[Deslock]

Originally Posted by babydriver

Do you mean that the FR-S is about as fast as the 2016 or the 2015 Mazda? I test drove both the 2015 FR-S and the Miata MX-5 almost back to back last September, on the same day. There was no doubt in my mind that the FR-S had better acceleration and more power than the 2015 Mazda. It also handled better.

Clarification, please!

I haven't driven an NC2 in years, but in my experience, the FT86 and NC2 offer similar acceleration. The FT86 is more planted (stiffer chassis, less body roll) but the NC2 hangs with it in the curves.

Originally Posted by babydriver

For the sake of discussion, using these number results in a PTW ratio of:

2290 (lbs)/155 (hp) = 14.8 lbs per 1 hp

2360 (lbs)/155 (hp) = 15.4 lbs per 1 hp

As a reminder, the FR-S PTW ratio is:

2753 (lbs)/200 (hp) = 13.8 lbs per 1 hp

Of course, we will have to wait for the true curb weight to be made available before a precise number can be provided.

Again:

Originally Posted by Deslock

You can't go by peak power alone.

The ND will make less power, but it'll have a significantly wider power band. That combined with its lower weight should make it about as fast as the FT86.

A bunch of hypothetical benchracing:

Miata Assumptions:

Rollout    0
Shift time 0.2
Efficiency 0.85
Launch     4000
Cd         NC: 0.34
           ND: 0.33
Area       NC: 2.140
           ND: 2.135
Tires      2L models: 205/45R17
           1.5L:      195/50R16
Gearing    2L models: 3.76 2.27 1.65 1.26 1 0.84 / 4.1
           1.5L:      3.82 2.26 1.64 1.18 1 0.79 / 4.1
Mass (kg): NC2:       1227 (with driver)
           ND2L:      1127 or 1158 (est with driver)
           ND1.5L:    1086 or 1109 (est with driver)

Results (with a couple values for mass and shift points):

car     kg    hp   lbf*ft shift 0-60  1/4
NC2L    1227  167  140    7500  7.28  15.57
NC2L    1227  167  140    7200  7.34  15.63
ND2L    1158  155  148    7000  7.18  15.49
ND2L    1158  155  148    6800  7.20  15.51
ND2L    1127  155  148    7000  7.13  15.43
ND2L    1127  155  148    6800  7.15  15.46
ND1.5L  1109  129  111    7500  7.81  16.06
ND1.5L  1086  129  111    7500  7.74  16.00

We don't know what the gearing in the ND will be, so FWIW.

FT86 Assumptions:

Rollout    0
Shift time 0.2
Launch     5000
Cd         BRZL: .28
           FRS:  .29
Area       1.97
Tires      215/45R17
Gearing    3.626 2.188 1.541 1.213 1 0.767 / 4.1
Mass (kg): BRZL: 1348 (with driver)
           FRS:  1340 (with driver)

Results:

car  0-60  1/4
BRZL 6.92  15.31
FRS  6.91  15.31

That's with the FT86 hitting 60 MPH in 2nd gear. If it shifted to 3rd before hitting second (like the NC2 does and the ND will unless its gearing is taller), then the BRZ does 0-60 in 7.14 and the FRS in 7.12. Conversely, if the ND is geared tall enough to hit 60 in 2nd, it ought to be able to do 0-60 in 6.92 sec.

Different testers get different times, and we've seen both the Miata NC2 the FT86 do 0-60 in the low 6s and the 1/4 mile in high 14s. But going by the specifications (and a lot of educated guesses) and using the same formulas, the ND should be only one or two tenths slower.

It'll be interesting to see how it does in the real world. Many think the NC2 is slightly underrated, which the spreadsheet results support (looking at its on-paper vs real-world performance compared to the FT86). If the ND is underrated, it could match or even beat the FT86.

Originally Posted by chaoskaze

With spec on ND if the gear selection is as good as NC it will be ahead of 86 on tech track cuz our torque dip....

Not sure if serious.