Another gear ratio question - Steve Saunders Goldwing Forums

 
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post #1 of 10 (permalink) Old 01-20-2007, 07:07 PM Thread Starter
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Is a rear end ratio of 411 "lower" than 383?
That is, say in first gear, does 411 give you more axle twisting torque and turn the engine faster at a given road speed than 383?

1983 GL1100 Interstate with 1200 engine, single carb, and C5 ignition.



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post #2 of 10 (permalink) Old 01-20-2007, 07:11 PM
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You are right with the first guess.
4:11 means the crankshaft makes 4.11 revolutions to 1 revolution of the rear (driven) wheel.

Therefore, it would provide more torque than the 3.83 ratio because the engine is turning slower for the same rear wheel speed.

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post #3 of 10 (permalink) Old 01-20-2007, 07:48 PM Thread Starter
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Thanks AZ

1983 GL1100 Interstate with 1200 engine, single carb, and C5 ignition.



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post #4 of 10 (permalink) Old 01-20-2007, 07:51 PM
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post #5 of 10 (permalink) Old 10-02-2011, 09:00 PM
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Good question and some good answers. Now I have a question. I have a Goldwing Trike 1800, 2005,with a Chamption kit. I'm sure I have a Toyota rear end, but I want a higher gear ratio. What model has got a higher ratio rear end?
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post #6 of 10 (permalink) Old 10-02-2011, 10:21 PM
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icu2 wrote:
Quote:
Good question and some good answers. Now I have a question. I have a Goldwing Trike 1800, 2005,with a Chamption kit. I'm sure I have a Toyota rear end, but I want a higher gear ratio. What model has got a higher ratio rear end?
Your best bet might be to take it to a Toyota dealership and see if they can identify it. If so, there may be other ratios available by changing the gears inside your housing. For example, my '64 Impala had 5 different ratios available from 3.08 to 4.56 depending on engine size, type of carburetion, and whether the trans was auto or manual shift.

You may find the same to be true with yours.

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post #7 of 10 (permalink) Old 10-02-2011, 10:26 PM
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icu2 wrote:
Quote:
Good question and some good answers. Now I have a question. I have a Goldwing Trike 1800, 2005,with a Chamption kit. I'm sure I have a Toyota rear end, but I want a higher gear ratio. What model has got a higher ratio rear end?
There should be a tag, usually on the differential cover that will give the ring gear size and axle ratio. This for US built cars for sure.

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post #8 of 10 (permalink) Old 10-02-2011, 10:38 PM
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Hey icu2
What do you mean by higher ratio. Are you looking to raise or drop the engine speed at a given roadspeed. When talking axle ratio's a higher ratio usually means more engine rpm and more power touqe. A lower ratio numericaly gives more speed and less power much like an OD would
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post #9 of 10 (permalink) Old 10-03-2011, 06:11 AM
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Larger number = lower gear ratio = higher RPM



as an example I just was researching this to buy tires for my sons truck .



ratio 4.11:1 , 35" tire [email protected] 55MPH = 1520 ( in overdrive )

ratio 3.42:1 , 35" tire [email protected] 55MPH = 1265 ( in overdrive )

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post #10 of 10 (permalink) Old 10-03-2011, 10:39 PM
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Ok, a lower ratio. I knew I was going to get that wrong!! I'm wanting to lower my RPM, just a little without causeing a strain on the 1800. Right now, at 70 MPH I'm turning about 3,000 RPM. I want to drop about 500 RPM. If I drop 1,000 RPMs, it'll be too much. I have high loop torq pipes, true duel exhaust, let's say, better muffers, so I'm not lacking for power or torq by doing this. Speed is not the purpose for doing this. We put between 40,000 and 50,000 miles a year on the 1800. I just want a little better mileage and I know the Wing is fully capable of this change, or at least I believe it is.
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