Real or Fake

Waiz

If you are looking for performance than you don't want Vossens, 28lbs for a cast wheel vs 20lbs for a forged Volk is not worth it.

I have seen their wheels up close too and honestly don't seem like a quality wheel to me. I know they are a vendor on this forum and others run them but you will never see a set on any of my vehicles.

Keep your Volks

SgtGoldy

With the 20" CV3 I'd be adding close 5lbs to each wheel. Not sure if thats excessive or not. I can't see it affecting my performance all that bad, but then again I don't know much about that part of performance modding.


Vossen:
24lbs front and 26lbs rear
(20x9) front and (20x10.5) rear

Volk (Current Setup):
19lbs front and 21lbs rear
(19x8) front and (19x8.5) rear

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Waiz

Well upgrading to 20" wheels will also mean larger rotating mass and also heavier tire. If it was me I would pass

Volk Z

When you say "Volks" you don't mean the stock Rays wheels do you? If you care about weight but don't want to spend a ton of money grab a set of Weddsport SA55m they are like 2300 shipped for a 19 inch set and weigh 21 pounds a piece and are made in JAPAN and you can go with a more aggressive offset and more width and that would look 1000 times better then the dinky widths you have on there now...

Or even a better idea buy some 370z Nismo wheels, they are a concave 5 spoke design like you like but weigh 20-21 pounds and are forged with 19x9.5 front and 19x10.5 rear with Advan sport tires....

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jujubii

adding 5lbs to each wheel is horrendous. it will make your car significantly slower.
i went from the stock g37 18s (which were ~27lbs) to the 370z s-tunes (20.5lbs and 21lbs) and stock tires(28lbs) to conti DWs (25lbs and 27lbs). let's just say it was the best $18XX i've ever spent on my car. i can lift the a wheel+tire with 1 arm now too LOL
simple google search can explain why... if you're a 'performance' guy, then vossens are definitely not the way to go.

you're on the g37 forums and if you look around you can find a post by a mechanical engineer (im banging my head against the wall because i cant find it) who compared different gains an losses from different mods from a scientific perspective. he concluded that rim upgrades are, by far, the best performance upgrades a car can receive (besides forced induction).

here's a good video, btw:
The Science of Wheel Performance: Rotational Inertia - YouTube