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Martyn777
#1 Posted : 14 March 2019 10:08:17(UTC)
Martyn777

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Any recommendations?

 

2 way or 3 way ?

 

Compared to stock, on a track, what would it do? Make the front end sharper on turn in? Looser at the back?

NickD
#2 Posted : 14 March 2019 11:53:16(UTC)
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The main benefit is it will make you feel happy. 

Martyn777
#3 Posted : 14 March 2019 16:31:44(UTC)
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True!

 

Am I to interpret that as no handling benefits at all?

 

saz9961
#4 Posted : 14 March 2019 16:52:05(UTC)
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Triangulated braces in my view are worth while. A brace with a brake stopper is certainly worthwhile.
Martyn777
#5 Posted : 14 March 2019 19:54:03(UTC)
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What’s a brake stopper, sorry!

 

rodders
#6 Posted : 14 March 2019 19:59:44(UTC)
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I did a blind test on a mk3 where I didn't know if a brace was fitted or removed......this was on a test day.

lets just say if anyone wants flyin miata strur & under body braces I have some.....going cheap

Martyn777
#7 Posted : 14 March 2019 20:41:18(UTC)
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Interesting!

 

Didn't know they were a waste of time, thought it would have tightened things up?

I guess the BRSCC MX5 race series cars don't have them...

saz9961
#8 Posted : 14 March 2019 21:42:49(UTC)
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What goes for the NC doesn't really apply to the NA/NB.

The mantra is that NA/NB MX5s don't have struts. Strut braces worked on Escorts as these use Macpherson struts, where alignment was changed under hard cornering.

On the NA/NB, the "strut brace", or shock tower brace (STBs), serves to additionally stiffen a floppy shell. Front subframe braces, like the rear, stop the subframes from distorting under cornering, so these are definitely worth having. There are STBs and there are STBs. The OE Mazda STB is a pretty solid bit of kit, and you can nicely load it up. The cheap braces are.... Well they use a lot of bolt together light weight materials, and likely don't do a lot.

I have an alloy one-piece RS Aizawa brace; it ties together the inner wings to the firewall. But for me the biggest benefit is the brake stopper. A brake stopper braces the brace master cylinder from movement. Pump the brake hard back and forth, and you will see the master cylinder move, as the firewall flexes. That's lost energy from braking. Some will change the brake hoses for Goodrich hoses; essentially rubber brake hoses wrapped in a metal sheath, to stop the rubber bulging under hard braking. The result is with Goodrich hosing firmer brakes. I don't like changing these components to non-OE; there are a lot of substandard parts out there, and failure results in loss of braking. A brake booster can have a similar effect; a firmer brake pedal, but there is no change to the braking components.


You can get stand alone brake stoppers, but many are built into the bracket of a TB; literally a bolt that can be loaded against the nose of the master cylinder.

Homebrew efforts can be made, but I've seen some cheap STB brackets bend under the load.

 

https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcS8bQ_7cyMSgcXwsnpxJ2DI323KWqSils4bpzuyEC2Xeqat7NcN4g

Edited by user 14 March 2019 21:45:24(UTC)  | Reason: Not specified

NickD
#9 Posted : 15 March 2019 08:52:08(UTC)
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Martin,

Mazda fitted thew to some cars for NHV reasons as they lower certain frequencies and stop some vibrations. If they made any handling impact they would be fitted to all the cars as standard. The main benefits are cosmetic. 

Understand that you have an open top car and both longitudinal and torsional stiffness rely on just the transmission tunnel and sills, which may or may not be full of holes. A strut brace does not cure this. Race cars have the benefit of a substantial cage effectively creating the stiffness of a roof and then some.

As the dampers do not form part of the suspension alignment control in the MX-5, any benefit from these devices would be very heavily stacked toward placebo and I have never seen anyone claim a faster lap time because of one. 

On the MK2's they were 3 piece devices with the top brace being held to the main brackets with what was effectively self tapping screws into slotted holes through thin sheet metal. They were never designed to resist any substantive loads. 

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