I have some various editions of Motor and Wheels magazines, and not all of them have this figure for the jazz, there are definately some figures saying jazz's only do 17's.

I've seen a lot of vagueness in the quarter mile times in the summary sections of these mags. Which is where i'm guessing colundra was looking. The numbers found there are just guides as they are done under a wide range of conditions, fuel load, temperature and degrees of uphill/downhill. They can't take every car to the dragstrip to test it.

Wheels article i posted is a more reliable source than these summary sections as it was done under proper testing conditions at the track.