3.33:1 or 3.25:1 gears in a roadster?

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3.33:1 or 3.25:1 gears in a roadster?

Post by BuddyTheRoadster » Tue Nov 05, 2019 4:06 pm

Is anybody running 3.33 or 3.25 rear end gears in their car?

My 1923 roadster will be getting a Ruckstell within the next couple years, and I was thinking of installing taller rear axle gears than 3.63:1. The temporary motor has aluminum pistons, Waukesha head, cam with greater lift, and a high volume intake manifold. The eventual motor will have a Rajo F head and SCAT crank. If anyone's running a similar setup with 3.33:1 or 3.25:1 rear end gears, I'd love to hear your experiences with cruising speed, acceleration, and uphill torque.

Last edited by BuddyTheRoadster on Tue Nov 05, 2019 6:18 pm, edited 1 time in total.

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Re: 3.33:1 or 3.25:1 gears in a roadster?

Post by Ruxstel24 » Tue Nov 05, 2019 4:51 pm

I run a similar engine (less the cam), and 3:1 gears with a Ruckstel. I have no problems with my 24 touring pulling most hills around here in direct. I think (especially after the new engine),
You will be happy with the 3.25:1.
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Re: 3.33:1 or 3.25:1 gears in a roadster?

Post by Scott_Conger » Tue Nov 05, 2019 5:19 pm

I think either would be ideal with a Ruckstel and a peppy engine in a light car.
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Re: 3.33:1 or 3.25:1 gears in a roadster?

Post by Allan » Tue Nov 05, 2019 6:52 pm

Go for it! 3.25:1 works great in my roadster.

Allan from down under.

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