Motor Trend: 2016 Miata vs 2015 BRZ

[glamcem]

Originally Posted by OkieSnuffBox

No it's not, you may pass the broom stick test, but see if NASA/SCCA will approve it for HPDE/TT.

That's why the only "proper" roll-bar (for the NC) is this crazy monstrosity from Flyin' Miata. https://www.flyinmiata.com/nc-transformer-roll-bar.html

The other types sold (like what you have pictured) don't have proper support for the hoops.

yes, that's what I was trying to say; single hoop is required for some organizations and some even requires you a forward brace in addition to the single hoop


I don't recall the rules since I never attended any NASA event with a convertible (only with the BRZ) but most TT cars had full cage vs HPDE cars which makes sense

[glamcem]

Originally Posted by Lord09

So in the event of a being rear ended or some other frontal collision, you don't see any safety issue with your head possibly snapping back and hitting the taller aftermarket roll bar? Stock ones are fine since they're so low, it's a non issue.

I'm all for roll bars, but unless you're on the track with a helmet, I wouldn't drive the car without some type of padding on the bar.

I don't see why it would be an issue with higher hoops, keep in mind some BMWs and Audi came with higher roll bars from factory .. I would never consider driving any convertible car with an adequate rollover protection each his own of course

[JS + BRZ]

Damn, that all new TT looks horrible.

[OkieSnuffBox]

Originally Posted by glamcem

yes, that's what I was trying to say; single hoop is required for some organizations and some even requires you a forward brace in addition to the single hoop


I don't recall the rules since I never attended any NASA event with a convertible (only with the BRZ) but most TT cars had full cage vs HPDE cars which makes sense

Yep, and from what I understand Good-Win doesn't even offer that setup anymore.

Lack of decent roll bar setup is part of the reason I ditched my NC and got the BRZ..........

[glamcem]

Originally Posted by OkieSnuffBox

Yep, and from what I understand Good-Win doesn't even offer that setup anymore.

Lack of decent roll bar setup is part of the reason I ditched my NC and got the BRZ..........

I hear you .. to be honest, I initially didn't really care for the rollover protection as much but after seeing a few crash videos they completely changed my mind

[Entroper]

Originally Posted by glamcem

yes, that's what I was trying to say; single hoop is required for some organizations and some even requires you a forward brace in addition to the single hoop

I don't recall the rules since I never attended any NASA event with a convertible (only with the BRZ) but most TT cars had full cage vs HPDE cars which makes sense

I haven't seen any regulation that requires a Petty bar (what you pictured). What they do require is bracing on the longitudinal axis, and a Petty bar is one way to do that. The usual way is to have rear supports for the main hoop, which is easy to do on an NA/NB:



On an NC/ND, the top folds differently, and you can't use the same design without removing the soft top. So you see designs like the Petty bar or the removable rear bracing from the trunk linked above.

As far as safety for street use, check out the picture above, and tell me if you think the passenger is safe from hitting their head on the bar. The bar in the picture does have the recommended high-density foam padding, but that's not enough to protect your head in a rear-end collision. You're supposed to wear a helmet or install a seat with a high enough back to protect your head.

This is still, IMO, the twins' biggest advantage if you want your car to serve double duty as a track toy and daily driver.

My personal solution is to keep my NB when I buy an ND next year.

[glamcem]

Originally Posted by Entroper

I haven't seen any regulation that requires a Petty bar (what you pictured). What they do require is bracing on the longitudinal axis, and a Petty bar is one way to do that. The usual way is to have rear supports for the main hoop, which is easy to do on an NA/NB:



On an NC/ND, the top folds differently, and you can't use the same design without removing the soft top. So you see designs like the Petty bar or the removable rear bracing from the trunk linked above.

As far as safety for street use, check out the picture above, and tell me if you think the passenger is safe from hitting their head on the bar. The bar in the picture does have the recommended high-density foam padding, but that's not enough to protect your head in a rear-end collision. You're supposed to wear a helmet or install a seat with a high enough back to protect your head.

This is still, IMO, the twins' biggest advantage if you want your car to serve double duty as a track toy and daily driver.

My personal solution is to keep my NB when I buy an ND next year.

I have no experience with NA/NB but looking at the picture it's easier to see why the denser padding is required

douple hoop bar on my NC miata was a lot more street-friendly but it was also more expensive than "Hard Dog",

also need to add, it's dramatically cheaper to mod an NA or NB compared to an NC Miata, not sure how the ND will be..too bad the new ND doesn't have a special motor like the NC but instead comes with a mass produced low-revving Mazda 3 engine :/

this would be my favorite mod if I ever go back to Miata
http://www.bbrgti.com/product_detail...e=18&model=531

[Entroper]

NC used the MZR engine, which was also the mass-produced Mazda3 engine at the time. The NC2 added forged rods and crank, but the Skyactiv engine has those in the Mazda3 already.

The ND version of the Skyactiv has been tuned for 91 octane. The torque peak is marginally higher, and the throttle response is significantly improved, especially in the low range. There was an interview somewhere with Dave Coleman where he explained that part of the reason for DBW throttle delay is to control detonation from snapping the throttle open too quickly.

EDIT: There's a really good and thorough review of the Skyactiv tech here: http://www.motoiq.com/MagazineArticl...echnology.aspx

[86Tony]

The answer is always miata

Sent from my SM-N910W8 using Tapatalk

[Entroper]

Another track, another test, another result:

MX-5 still wins, but by less than an eye blink this time. Pretty cool side by side with a little bit more detailed commentary on how the laps were different.

[why?]

Originally Posted by Entroper

Another track, another test, another result:

MX-5 still wins, but by less than an eye blink this time. Pretty cool side by side with a little bit more detailed commentary on how the laps were different.

That was a fun review to watch, someone that gets these cars aren't all about the quickest lap times.

[ben721364]

Originally Posted by why?

That was a fun review to watch, someone that gets these cars aren't all about the quickest lap times.

For sure when the car is sliding sideways it's not advancing.

[DarkSunrise]

Originally Posted by Entroper

Another track, another test, another result:

MX-5 still wins, but by less than an eye blink this time. Pretty cool side by side with a little bit more detailed commentary on how the laps were different.

Nice video. It's amazing to see how much Evo has come around on the Twins. Their initial reviews (especially of the BRZ) were quite harsh. Now you'd think they almost enjoy these cars!

The ND Miata as spec'd in that video seems to be good value. About 2000 GBP cheaper than the GT86, but comes with the torsen limited slip. I wonder if it's the equivalent of the US club spec but at a relatively lower cost.

[HUNTERANGEL121]

http://forum.miata.net/vb/showthread.php?t=589349

Anyone see this yet?