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Old 12-04-2006, 01:02 AM   #1
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Default Rear end gears?

Has anyone heard of changing rear end gears? (correct me if I'm wrong) but in 1.6 Miata's the gear ratio is 4:30. Does anyone know about 5:30 gears? I thought I saw them in a SCCA mag but I can't find it anymore. I think IRS makes some but I don't know how to get ahold of them.
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Old 12-04-2006, 01:10 AM   #2
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Do you plan to install a turbo, if so, I would think that you would want lower gears, when you have the power, you really do not have to worry about torque multiplication. Also, if this is going to be a DD, those gears will drive you nuts. I would aim to get a 1.8 dif and try and get the 3.9 gears. That is my plan, it will drop the revs down on the freeway, and make the gears last a little longer. That is what I want in my DD turbo car, Maybe it is just me.
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Old 12-04-2006, 01:17 AM   #3
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That was the plan at first. But I had to sell my kit. And I was just looking for a little more get up for drivin around and maybe a little local SCCA action. There are no freeways where I live. The fastest posted speed limit around here is 50. plus it 's not gonna be a daily driver anymore.
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Old 12-04-2006, 01:20 AM   #4
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mazda comp sells 4.78 ring and pinion kit for $315
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Old 12-04-2006, 01:22 AM   #5
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link?
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Old 12-04-2006, 01:35 AM   #6
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need a membership to buy from mazdaspeed.

0662-27-950A C RING AND PINION - 4.875 1 MIATA 1.6 DOHC 1990-93 $315.80

Notes: 4.785 ratio. Required special shimming to fit.
0662-27-950A-AW C RING AND PINION, 4.8 - DEBURRED AND COATED 1 MIATA 1.6 1990-93 $477.95

Notes: Competition 4.8 ring and pinion for Miata (0662-27-950A) goes one step further and is deburred and specially coated to improve strength and reliability. Reduces friction and operating temperature. Requires doubling of shims (over stock setup) to fit in stock case.)


http://www.mazdamotorsports.com
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Old 12-04-2006, 01:37 AM   #7
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Your the man, thanks.
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Old 12-04-2006, 01:55 AM   #8
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man...thats a lot of work just to buy some parts.
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