We do not do gearbox gear reduction but if you are installing gear reduction you only need to do the math- Our tuning charts describe how you can tune your clutches to the tire size your car "THINKS" it has.
Look up a tire circumference calculator..... 32" tire is a 100" circumference and is what our tuning charts are based on. If your running 35" tires they have a 110" circumference so they're 10% larger than the 32". If you gear reduce the transmission 10% then the car "THINKS" it still has 32" tires on it still and you will reference the standard clutch kit tuning on our chart as the chart is based off 32" tires. Math in school paid off here in real life, pretty solid.
See below
| For sand dunes or large tires (35"+)- subtract 8% from the Published HP range of your tune to get actual effective HP. Example - 200 CHP x .92 = 184CHP (use the 175CHP line in the chart below as your baseline setting) |
| For tires 28" and smaller-Add 8% from the Published HP range of your tune to get actual effective HP. Example - 200 CHP x .1.08 = 216CHP (use the 215CHP line in the chart below as your baseline setting) |
See the tuning charts here- AO-P1 Tuing Chart