Subaru Testing a BRZ with STI Badging and a Big Wing

[Doubletap]

If I had to GUESS. The power bump would be from new headers, exhaust and a factory (STi) tune. Nothing major but just enough of a bump to make it interesting.

[G-awesome]

betcha its gonna be all looks and no performance gains...

[nikitopo]

Originally Posted by WolfpackS2k

A power modified BRZ, let's say with 250-300 hp, would cope just find with wider rubber under it's fenders. Nothing beyond that is required.

The actual grip that a tire can generate is dictated by the coefficient of friction of the rubber compound used in the tire. The higher the coefficient, the more grip which can be generated. The relation that is used is called Amonton's Law, and the equation is:
F=uN,
where F is the force generated, u is the coefficient of friction, and N is the weight on the surface considered (in our case, the weight on the tire).

If you increase the weight on the tire, then the frictional force will increase as well . The tire width is not so relevant.

This is also a reason a rear wing is a nice option, because it increases the downforce and hence the weight . Unfortunately, it doesn't work on low speeds ...

[norcalpb]

Originally Posted by MJones_RB

Latest word is they will offer the BRZ tS in the U.S. No new power.

Which is completely fine. I've been waiting for the TS since the first one in 2013. People expecting a power bump are going to be disappointed.

[krayzie]

Team power bump should just move to Japan and buy this.

[ztrevs]

Originally Posted by MJones_RB

Latest word is they will offer the BRZ tS in the U.S. No new power.

I just want that giant wang.

[NLS8520]

I think we all know deep down exactly what it will be a us version of the tS..Not exactly what a majority were hoping for, but I am sure it will be nice.

[Drambeenie]

I just want that lipstick piece they've had in Japan!

[DSOmegaX]

Originally Posted by NLS8520

I think we all know deep down exactly what it will be a us version of the tS..Not exactly what a majority were hoping for, but I am sure it will be nice.

I would temper expectations even from that. I doubt it would incorporate all the changes off the tS. Just a select few accessories

[DSOmegaX]

Originally Posted by Drambeenie

I just want that lipstick piece they've had in Japan!

It's gonna be white/silver for the US market it looks like

[Zaku]

I hope that this will give us parts! in the US catalog kinda like the TRD stuff here. I would love the STI springs and the little bits and badges. I want factory parts dammit!

Originally Posted by krayzie

Team power bump should just move to Japan and buy this.

I would love to buy those wheels! too bad I already have the STI set waiting for some love : (

Originally Posted by ztrevs

I just want that giant wang.

I want it too, but we would have to put it on top of the wing with out trunks, we'll have double the down force! unless we can get something thta plug the holes or a new trunk lol

[Drambeenie]

Originally Posted by DSOmegaX

It's gonna be white/silver for the US market it looks like

Easy to paint! Gonna get it in Acid Green, same as my calipers.

[armstrom]

Originally Posted by nikitopo

The actual grip that a tire can generate is dictated by the coefficient of friction of the rubber compound used in the tire. The higher the coefficient, the more grip which can be generated. The relation that is used is called Amonton's Law, and the equation is:
F=uN,
where F is the force generated, u is the coefficient of friction, and N is the weight on the surface considered (in our case, the weight on the tire).

If you increase the weight on the tire, then the frictional force will increase as well . The tire width is not so relevant.

This is also a reason a rear wing is a nice option, because it increases the downforce and hence the weight . Unfortunately, it doesn't work on low speeds ...

While your comment about the formula for friction is fundamentally correct it is incorrectly applied to tire grip. The statement that friction is independent of contact area is only true if the coefficient of friction remains constant. The rubber compounds used in tires actually change coefficient of friction as pressure increases. A wider tire distributes the weight of a car across a larger contact patch surface area. Even if the coefficient of friction between tire and road were constant a wider tire would still be preferable for grip. The fundamental laws of sliding friction do not address the ability of the material to withstand the forces involved without being destroyed. The friction force between the tire and road has to be absorbed entirely by the contact patch. A smaller contact patch results in a greater force trying to rip individual rubber molecules from the main body of the tire.

Here's a little thought experiment that illustrates my point. Imagine you have a rectangular block of lead with velcro on two faces. one face has a surface area of 5in^2 and the other has an area of 10in^2. Now, attach patches of rubber of matching area to the two faces and drag the block on each of the faces. While it's true that the force due to sliding friction will be the same regardless of dragging on the large face or the small face the smaller face will be more likely to tear free from the velcro because that same force is being distributed over a smaller area compared with the larger face. The same thing is happening in your tire, just imagine that the velcro being replaced by the molecular bonds holding rubber molecules at the surface of the tire to the molecules under them.

-Matt

[DSOmegaX]

Originally Posted by Drambeenie

Easy to paint! Gonna get it in Acid Green, same as my calipers.

Not as easy as it looks. Since the part is flexible, the bends make it difficult to paint as it can crack, stretch, or no adhere. Some have tried it to varying degrees of failure/success using the EU silver stripe part.