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Ultimate AWD Sports Sedans

828 messages,  Last post on Oct 03, 2009 at 9:40 PM

You are in the Sedans Forum. Your Hosts are pat & karens

What is this discussion about? BMW 3 Series, Audi A4, Volvo S60 R, Subaru Legacy, Audi S4, Mazda MAZDASPEED MAZDA6, Sedan


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#725 of 828
Re: Crunched tire numbers... [ateixeira] by kyfdx HOST
Mar 20, 2008 (1:57 pm)
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Replying to: ateixeira (Mar 20, 2008 12:35 pm)

That would mean their tolerances have to be within 3/10ths of a percent? Do you think that's realistic in the real world?
 
I'd think you could find variances larger than that on new tires of the same model..
 
You sure the 0.25 inches isn't diameter?
#726 of 828
Re: Crunched tire numbers... [kyfdx] by ateixeira
Mar 21, 2008 (5:30 am)
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Replying to: kyfdx (Mar 20, 2008 1:57 pm)

Pretty sure it's circumference.
 
That's Subaru's specification, at least.
 
People complain when they blow out one tire (beyond repair), because if you have more than 10,000 miles on your other 3, you need a new set, or you have to shave the new tires to match the others, or find a used tire with similar wear.
 
Most people just buy 4 new tires.
#727 of 828
Re: Crunched tire numbers... [shipo] by bruceomega
Mar 21, 2008 (11:48 am)
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Replying to: shipo (Mar 20, 2008 4:14 am)

Shipo,
 
If 17" is an ideal size, does that mean, in your opinion, that if I upgraded from the standard 17" wheels on my 535Xi to the optional 18" wheels and appropriately sized tires (probably non staggered per your comments) that it will not improve the handling of my car?
 
Thanks
Bruce
#728 of 828
Re: Crunched tire numbers... [bruceomega] by shipo
Mar 21, 2008 (4:49 pm)
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Replying to: bruceomega (Mar 21, 2008 11:48 am)

If I remember correctly, handling performance peaked with the 16" and 17" tire sizes and then slowly rolled off from there. Regarding adding the 18" optional tires on your car, I rather suspect that you'll probably not notice much of a difference either way, errr, unless you're going to be taking it to the track.
 
Best Regards,
Shipo
#729 of 828
Re: Crunched tire numbers... [bruceomega] by ateixeira
Mar 24, 2008 (8:20 am)
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Replying to: bruceomega (Mar 21, 2008 11:48 am)

It may sharpen the steering feel a bit, and have less sidewall deflection, but the ride will feel more harsh and you may have passed the point of diminishing returns by then.
 
A friend had a Z3 with big wheels and bent 3 rims. No kidding.
 
They're expensive to replace, and in some cases he even had to wait for a special order. Tires are also more expensive.
 
Finally, it adds to your unsprung weight, compared to a lighter 16" or 17" alloy of the same construction.
#730 of 828
Performance suspension for the 335Xi by bruceomega
Apr 15, 2008 (11:42 am)
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FWIW,
 
I just read where BMW is now offering an aftermarket performance suspension for the 335Xi:
http://accessories.bmwusa.com/ItemView.aspx?modelId=280&perf=true&categoryId=136- &productCategoryId=&menuId=0&subItemId=3
 
With a tighter, sportier feeling and lower suspension setting of 15mm in comparison with series-production vehicles, the inclusion of a BMW Performance control arm with stiffer bushings gives your 3 Series an almost instinctual feel for the road. With adjusted spring rates and bushings, roll is drastically reduced, creating cat-like quickness, increased responsiveness, and stunning agility. Flexing with the motion of your vehicle around even the tightest curves, a BMW Performance control arm means athletic handling, faster turn-ins, and a totally immediate and much more intense reaction to the tarmac. It delivers a perfect compromise between racing car performance and driving comfort.
 
$695.00
Each price is the suggested retail price and is subject to change. Price excludes installation and taxes

 
Bruce
#731 of 828
Re: Performance suspension for the 335Xi [bruceomega] by circlew
Apr 15, 2008 (12:11 pm)
Reply

Replying to: bruceomega (Apr 15, 2008 11:42 am)

I still doubt it will be equal to suspension settings of 335i sport.
 
Regards,
OW
#732 of 828
Re: Performance suspension for the 335Xi [bruceomega] by lilengineerboy
Apr 15, 2008 (5:16 pm)
Reply

Replying to: bruceomega (Apr 15, 2008 11:42 am)

$700 bones for 4 control arms isn't bad even if they were stock. I think thats about what they were on my '93 Accord. It says the bushings are stiffer and the ride height is lower, but it doesnt say anything about spring rate. Another positive thing is they might have lowered the car without giving up any suspension travel, which is a good thing.
#733 of 828
Re: Performance suspension for the 335Xi [lilengineerboy] by bruceomega
Apr 16, 2008 (10:46 am)
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Replying to: lilengineerboy (Apr 15, 2008 5:16 pm)

They do mention ..... With adjusted spring rates .....
#734 of 828
Zap-X by circlew
May 09, 2008 (3:17 am)
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It's on the way..I'll be all over this thing! Here are two articles.
 
ZAP-X is a Crossover Electric Vehicle designed by ZAP Motors and Lotus Engineering derived from the Lotus APX concept platform. The vehicle is estimated to be launched in 2010. The company claims that this car would be powered by a four in-wheel electric motors that generates 644 bhp (480 kW/653 PS) and reaches 350-mile or 560 km with a single charge. It also boasts a top speed of 155 mph or 249 km/h, acceleration of 0–60 mph in 4.8 s and a 10 min recharge time.
 
ZAP, in partnership with Lotus Engineering have designed a new EV that will result in one of the most advanced electric cars ever developed. The aptly-named ZAP-X Crossover does potentially offer a very real transition option from conventional combustion vehicles, as the short-falls of electric vehicles have been almost completely eradicated in this new design. The award-winning APX lightweight aluminium architecture allows for unparalleled performance and usability. The drive system comprises of innovative electric motors inside each of the wheels, which in partnership can deliver up to 644 horsepower, and speeds of 0-60mph in 4.8 seconds, up to a maximum speed of 155mph. The power system enables the vehicle to travel up to 350 miles before needing a charge, and the new rapid-charge technology allows for battery recharging in as little as 10 minutes. Seating allows for up to 7 passengers (not a type-o) and some very cool new gadgets included as standard too, such as touch-screen controls, Wi-Fi, Bluetooth, High-Res Video, Windows XP, iPod Ready, firewire, GPS, USB2 and more! Regenerative braking as standard, and energy collecting windows and windshields allow for some additional charging, too.
 
With everything you’d want out of a conventional sports car, it also has the versatility of being used as a family vehicle too!

Regards,
OW

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