# Torque at Start

**URL:** <https://community.electricforum.com/t/torque-at-start/4458>\
**Category:** Conversion Kits\
**Created:** [September 21, 2014, 5:33pm UTC](https://community.electricforum.com/t/torque-at-start/4458 "2014-09-21T17:33:09Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![stanjo58](https://avatars.discourse-cdn.com/v4/letter/s/c2a13f/32.png) [@stanjo58](https://community.electricforum.com/u/stanjo58)\
**Post date:** [September 21, 2014, 5:33pm UTC](https://community.electricforum.com/t/torque-at-start/4458/1 "2014-09-21T17:33:09Z")

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Hello all, total newbie here.

I am converting a Triumph Spitfire and considering Direct Drive connecting to the differential. I am having incredible trouble determining the amount of Motor torque necessary to move the car from a dead stop.  
Calculus is long in the rear view mirror. However it seems there should be a way to calculate the necessary torque given a 1800lb vehicle, a wheel radius of 11.6" and a differential ratio of 3.89/1.

Can anyone help me out here?