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The mkiv Supra Owners Club

Dual brake master cylinder set up


Chris Wilson

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Dunno if anyone is interested, I was going to buy a master cylinder kit off a firm in the US for my FD3S, but being in the UK the hassles of having stuff shipped from the US and potential duty and tax made me decide to make my own.

 

It is now installed, I have pics on my web site:

 

http://www.formula3.freeserve.co.uk/cylinders/MVC-580F.JPG

 

http://www.formula3.freeserve.co.uk/cylinders/MVC-581F.JPG

 

http://www.formula3.freeserve.co.uk/cylinders/MVC-582F.JPG

 

http://www.formula3.freeserve.co.uk/cylinders/MVC-583F.JPG

 

http://www.formula3.freeserve.co.uk/cylinders/MVC-584F.JPG

 

I will be adding in car bias adjustment via cable and knob next.

 

I could do a similar set up for the MKIV, but it would be costly, expect

about 450 quid for fabricating what you see in the pics. You really need to run this none servo set up with bigger brakes to keep a low pedal travel with sensible effort. Road cars run servos because, basically, their brakes are too small.

 

The set up runs with 14 inch front AP discs and AP lightweight

race 6 pot calipers, and rear 13 inch AP discs with AP lightweight

4 pot calipers. I have also sourced a complete set of uniball joints

to replace all the rubber bushes remaining in the FD suspension from Japan, and it fits perfectly and seems excellent quality. The stock NONE rubber sleeved uniballs remain, but all rubber isolated, or rubber only ones are replaced with steel mounted uniball bushings. The car is for track usage, yet will remain (just) road legal. Maybe someone with these Jap MKIV mags could see if a similar uniball replacement bushing kit exists? RX-7 FD3S owners are lucky as the car comes as stock with a third of the suspension rose (uniball) jointed as stock. Hope it's of interest, people often e-mail asking what can be done that's a bit unique..

 

Any personal replies to [email protected] please,

my web access is limited. Thanks

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I thought AP were now offereing a dual brake system?? Something to do with making sure its got longer too cool down...hmmm maybe it was a dual resevior system thinking about it. It was in an advert in the last Racecar Engineer (BMW V8 Racer on the front).....

 

Would a dual resevior system help those of us who track day our MKIV's?

 

How can I get the brake fluid to cool down faster?

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