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240Z rear disk brake conversion


crayZlair

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Back about 9 years ago, I purchased a conversion kit from somewhere that I can't recall. It uses 240SX calipers and an 11.25" diameter cross-drilled rotor.
Anyway, one of the calipers is leaking, and I would like to upgrade to a caliper that is lighter and has more piston area (think Willwood). What I would like to avoid is replacing the mounting brackets as that will entail cutting the existing bracket in half, or pulling the stub axles. I can't find a Willwood caliper with the required mounting center of 4.5", so I will probably have to make an adapter for the existing bracket. Any other suggestions?

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I am currently upgrading my race car to Mustang S197 rotors and calipers.  They aren't as light as Wilwood, but the piston is a 43mm and the rotor is 300mm vented.  Most 15" wheels will just clear the caliper.  Silvermine sells the adapter brackets.

Have you checked your axles bearings for wear?  Did you replace them once already?  If not, now is a good time to bite the bullet and pull the stub axles.  I just did one side of mine last might and the job wasn't bad.  Cutting the peened areas of the axle nut was the hardest part.  I removed the drum and halfshaft, cut the nut, pulled the stub axle and pulled the spindle pin.  The job took about 3 hours and much of that was fighting the adjusted on the drum so I could slide it off.

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2 hours ago, Jeff G 78 said:

 

Have you checked your axles bearings for wear?  Did you replace them once already? 

Yes, I replaced the bearings when I did the conversion. The car has only "been driven on Sundays" since then. 10 - 12 autocross events per season. ?

Thank you for your input!

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