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11-08-2008, 05:30 PM | #1 |
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18s vs 19s weight?
Anyone know what the weight disparity is? And if the 19s are more, what they essentially slow the car down a bit, even if they added higher cornering numbers?
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11-08-2008, 05:58 PM | #2 |
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When I swapped my 18 to 19 on my 350z I would loose about 20 rwhp... So yes bigger wheels bigger tires = more rotational mass = less hp! If you dont believe me try it for your self go to a dyno and swap them out and you'll see..
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11-08-2008, 07:18 PM | #4 |
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I heard the 19's were around 30lb.
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11-08-2008, 11:00 PM | #5 |
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Not true. Not even close...
Why don't you guys just simply search this site and get the exact figures rather than guessing? There have been several threads with data on this...
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11-09-2008, 03:21 AM | #6 |
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Hmmm, haven't found any numbers yet. Must have been searching wrong threads. Any help is appreciated.
Even if the 19s DO weigh less (hard to believe) being bigger, is what's mentioned above true? More rotational mess, more resistance, loss of power? |
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11-09-2008, 05:19 AM | #7 |
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The numbers you are looking for are in the weight loss thread. I believe you can find it just by searching for topics with "weight" in the name.
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11-09-2008, 07:17 AM | #8 |
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The 19 inch wheel is slightly heavier but the 18 inch tire is also heavier than the 19 inch tire. So with the wheel and tire combo you save weight with the 19's. Hope that helps.
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11-09-2008, 08:06 AM | #9 | |
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Stock 19" wheels weigh 25.4/26.1 lbs. Stock 18" wheels weigh 25.5/26.5 lbs It is true that the 18" PS2s are about 1 lb heavier than the 19" PS2s (check tirerack on weight specs), so that would make the stock 18" setup heavier than the 19" setup. Rotational inertia has to do with how mass is distributed along a rotation axis. The further away from the hub the mass is distributed the higher the rotational intertia, the slower the acceleration. We don't have info on how mass is distributed exactly in the two setups, but it is highly likely for the 18" setup to have a slighly higher rotational inertia than the 19" setup. The stock 19" wheels are rather nice IMO, in looks and in performance. One can obviously get lighter 19" wheels, but they'd be expensive and perhaps not as strong. The 18" wheel setup has a better ride quality and would most likely perform better on the track though.
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11-09-2008, 10:09 PM | #11 | |
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11-09-2008, 10:20 PM | #12 | |
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What kind are they?
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11-10-2008, 12:29 AM | #13 | |
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Thx again! |
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11-10-2008, 01:09 AM | #14 |
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They are Volk RE30's They go for about $2800 shipped with out tires..
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11-10-2008, 01:14 AM | #15 | |
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I am looking for a 27" diam DR tire to stick on my spare wheels so I can hold every gear longer so I dont have to shift into 4th... Shifting = time
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11-10-2008, 01:49 AM | #16 |
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the 19 combo (tire and wheel) weighs less. than the 18. search is your friend.
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11-10-2008, 11:56 AM | #17 |
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11-10-2008, 11:58 AM | #18 | |
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I ask because in my best stock time of 13.2, came when I turned the ECT Pwr button of, which ACTUALLY does NOT allow the tranny to hold gears quite as long. |
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11-10-2008, 01:12 PM | #19 | |
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11-10-2008, 10:23 PM | #20 |
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Hum I never done a pass with it turned off?? It should better your time cuz you dont have to shift before the traps..
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11-11-2008, 01:03 AM | #21 |
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11-11-2008, 01:05 AM | #22 | |
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