drive ratios vs boost charts weiand 142 144 drive ratio/estimated boost ... 5.9 4.5 1.71:1 71 4.3 3.0 1.60:1 60 3.1 weiand 174 177 drive ratio/estimated boost ... 4.2 3.4 1.50:1 50 4.7 3.0 1.41:1 41 3.5 weiand 250 256 drive ratio/estimated boost ... .3 7.9 6.3 1.63:1 63 10.3 8.8 6.6 5.1 1.53:1 53 8.8 7.4 5.3 3.9 weiand 6-71 drive ... 5.4 5.0 0.70:1 -30 7.8 6.3 4.5 4.1 3.7 weiand 8-71 drive ratio/estimated boost chart ... 7 0.70:1 -30 9.2 7.6 5.7 4.8 3.6 78 www.weiand.com ...
top pulley tooth count 52 7109-52 53 7109-53 54 7109-54 55 7109-55 57 7109- ... -59 0 50 7109-50 7109-51 7109-52 7109-53 7109-54 7109-55 7109-57 7109-59 7109-61 ... 3 drive bottom pulley tooth count 51 52 53 54 55 57 59 61 63 1.04:1 1.02:1 4 2 1. ... indicate underdrive ratios 116 www.weiand.com ...
