Comments on: Determining rear axle ratio http://gastiresoil.blogsome.com/2007/03/19/determining-rear-axle-ratio/ If you didn't build it, you don't own it. The making from scratch or customization of everything. Fri, 01 Jan 2010 20:43:30 +0000 http://wordpress.org/?v=1.5.1-alpha by: DaVe http://gastiresoil.blogsome.com/2007/03/19/determining-rear-axle-ratio/#comment-246 Fri, 14 Sep 2007 00:27:33 +0100 http://gastiresoil.blogsome.com/2007/03/19/determining-rear-axle-ratio/#comment-246 Here's the right way to do this: Jack one of your rear tires off the road. Turn that tire one full turn and see how many times your driveshaft turns. That's your rearend gear ratio. Here’s the right way to do this:

Jack one of your rear tires off the road.
Turn that tire one full turn and see how many times your driveshaft turns.

That’s your rearend gear ratio.

]]> by: Huckleberry http://gastiresoil.blogsome.com/2007/03/19/determining-rear-axle-ratio/#comment-237 Tue, 17 Jul 2007 16:36:05 +0100 http://gastiresoil.blogsome.com/2007/03/19/determining-rear-axle-ratio/#comment-237 What are you looking at in that tempest, a straight 6 or v-8? With a 2.56 gear ratio (and remember, tire/rim size affects this as well) if you build an engine with a shallower power curve, you could get really great mileage. I had a 71 Chevelle with a 2.73 rear gear ratio, threw on a 2500 rpm stall converter, a cam with decent lobe separation and a set of heads with 74cc compression chambers. With a Carter AFB and a stealth intake, I got 26 MPG from a 4000 lb car with a v-8. What are you looking at in that tempest, a straight 6 or v-8?
With a 2.56 gear ratio (and remember, tire/rim size affects this as well) if you build an engine with a shallower power curve, you could get really great mileage. I had a 71 Chevelle with a 2.73 rear gear ratio, threw on a 2500 rpm stall converter, a cam with decent lobe separation and a set of heads with 74cc compression chambers.
With a Carter AFB and a stealth intake, I got 26 MPG from a 4000 lb car with a v-8.

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