Final Gear rations and seat of the pants feel. Options

[JBone]

I was just reading an article in SCC this past week about gear ratios (Technobabble, July 2005). In this article the author was discussing the effects of switching transmissions to different cars and their final drives.

This is where it's pretty cool. Transmissions and final drives ARE actually torque multipliers. Example: This article was about swapping a rare Autech SR20 DE (Nissan 2.0L DOHC) with a 6 speed tranny from a S15 Silvia into a Mazda Miata using the stock rear end with a 4.3:1 rear gear. He ranted into putting all the revs from the motor divided by each gear and then divided by the final drive. This number was multiplied by the circumference of the wheels being used. All this was to find wheel speed for each gear at every rev.

Next, he used dyno information to determine the torque at the wheels. The selection of the final drive alone can affect these numbers.

So, yes, this does indeed give you a higher amount of torque. And it will actually give you more all across the board because you altered the one gear that affects the output in every gear.