S2000 Under The Hood S2000 Technical and Mechanical discussions.

Definition of steering ratio?

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Old Dec 12, 2002 | 12:06 PM
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Default Definition of steering ratio?

or whatever the actual term is..

I know it is 2.5 for S2000.... which is consider quick... but just wondering
how do they test/define this?
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Old Dec 12, 2002 | 12:38 PM
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[QUOTE]Originally posted by JT-KGY
[B]or whatever the actual term is..
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Old Dec 12, 2002 | 12:42 PM
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The info I have is that the S2000's "Steering Ratio" is 13.9:1. I don't know what that represents; anyone?

I think your 2.5 number is the "Steering Wheel Turns, Lock-to-Lock" (actually 2.4 for the S2000). That's more self-explanatory, i.e., the number of revolutions of the steering wheel from fully left to fully right. And yes, that number is fairly low, which makes the S2000 steering comparitively quick.

Ted
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Old Dec 12, 2002 | 12:45 PM
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[QUOTE]Originally posted by xviper
[B]
I'm not an expert on this topic but I don't think 2.5 represents the steering ratio.
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Old Dec 12, 2002 | 12:51 PM
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My RSX was the same steering turns (lock to lock), as the S2000 (or approximately)... but the RSX turned so horrible. It took a much larger radius to do a full circle, compared to the S2000.
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Old Dec 12, 2002 | 01:27 PM
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Originally posted by koala
My RSX was the same steering turns (lock to lock), as the S2000 (or approximately)... but the RSX turned so horrible. It took a much larger radius to do a full circle, compared to the S2000.
that's fairly typical of front wheel drive....
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Old Dec 12, 2002 | 02:07 PM
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The steering ratio is simply the reationship between the angle you make with the steering wheel vs the angle that the front wheels (er, the steering wheels ) make. So if your ratio is 13.9:1 (like the S2000), then for every 13.9 degrees you move the steering wheel in your hands the front wheels will turn 1 degree.

So of course from there you can say that because the S2000 makes 2.4 turns of the streering wheel lock-to-lock, then that gets you a total of 864 degrees of streeing wheel travel... or 62.1 degrees of total front wheel travel.

And there you go.

cheers,
jason keeney
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Old Dec 12, 2002 | 03:32 PM
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Jason,

I did not know that.

Thanks,

Ted
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Old Dec 13, 2002 | 04:41 PM
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... and then there's the Type V which has a speed variable steering ratio...
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Old Dec 14, 2002 | 06:27 AM
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The RATIO is the same as the ratio in the transmission or differential - it's the number of teeth on the input vs. the number of teeth on the output. The lower the number, the quicker it turns and the harder it is to turn. The S's 13.x:1 ratio leads to the ~2.5 turns lock-to-lock vs. the more typical (with power steering) ~15:1 with 3+ turns lock-to-lock. Solid parts get in the way of ultimate turning so it's not a completely apples-to-apples comparison...
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