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3rd Generation RX-7 Installation photos

On June 6, 2004, Zeckhausen Racing installed a custom StopTech front brake kit on a 1993 RX-7 track car.  The kit used 4-piston ST-40 calipers and floating 332mm x 32mm AeroRotors.

Custom StopTech front kit with 34/36mm caliper pistons

Custom caliper piston sizing of 34/36mm was used, instead of the standard 30/36mm sizing, because this race car has larger rear brakes transplanted from the 1999 Japanese model RX-7.  In order to provide proper front/rear brake balance, larger pistons were required in the StopTech calipers.

Upgraded rear brakes - 1999 RX-7 (Japanese Model)

The components required to upgrade to the larger 1999 Japanese RX-7 brakes are available from Mazda Competition for approximately $750 if you are a member.  See their website for membership and ordering details.

If you have upgraded your rear brakes and wish to install StopTech front brakes, you should order StopTech p/n 87-546-4600.  The standard StopTech front brake kit (p/n 83-546-4600) is sized to work with the smaller 1993-1995 rear brakes.  The "87" in the first two digits of the part number specifies "race only" since the kit uses anti-knockback springs behind the caliper pistons.  This kit may be driven on the street, but there may be some slight brake drag induced by the springs.  If there is a long period between track events, you may wish to pull the caliper pistons and remove the springs for street use, then reinstall them before the track event.  All StopTech kits with parts numbers starting with "87" are sold without brake pads.  If you wish to use these brakes on the street, you will need to order street pads (typically Axxis Ultimate) in addition to race pads.

Custom backing plate and brake cooling ducts

This RX-7 had custom backing plates, with a flexible duct routed from the front of the car, to force cool air through the rotors.  The StopTech kit bolted right on with no interference.

Important note: The StopTech kit uses the factory caliper mounting bolts to hold the adapter bracket in place.  If your RX-7 has a custom brake kit installed already that uses DIFFERENT hardware to hold the calipers in place, you will need to either find the original caliper bolts in that box at the back of your garage, or you will need to purchase new bolts from your Mazda parts source.  The RX-7 pictured above had larger diameter Coleman rotors and an adapter plate which relocated the stock calipers in order to fit the bigger rotors.  This arrangement did not use the factory caliper bolts, so new ones had to be located before we could begin the installation.

Pads and StopTech stiffening bridge installed

Bleeding the brakes was a snap.  Unlike the Nissan 350Z, which requires the calipers to be tilted forward for the initial bleed, the RX-7 kit positions the calipers completely vertical so the bleed screws are at the top and air bubbles easily migrate out.  Still, I followed all the best practices documented on my brake bleeding page.  Tapping the calipers with a rubber mallet only yielded a couple of tiny bubbles, but it's better to have them in the catch bottle than in the caliper!

 

To order by phone or for technical assistance:

Call (800)222-8893 and press "1" for Sales

International customers may call: 973-761-5054

Hours of operation: Monday-Friday, 10AM - 5PM  (Eastern Time)

We are located in Fairfield, New Jersey

 

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Copyright 2014 Zeckhausen Racing, LLC
Last modified: 4/4/2014