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Parts Spotlight: Miata Differential Brace

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#1
Johnny D

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DiffBraces1-400x244.jpg

 

Two-piece brace protects the differential housing in the event of contact

Part No: 0000-02-5160-MC
Racer Price: $35.00

On 1.8-liter NA and NB Miatas the OEM differential housing has a notch on the passenger-side arm that is designed to help the unit absorb energy in the case of an accident. Mazda engineers designed the housing in such a way that the differential would separate first during a major street accident, absorbing energy and protecting larger components from damage. This is a great idea for a road car, but in a race car – especially a Spec Miata where close racing is the norm – that design element can become problematic, turning what would otherwise be inconsequential contact into the end of a race.

 

DiffBraces3-400x244.jpg

 

Fortunately, as of the February 2018 edition of SCCA’s General Competition Rules, it is now possible to strengthen that arm and eliminate the engineered energy absorption point. Mazda Motorsports offers laser-cut plates that are designed to fit onto the differential housing of first- and second-generation 1.8-liter Miatas. Welded onto the differential housing in the proper positions, they effectively eliminate the designed separation point. Cut to fit perfectly – even accommodating the pin on the back of the differential arm (and using it for proper placement) – securing the 3/16-inch aluminum plates require no other modification to the differential housing.

 

The differential braces are now available from Mazda Motorsports. Log on to order or call (800) 435-2508.

 

DiffBraces2.jpg


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#2
Ron Alan

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Is this part stamped like the sub-frame pieces? Are we not allowed to cut our own aluminum plate and do this? 


Ron

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#3
Jim Drago

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Is this part stamped like the sub-frame pieces? Are we not allowed to cut our own aluminum plate and do this? 

We are and quite frankly and while I am biased, I like mine much better :)  the problem is not the buying the piece, it is most can't or dont have a tig

 

http://mazdaracers.c...ential-housing/

Jim


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#4
Marc Cefalo

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We are and quite frankly and while I am biased, I like mine much better :)  the problem is not the buying the piece, it is most can't or dont have a tig

 

http://mazdaracers.c...ential-housing/

Jim

agreed, whats offered is not enough as early versions that we braced just on one side could still be broken.  the right way is both front and rear along with both sides of the carrier.....if it breaks after that....well the owner has much more to worry about as the chassis has GOT to be written off.


Marc Cefalo

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