Hi Dave
I don't think that a 19turn spec would be allowed as it's rebuildable and not 'sealed can'
You can run it in 2wd Mod and I bet that with the amount of slippy floor we seemed to have then it wouldn't be far off the pace as you just can't get the power down.
20T Saturns are only a tenner at most and the cars aren't to slow when combined with a 60c lipo and the perfect gear ratio
The best thing to do is come and have a go, I bet there were 70 - 80 drivers
there on Saturday.
Hope this helps
Brett