Focus RS
http://www.awdwiki.com/en/quattro+evolutions/
http://www.awdwiki.com/en/haldex/
The STI uses a driver controlled active center diff. http://www.torquenews.com/1084/why-2...l-awd-hardware
Why does this matter? Maybe to you it does not. To me, I would rather have a true full time awd system.
It creates a power difference, or differential. It's a differential, and it is very active. Able to send anywhere 0 to 70% power to rear. No, it's not the traditional spider gear/hypoid diff, but it is a diff. I want to actually drive one without nannies on to see how it well it works. My only experience is the MK6 R I drove which always shut down the fun too soon.
I would actually prefer the haldex system if it was the other way around. RWD, and able to engage the front as needed. Like the GTR. The "true" full AWD stuff is quite antiquated for road car use. Most car use some kind of system that is quite rear biased, if not totally rear biased until wheel spin, or potential for wheel spin, is detected and the front is engage as needed...
I would actually prefer the haldex system if it was the other way around. RWD, and able to engage the front as needed. Like the GTR. The "true" full AWD stuff is quite antiquated for road car use. Most car use some kind of system that is quite rear biased, if not totally rear biased until wheel spin, or potential for wheel spin, is detected and the front is engage as needed...
What, in your opinion, makes it "antiquated?" Both the STI and RS5 use a center diff to produce near 40:60 static torque split front and rear. From my understanding, clutch based torque splitting cannot be "full time" because of heat.
Last edited by nemsin; Oct 26, 2015 at 01:03 PM.
Most supercars don't have a static torque split anymore, technology has progressed beyond that. It helps remove the push most AWD cars experience when at the limit (like the Audi sedan's with full time Quattro). R8's and Lambo's for example send 10% to the front, and up to 30% as needed with a viscous coupling. Sort of the same with late model Porsche's, but with a different split. GTR is the same way. etc, etc, etc. It allows the front tires to focus on turning when they aren't needed for putting down power.
Seems like the cars you are describing still have a static torque split (even if its 10:90) and are thus full-time awd. It sounds like the Focus RS default is 100:0, i.e., on demand awd.
Last edited by nemsin; Oct 26, 2015 at 03:11 PM.
The audi's and Subaru center diff works the same as an Evo. It's a fixed bias with an active clutch pack to make sure the bias doesn't change due to a lack of grip at one end of the car (typically the front).
You ever wonder why haldex cars get better fuel mileage than the "static" system cars? It's because it can decouple from the extra drive axle. When a static 40/60 bias car like an Audi is cruising, the front axle is still getting 40 percent power, wasting fuel by make the engine turn the extra drivetrain parts. Which is why an a4 awd is rated at less than 25mpg highway, but the A4 fwd is rated close to over 30, similar to awd golf r.
This sounds like the conversations that went down when the new Miata was announced:
A: The new Miata doesn't have enough power.
B: It has the same power to weight ratio as the older cars.
A: Well it needs like 250 HP to get my interest.
B: That would give it the same ratio as a Corvette.
A: Perfect.
B: So why not buy a Corvette?
A: I don't want a Corvette, I want a Miata with Corvette power.
B: But that will upset the balance.
A: Who cares about balance, I want power.
B: Miatas have always been about balance.
A: That's why they're gay, they need more power.
B: So you want a Miata that doesn't have Miata balance, and Corvette power?
A: Yes, is that so hard to ask? Oh and it has to cost less than $30,000, and be reliable, and look like an Italian sports car.
A: The new Miata doesn't have enough power.
B: It has the same power to weight ratio as the older cars.
A: Well it needs like 250 HP to get my interest.
B: That would give it the same ratio as a Corvette.
A: Perfect.
B: So why not buy a Corvette?
A: I don't want a Corvette, I want a Miata with Corvette power.
B: But that will upset the balance.
A: Who cares about balance, I want power.
B: Miatas have always been about balance.
A: That's why they're gay, they need more power.
B: So you want a Miata that doesn't have Miata balance, and Corvette power?
A: Yes, is that so hard to ask? Oh and it has to cost less than $30,000, and be reliable, and look like an Italian sports car.
haha, nobody is gonna let you test drive one of these... at least not at first while they're still limited allocations
no, happens a lot. and even if not officially limited, it just happens for some popular cars that are in high demand...
my dad is trying to buy a honda pilot touring and they've been sold out everywhere for months
no, happens a lot. and even if not officially limited, it just happens for some popular cars that are in high demand...
my dad is trying to buy a honda pilot touring and they've been sold out everywhere for months
I have no doubt the Focus RS will be a great street car. As for the track, time will tell how well it performs (and how reliable the awd system is with increased hp). The RS engineer's post about added hp going exclusively to the front wheels should be concerning to anyone thinking of turning up the hp.
Originally Posted by nemsin
I have no doubt the Focus RS will be a great street car. As for the track, time will tell how well it performs (and how reliable the awd system is with increased hp). The RS engineer's post about added hp going exclusively to the front wheels should be concerning to anyone thinking of turning up the hp.