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Old 07-25-2015, 11:30 PM   #1
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hi everyone,
this is my first post. i'm david in colorado. Im a international student, and got chance to turbo my miata!!! it is a 1990 miata na6. i want to make it to have 250whp from 1.6 engine. with a gt2560r turbo and fm2 exhaust manifold. some ebay exhaust. i already rebuild my engine with forged piston and rod and cam. i got 3000 left to spend on differential, body kit, brake, and other stuff. im stuck how to choose a differential. i heared some swap to a 1.8 differential. but i dont know if the original differential case will fit, what ratio should i do (use for track and fun) and what else should i change.
ps. my english is suck,plz dont challenge me on english,LOL.
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Old 07-26-2015, 07:13 AM   #2
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A 1.8 differential will bolt in, but you will need the axles also. They are a different size.
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Old 07-26-2015, 03:10 PM   #3
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Welcome, davidlin121!
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Old 07-27-2015, 12:03 PM   #4
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how about drivenshaft, do i need change it too? and if i change the axles, do i need new hub
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Old 07-27-2015, 04:45 PM   #5
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Yes, you will need a new driveshaft form a 1.8 car. The hubs do not need to be changed.
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