30x9 slicks

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408 Nova
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30x9 slicks

Post by 408 Nova »

Why do a lot of stockers and super stockers run them? Maximum traction that will fit in the fender well?

And who is the best manufacturer for them? I'd like to run them or some 29x9's if they will fit without cutting anything.

Application is a small tire, 5 speed, 900 hp, and 2700 lbs race weight 68 Nova with Cal-Tracs.
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Re: 30x9 slicks

Post by 6.50camaro »

9" is the widest tire allowed in Stock eliminator. 30 is about the tallest that will fit in stock wellhouse openings with some legal trimming.
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Re: 30x9 slicks

Post by 1972ho »

And 30 is also the largest diameter for stockers even superstock car are limited to 32 diameter.
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Re: 30x9 slicks

Post by vortecpro »

You probably won't run a 30x9 radial on a stick car.
Racing a NA NHRA stocker should be mandatory before any posting.
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Re: 30x9 slicks

Post by F-BIRD'88 »

On your light weight car (if its really only 2700 lbs)
You may find that adding ballast weight over and or behind the rear axle may help.
9x29 drag race slicks hook good. 900 hp and a 5 sp manual may be a challange.
The bias ply "wrinkle wall" slicks create a bigger longer tire foor print on the road surface and tend to be better to hook up on less than ideal tracks.
The radial type slicks need more exact chassis setup and work best on well prepped sticky tracks. The top end mph tends to be a bit better.
Both types will require you being on yiur game with chassis, weight distribution, tire pressure, cal trac setup,
Transmission gear choice and rear gear optimination to get the best possible car perf out of the engine HP.
With just a 9" slick its not all going to happen on the first track day.

Goodyear, Mickey Thompson, Hoosier. Everybody has their favourites.

Is this a "Power Adder" car?
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Re: 30x9 slicks

Post by 1980RS »

The 1st time I tried a set of 30X9 radial slicks was in 2019 at a muscle car event over my 28X9 bias ply slick. Even spinning a touch my car was well over a tenth quicker and almost 2 mph faster with them and I did do the back to back test, the car did slow down with the bias tires both times. I am sold on these tires.
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Re: 30x9 slicks

Post by 408 Nova »

F-BIRD'88 wrote: Mon Jan 30, 2023 10:34 pm On your light weight car (if its really only 2700 lbs)
You may find that adding ballast weight over and or behind the rear axle may help.
9x29 drag race slicks hook good. 900 hp and a 5 sp manual may be a challange.
The bias ply "wrinkle wall" slicks create a bigger longer tire foor print on the road surface and tend to be better to hook up on less than ideal tracks.
The radial type slicks need more exact chassis setup and work best on well prepped sticky tracks. The top end mph tends to be a bit better.
Both types will require you being on yiur game with chassis, weight distribution, tire pressure, cal trac setup,
Transmission gear choice and rear gear optimination to get the best possible car perf out of the engine HP.
With just a 9" slick its not all going to happen on the first track day.

Goodyear, Mickey Thompson, Hoosier. Everybody has their favourites.

Is this a "Power Adder" car?
No sir, it's an all motor car. It really will weigh 2700 lbs when we get it back together. The block is aluminum and the car has a Smith Racecraft chrome moly front end under it, lightweight brakes and all that kinda stuff.

It's for a heads up small tire class, run what you brung.
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Re: 30x9 slicks

Post by steve cowan »

1980RS wrote: Tue Jan 31, 2023 10:27 am The 1st time I tried a set of 30X9 radial slicks was in 2019 at a muscle car event over my 28X9 bias ply slick. Even spinning a touch my car was well over a tenth quicker and almost 2 mph faster with them and I did do the back to back test, the car did slow down with the bias tires both times. I am sold on these tires.
Bob,
Do you recall what the rpm difference was between the 2 at the finish line?
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Re: 30x9 slicks

Post by 1980RS »

steve cowan wrote: Tue Jan 31, 2023 1:42 pm
1980RS wrote: Tue Jan 31, 2023 10:27 am The 1st time I tried a set of 30X9 radial slicks was in 2019 at a muscle car event over my 28X9 bias ply slick. Even spinning a touch my car was well over a tenth quicker and almost 2 mph faster with them and I did do the back to back test, the car did slow down with the bias tires both times. I am sold on these tires.
Bob,
Do you recall what the rpm difference was between the 2 at the finish line?
I think it was around 250 rpm Steve.
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Re: 30x9 slicks

Post by 1972ho »

If the new copo mustang and dragpac supercharged cars can hook up and go down the track with 30x9 slicks mostly Hoosier they can sure get your car down it but you will have to get some really good shocks and suspension to get it done.
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Re: 30x9 slicks

Post by Jeff Lee »

408 Nova wrote: Tue Jan 31, 2023 11:13 am
F-BIRD'88 wrote: Mon Jan 30, 2023 10:34 pm On your light weight car (if its really only 2700 lbs)
You may find that adding ballast weight over and or behind the rear axle may help.
9x29 drag race slicks hook good. 900 hp and a 5 sp manual may be a challange.
The bias ply "wrinkle wall" slicks create a bigger longer tire foor print on the road surface and tend to be better to hook up on less than ideal tracks.
The radial type slicks need more exact chassis setup and work best on well prepped sticky tracks. The top end mph tends to be a bit better.
Both types will require you being on yiur game with chassis, weight distribution, tire pressure, cal trac setup,
Transmission gear choice and rear gear optimination to get the best possible car perf out of the engine HP.
With just a 9" slick its not all going to happen on the first track day.

Goodyear, Mickey Thompson, Hoosier. Everybody has their favourites.

Is this a "Power Adder" car?
No sir, it's an all motor car. It really will weigh 2700 lbs when we get it back together. The block is aluminum and the car has a Smith Racecraft chrome moly front end under it, lightweight brakes and all that kinda stuff.

It's for a heads up small tire class, run what you brung.
If in fact it is a “small tire” class...check your event rules as I believe most consider a 30" diameter a “large tire"
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Re: 30x9 slicks

Post by EDC »

1980RS wrote: Tue Jan 31, 2023 10:27 am The 1st time I tried a set of 30X9 radial slicks was in 2019 at a muscle car event over my 28X9 bias ply slick. Even spinning a touch my car was well over a tenth quicker and almost 2 mph faster with them and I did do the back to back test, the car did slow down with the bias tires both times. I am sold on these tires.
Rolling resistance and lack of growth with the radials.

They work!

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