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      04-28-2010, 09:57 PM   #23
Graham M
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^ can you explain that further?
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      04-28-2010, 10:00 PM   #24
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Quote:
Originally Posted by inTgr8r View Post
...and it's not just the weight of a 19;
it's also where the weight is located.

The barrel, which for arguments sake, is the same on a 18 & 19,
has now moved out closer to the perimeter, which compounds the problem.
See my post #15 in this thread and post #16 on the thread I reference there for first order approximations on rotational inertia comparison.
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      04-28-2010, 10:10 PM   #25
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interesting, thanks
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      04-29-2010, 06:47 AM   #26
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These are fine educated statements made by persons who obviously have a lot of knowledge in this area. Nevertheless, the real world data collected by Car and Driver indicated that, comparing identical brand wheels and tires (19 vs 18), the 18 inch versions had better acceleration, better roadholding, better ride, better fuel mileage, lower total (wheel + tire) weight, and lower total cost.
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      04-29-2010, 08:26 AM   #27
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Quote:
Originally Posted by car62 View Post
These are fine educated statements made by persons who obviously have a lot of knowledge in this area. Nevertheless, the real world data collected by Car and Driver indicated that, comparing identical brand wheels and tires (19 vs 18), the 18 inch versions had better acceleration, better roadholding, better ride, better fuel mileage, lower total (wheel + tire) weight, and lower total cost.
You continue to miss the details, and make "misleading" statements in the process.

I believe this is the magazine comparison you are referring to?

http://www.caranddriver.com/features...sted-tech_dept

Let's look at the details:

1. They are comparing 18"x8.0" rims with 19"x8.5" which have 225/40/18 and 235/35/19 tires on them. So this is an apples to oranges comparison. The 19" rim and tires are wider, which is most likely where the 3 lb weight difference in the total weight is coming from.

2. I already referenced some specific 18" vs 19" setup that weigh pretty much the same at the same rim model, tire model, rim width, tire width, and rolling diameter. (I am not claiming that is the case for all rim brands as in some case manufacturers increase the loading specs on the 19" rims as they are more likely to be used on a heavier car).

3. Despite the apples to oranges comparison, the C&D data show no difference in acceleration figures between the 18" and 19" setups they test. 0-60 in 7.9s, and 1/4 mile 16.1s @ 86 mph for both setups. The only minor difference is in the 0-100mph, which is 23.3s vs 23.4s. That's just noise.

#3 above supports what I've been saying all along (despite the apples to oranges comparison).

I never made any claims about ride quality, handling or cost.
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      04-29-2010, 05:19 PM   #28
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Quote:
Originally Posted by Graham M View Post
Sweet, nice to see a fellow Calgary Z4 enthusiast. You'll definitely have to come out to a meet/cruise this spring or summer. I can't wait to see your car!
It will be awesome to hang out the the right crowd in Calgary... the Z4 crowd
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      04-29-2010, 05:21 PM   #29
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Quote:
Originally Posted by lucid View Post
You continue to miss the details, and make "misleading" statements in the process.

I believe this is the magazine comparison you are referring to?

http://www.caranddriver.com/features...sted-tech_dept

Let's look at the details:

1. They are comparing 18"x8.0" rims with 19"x8.5" which have 225/40/18 and 235/35/19 tires on them. So this is an apples to oranges comparison. The 19" rim and tires are wider, which is most likely where the 3 lb weight difference in the total weight is coming from.

2. I already referenced some specific 18" vs 19" setup that weigh pretty much the same at the same rim model, tire model, rim width, tire width, and rolling diameter. (I am not claiming that is the case for all rim brands as in some case manufacturers increase the loading specs on the 19" rims as they are more likely to be used on a heavier car).

3. Despite the apples to oranges comparison, the C&D data show no difference in acceleration figures between the 18" and 19" setups they test. 0-60 in 7.9s, and 1/4 mile 16.1s @ 86 mph for both setups. The only minor difference is in the 0-100mph, which is 23.3s vs 23.4s. That's just noise.

#3 above supports what I've been saying all along (despite the apples to oranges comparison).

I never made any claims about ride quality, handling or cost.

But I guess If I get rid off the Run Flats I might save some weight on the tire no? I assume that Run Flats are heavier just becasue the type of tire...
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      04-30-2010, 01:49 PM   #30
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Quote:
Originally Posted by Panchio View Post
thanks for all the info guys! Once the car is ready, I will post the pictures....
Congrats on the Forgestars!

You've been a great customer and please let us know if there is anything else we can assist you with.

