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Geo. H · 11-22-2012, 01:06 AM

I have two A's. A 30 coupe with 3.78 and stock motor, and a 31 roadster with 3.54 and a warmed up B motor. The roadster will climb faster but only if I use second gear and overdrive. The coupe will climb hills in high gear that the roadster won't climb unless I use second and over. It's a matter of torque. All the hop-ups you describe will increase horsepower, but only at a higher rpm. Torque is what you need to climb hills, and torque may even be reduced by the hop-ups at a given rpm. All that increased horsepower will only come into play at high rpm. Leave the rear end gearing alone if you want to climb hills in high gear.

11-22-2012, 01:06 AM	#15
Geo. H Senior Member Join Date: May 2010 Posts: 374	Re: HP/torque vs rear end ratio I have two A's. A 30 coupe with 3.78 and stock motor, and a 31 roadster with 3.54 and a warmed up B motor. The roadster will climb faster but only if I use second gear and overdrive. The coupe will climb hills in high gear that the roadster won't climb unless I use second and over. It's a matter of torque. All the hop-ups you describe will increase horsepower, but only at a higher rpm. Torque is what you need to climb hills, and torque may even be reduced by the hop-ups at a given rpm. All that increased horsepower will only come into play at high rpm. Leave the rear end gearing alone if you want to climb hills in high gear.