Savington

iTrader: (31)

Don't quote me, but 30 seconds of Google says that the factory Mazda spare is often a 4" wide wheel.

SchmoozerJoe

iTrader: (2)

Too heavy?

sixshooter

iTrader: (12)

Heavy and not rated for more than 65mph in the quarter.

DNMakinson

iTrader: (3)

Between this discussion, many internet searches, and some comments from Sonofthehill, I think wrinkle wall slicks, which I understand also means a driveshaft hoop, and my 195-50 Dunlops on the front. We're talking 105mph in a straight line. Slicks will be M&H 23 x 7.5, Part Number MHR-021.

Dusterbd13

So, say i have a 14x6 rear wheel. And the need for wrinkle wall slicks.

what size? Again, planning 325rwhp/325 torque.

and yes, both halfshafts and driveshaft need safety loops per nhra

DNMakinson

iTrader: (3)

Pick up a couple of 15 x 6 NB1 rims and use what I quoted above. I don't see anything available for 14's, except Mickey Thompson in a 26" diameter. 13's or 15's.

Where are you located?

Crap... and halfshafts? That might change my approach. No hop, no care.

ctdrftna

iTrader: (1)

my track never checked for a loop, but yeah you should have a driveshaft loop. I think If you just made a loop to enclose a section of the PPF it would be ok. 23x8x13 MH is what you want. the 13's will fit over stock 1.8l brakes.

Dusterbd13

The 15x6 will be have my sm7 autocross slicks.

im outside Charlotte nc

julio

iTrader: (4)

Someone needs to do a drag car with 15 x 6 6UL's in front and 15 x 12's in the rear. I'm not normally a "drag race" guy but when I do, I'd do 6UL's.......

15" wheels

TalkingPie

This article is (slightly) relevant to this thread:
https://blog.caranddriver.com/how-mu...-ford-mustang/

sixshooter

iTrader: (12)

That's unfortunate. You will fail.

sixshooter

iTrader: (12)

Dead weight. 10's are enough for 1000 hp. Bp's don't make 1000 hp.

miata2fast

iTrader: (2)

The key to success on a mildly built Miata is use the smallest slick money can buy. My best 60’ was 1.719 on a set of 20”x8”x14” on stock wheels way back in the day when I was running nitrous. At the time the car was mostly stock with an open diff. My car is a base model.

Those tires aren’t available anymore. Today I run 22x8x15.

DNMakinson

iTrader: (3)

Lots of local sources for the 15 x 6's for you. I have a pair here you could drive down for.

Is that for the extra sidewall height, more flex?

ctdrftna

iTrader: (1)

Yes I would run the 23’s over the 22’s personally for more side wall flex and to match a normal street tire diameter better

miata2fast

iTrader: (2)

I don’t think the extra sidewalk is any benefit at all. If anything, for lower powered cars it may hurt. You get the benefit of less rolling resistance with less sidewall, and in my experience you can 60’ exceptionally well with a very small tire. I have very little wheel hop with the lower profile tires.

In a much higher powered car it’s another matter.

Savington

iTrader: (31)

What qualifies as "much higher powered"?

Asking for a friend

miata2fast

iTrader: (2)

In your ‘friends’ case, 24.5x8x15 Mickey Thompson and 4.10 gear

DNMakinson

iTrader: (3)

I did some more looking. Donut TIRES are not NHRA legal. Donut rims are not discussed, that I could find. They will fit Front Runners from about anyone.

In Australia, the rims are not legal.

I have ordered the Rule Book.

Erat

iTrader: (5)

You also can't run a sub 13 second pass without a roll bar. I've been talked to about it.