Oh....and I'm subscribing for the pictures as well!
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      04-30-2010, 01:50 PM   #31
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Quote:
Originally Posted by Panchio View Post
But I guess If I get rid off the Run Flats I might save some weight on the tire no? I assume that Run Flats are heavier just becasue the type of tire...
Run Flats are heavier, ride worse than standard tires, and they're double the price.

Stay away from those and stay with Hankook tires that you had chosen. Your ride will feel much more planted and compliant.
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      04-30-2010, 06:27 PM   #32
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let's see some pics!
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      05-01-2010, 06:17 PM   #33
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The car is in the shop right now getting fixed because some stupid drunk chic did hit my car on the front fender.... Long story short, the car will be ready this coming week and I did ask the body shop to make it look like Show room again. Then the wheels will get installed next week too .... Honestly I can't wait... In the mean time I'm driving the 135i and the same set of rims (18" though) will on on it this Monday.... I can't waaaait!!!
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      05-01-2010, 06:19 PM   #34
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Quote:
Originally Posted by **********s II View Post
Run Flats are heavier, ride worse than standard tires, and they're double the price.

Stay away from those and stay with Hankook tires that you had chosen. Your ride will feel much more planted and compliant.

Eddie!!!! Thanks for all your help bud! Awesome service!
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      05-03-2010, 10:46 AM   #35
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Quote:
Originally Posted by Panchio View Post
The car is in the shop right now getting fixed because some stupid drunk chic did hit my car on the front fender.... Long story short, the car will be ready this coming week and I did ask the body shop to make it look like Show room again. Then the wheels will get installed next week too .... Honestly I can't wait... In the mean time I'm driving the 135i and the same set of rims (18" though) will on on it this Monday.... I can't waaaait!!!
Ouch! I didn't know your Z4M was in the shop because of THAT.

She'll be back on the road in no time. Thank you sir for being an excellent customer and thank you for your patience on these wheels as well. They're going to look amazing on your car!
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      07-23-2010, 06:04 PM   #36
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This is a bad pictures that I took with my Blackberry. I will take some good pictures this weekend and post the quality ones.
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Z4 M coupe with Super Sprint exhaust and X pipe, RPI Scoop, AFE air intake, ESS tune, DINAN 4.10 Limited Slip Differential, OEM CF spoiler.
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1M Coupe... Loving it
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      07-23-2010, 07:29 PM   #37
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Quote:
Originally Posted by Panchio View Post
This is a bad pictures that I took with my Blackberry. I will take some good pictures this weekend and post the quality ones.
OMG!!!! It's like Batman's ride - The BATMOBILE!!!

Piano Black was the perfect color! The car looks amazing.

Quick question? Is it lowered or is it on OEM springs? I can't tell from the picture.
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      07-24-2010, 09:46 AM   #38
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Hey Eddy, I love the combination man.... My son calls it the Bat-mobile LOL. Right now I have the OEM suspension but I will be lowering it soon. I think I'll be getting KW, what do you think?

I'll take more pictures tonight and post them
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      07-26-2010, 12:17 AM   #39
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Quote:
Originally Posted by Panchio View Post
Hey Eddy, I love the combination man.... My son calls it the Bat-mobile LOL. Right now I have the OEM suspension but I will be lowering it soon. I think I'll be getting KW, what do you think?

I'll take more pictures tonight and post them

I think a set of KW Variant coilovers will fit the bill nicely.
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      08-16-2010, 01:04 AM   #40
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More Pictures

More Pictures with my Blackberry
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Z4 M coupe with Super Sprint exhaust and X pipe, RPI Scoop, AFE air intake, ESS tune, DINAN 4.10 Limited Slip Differential, OEM CF spoiler.
M3 E92 Coupe with DCT, Akrapovic Evolution exhaust, ESS tune, DINAN 3.62 Limited Slip Differential, OEM CF performance parts.
1M Coupe... Loving it
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      08-16-2010, 01:08 AM   #41
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and the baby brother

Sorry I know this is not a 135i thread but I thought I share it too
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Z4 M coupe with Super Sprint exhaust and X pipe, RPI Scoop, AFE air intake, ESS tune, DINAN 4.10 Limited Slip Differential, OEM CF spoiler.
M3 E92 Coupe with DCT, Akrapovic Evolution exhaust, ESS tune, DINAN 3.62 Limited Slip Differential, OEM CF performance parts.
1M Coupe... Loving it
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      08-16-2010, 11:13 AM   #42
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The cars both look great!
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      08-17-2010, 11:21 AM   #43
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That's hilarious. I bet half the people who have seen my black Z with black wheels have called it the batmobile!
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      08-19-2010, 12:03 PM   #44
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Me like very much, great job Batman. You ever do the KW's with Eddie?
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