I run the Novak 5.5L on a 21/84 on the atomized B44 which is 10:1
Gear ratio charts below
or click ->
http://atomic-carbon.gforceimages.net/su.html
S4 Gear ratios
Pinion
78t
81t
84t
15
13.00
13.50
14.00
16
12.19
12.66
13.12
17
11.47
11.91
12.35
18
10.83
11.25
11.67
19
10.26
10.66
11.05
20
9.75
10.13
10.50
21
9.29
9.64
10.00
22
8.86
9.20
9.54
Atomized B44 Gear ratios
Pinion
84t
15
14.00
16
13.12
17
12.35
18
11.67
19
11.05
20
10.50
21
10.00
22
9.54