MFactory upgraded gearsets
#128
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https://www.miataturbo.net/suspensio...2/#post1395080
The first thread ("Gearbox options/experience") is an absolute must-read for you, MFactory, and anyone else at Jack's working on this project. It's the best and most recent synposis of our current options, the issues with those options, the various requirements for each specific application (street vs. autocross vs. road race), and lots more. I can't easily impart all of the information unto you more quickly or easily than to tell you that you absolutely must read that thread front to back.
If you are going to do only a 3-4-5 you are basically locked into OE ratios. Any tweaks will leave an odd gap between 2nd and 3rd that would not be desirable for a substantial number of customers (street cars). If you can do all 6 or at least 1-5, find posts by me or Emilio on gear ratios. 2.8/2.0/1.5/1.25/1/.85 puts you in the ballpark but we have both gone in depth on why
#138
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Got mine today. 43/13, or 3.30769:1. Unicorn gears forever, now they come in 2 days air-freight from Taiwan. Super cool.
For big, take the image URL and delete the "l" right before the file suffix.
These will replace the 3.63s in Acamas.
![Name: QqnZee5l.jpg
Views: 172
Size: 35.1 KB](https://www.miataturbo.net/attachments/suspension-brakes-drivetrain-49/230426d1683052337-mfactory-upgraded-gearsets-qqnzee5l.jpg)
![Name: gSqol6xl.jpg
Views: 172
Size: 37.0 KB](https://www.miataturbo.net/attachments/suspension-brakes-drivetrain-49/230427d1683052337-mfactory-upgraded-gearsets-gsqol6xl.jpg)
For big, take the image URL and delete the "l" right before the file suffix.
These will replace the 3.63s in Acamas.
![Name: QqnZee5l.jpg
Views: 172
Size: 35.1 KB](https://www.miataturbo.net/attachments/suspension-brakes-drivetrain-49/230426d1683052337-mfactory-upgraded-gearsets-qqnzee5l.jpg)
![Name: gSqol6xl.jpg
Views: 172
Size: 37.0 KB](https://www.miataturbo.net/attachments/suspension-brakes-drivetrain-49/230427d1683052337-mfactory-upgraded-gearsets-gsqol6xl.jpg)
![Name: RftjI4el.jpg
Views: 170
Size: 35.4 KB](https://www.miataturbo.net/attachments/suspension-brakes-drivetrain-49/230428d1683052337-mfactory-upgraded-gearsets-rftji4el.jpg)
#139
mkturbo.com
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I also wonder if these came from one of the factories that MiataRoadster tried to get to make them. I believe Bill said he tried a few shops in Taiwan, but none could get the QC that he wanted.