what pinion in the B44 with 7.5 Speed Passion?

[muratti]

According to the previous Threads regarding similar topics would it be ok to have a 24 pinion on a 84 Spur in the b44 with a Speed Passion 7.5t motor? I race on a small dirt track. Or should i got down? 22 maybe? The Speed Passion Guide says something different to what i have here: http://www.comeseethis.com/gearing/Default.aspx I took the LRP motor as they have no Speed Passion here... Any help would be appreciated.