triple did break the fastest speed land record(3,18 @ 108MPH). I don't have any news from his 10mm turbo scimitar. I think he ran 3,21, not sure 'bout it.
@lowriderb: Look in thread in PS you'll see some picture, it's all custom, I don't think its would be the same price as a 18mm Triple.