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I supported Toymods
Location:
I renounced punctuation
Registered:
May 2002
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Re: Rear Disk Brake Conversion - Hilux
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Sun, 15 June 2003 09:53
 
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Biggest Toyota disk with an internal drum handbrake is the ST205 GT4 Celica. The internal drum handbrake is 170 mm and the rotor diameter is 315 mm.
Many late Toyotas have 190 mm internal drum handbrakes, (MA70, MZ20, MX83, JZA80, xZ30 Soarer), and this coincidentally is the same as VT Commodores and Tickford Fords. The HSV stuff runs out to 345 mm (I think), and if you want you could go to a Harrop rear disc with custom cast bell to 375 mm. Expect a big bill if ordering anything in that league.
Mercedes also use internal drum handbrakes with a diameter of 165 mm. Their 500SL uses a 300 mm rear rotor.
As you can see from the article, I just used the MZ20 backing plates and had them slightly modified to fit. The internal drum handbrake mechanism fits perfectly. Not at all sure how that would work with a full floating rear end.
If you plan to use a tailshaft hadbrake, then you need not worry about the internal drum handbrake at all. Use whatever rotor you want and just make an adapter plate suit.
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