S2000 Under The Hood S2000 Technical and Mechanical discussions.

4.77 gears vs. stock 4.10 gears

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Old Feb 13, 2010 | 08:36 PM
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Default 4.77 gears vs. stock 4.10 gears

I have read that the 4.44 gears put the car about 300 RPM over the stock gears while driving. How many RPMs are you guys running at 55mph in 6th gear with the 4.77?
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Old Feb 13, 2010 | 08:52 PM
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With 4.77's you're about 700 RPM higher than the stock 4.10's.
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Old Feb 14, 2010 | 04:54 AM
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knock yourself out...


gear calc
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Old Feb 14, 2010 | 08:39 PM
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Thanks.
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Old Feb 15, 2010 | 12:03 AM
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If I can kinda of thread jack here, what kind of mpg loss are you guys seeing after the change over to 4.77 from stock?
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Old Feb 15, 2010 | 06:44 AM
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i didn't get good mpg prior with 4.10s, i think maybe 20-22mpg, too much wot as i do stoplight driving with rare/brief highway use, but, the 4.77s fun factor is worth the extra gallon per week...
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Old Feb 15, 2010 | 02:04 PM
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Originally Posted by essi1553,Feb 15 2010, 01:03 AM
If I can kinda of thread jack here, what kind of mpg loss are you guys seeing after the change over to 4.77 from stock?
I get around 250 miles per tank with the 4.77's. That's a little bit of everything. VTEC daily, city/highway mileage.
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Old Feb 18, 2010 | 12:00 PM
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Hmm, s2k aok I take it you are now supercharged, are you still running 4.77 gears or is it way too short for the FI??

My actual plan was to supercharge much later down the line but I wouldn't also mind shorter gears, I just get worried because I tend to do alot of highway miles and I don't want to kill my mpg too much..

Would maybe 4.56 be ideal? considering supercharging later..
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Old Feb 18, 2010 | 12:04 PM
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I dont even know where to buy these gears from
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Old Feb 18, 2010 | 12:29 PM
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Originally Posted by Angerman,Feb 18 2010, 01:04 PM
I dont even know where to buy these gears from
There a sponser on here that sells them I think he's called hardtopguy (www.hardtopguy.com)

He also sells kits to build your up yourself, I think the gear itself is kia 4.77's.
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