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9 Inch Diff For A R33 Can It Be Done

kris 44
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kris 44 Contributor

kris 44

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Guys you can get a ford 9 inch irs diff. And i will need 5.8 and 6.1 gears becouse i am runnig a bert gear box so i will be runnig in top gear not 2nd or 3rd it is alot cheaper in speedway to go bert gear box then buy a really good light fly wheel and clutch and then keep replaceing gear boxs as you blow them

Edited by kris 44
Duncan Grand Master

Duncan

Posted
Posted

one of the nissan vans runs an r200 with a high ratio (serena? espace?), there was a thread recently. It was about 4.9 I think.

Or maybe a custom pinion gear with the right ratio?

r200 is a very strong diff, and if you did actually have trouble with it (unlikely on dirt) there is always r220 out of 300zx that would fit.

Of course you can put a 9" in it, anything can be done with enough time and money, and sometimes it's worth it for reliability in a specific purpose.....not sure if there would be many IRS speedway cars out there?

fletch rb30 Enthusiast

fletch rb30

Posted
Posted

How much power? Have you considered a hq 3 speed box? top gear is 1:1, they are cheap, lots of guys at home put them on the back of 350chevs in saloons in nz.

We ran a 6.5 9inch then went to a 7!!! it was like a worm gear!

Plus you can get the 9 inch head with an alloy nose and carrier to save a bit of weight.

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