Just for Fun: Is the Step Still King in the Realm of the
07-18-2006, 07:05 AM
#71
Contributors
Join Date: Jan 2005
Location: San Jose, California, USA
Posts: 4,119
Likes: 0
Received 0 Likes
on
0 Posts
My Ride: 2008 Porsche 911 Carrera S Convertible. Midnight Blue, 6 Speed.Retired - 2007 997 Carrera S, Midnight Blue, Grey leather, premium audioRetired - 2007 550i, Monaco Blue over Beige, Navigation, Logic 7, Cold Weather Pack, Comfort Access, Sport Package
Model Year: 2008
Originally Posted by doug_999' post='312062' date='Jul 17 2006, 08:45 PM
Last month's issue I believe
http://www.roadandtrack.com/article.asp?se...article_id=3638
http://www.clublexus.com/forums/showthread...;highlight=550i
http://www.roadandtrack.com/article.asp?se...article_id=3638
http://www.clublexus.com/forums/showthread...;highlight=550i
07-18-2006, 07:13 AM
#72
Contributors
Thread Starter
Join Date: Aug 2005
Location: Austin TX
Posts: 6,554
Likes: 0
Received 0 Likes
on
0 Posts
My Ride: 2014 X5 xDrive 5.0 M Package Carbon Black Metallic/2008 M Roadster Imola Red
Originally Posted by EBMCS03' post='312018' date='Jul 17 2006, 08:55 PM
Like you said... the Cayman looks sooooooooo good! And Honestly... I think it drives better. I've driven M3, E39 M5 and the Cayman is better. a porsche is a porsche... :'(
07-18-2006, 07:16 AM
#73
Contributors
Thread Starter
Join Date: Aug 2005
Location: Austin TX
Posts: 6,554
Likes: 0
Received 0 Likes
on
0 Posts
My Ride: 2014 X5 xDrive 5.0 M Package Carbon Black Metallic/2008 M Roadster Imola Red
Originally Posted by realtyman' post='312022' date='Jul 17 2006, 09:01 PM
No trouble getting it to do what I want. Also, no trouble getting it to do what I "don't" want (like light up the right rear only by using AA). Although I will most likely get an SMG (or equivalent) again the 2 issues I have with the 545i is the lack of a limited slip diff (yeah, I know, it's not the transmission. But it is "the car" and at least in my case, it renders Accelleration Assist all but useless) and the inability to modulate the clutch on take-off (yes, it's the nature of the beast, I guess).
In the case of my previous post, it was an oddity that I was able to get one part of the AA program (the desired part - the "speed shift" that you will only get by using AA (or buying an "M")) without having to go through the undesired part of the AA program (the right rear only wheel spin). So as I said - If I can only figure out how to do that again.
In the case of my previous post, it was an oddity that I was able to get one part of the AA program (the desired part - the "speed shift" that you will only get by using AA (or buying an "M")) without having to go through the undesired part of the AA program (the right rear only wheel spin). So as I said - If I can only figure out how to do that again.
07-18-2006, 07:19 AM
#74
Contributors
Thread Starter
Join Date: Aug 2005
Location: Austin TX
Posts: 6,554
Likes: 0
Received 0 Likes
on
0 Posts
My Ride: 2014 X5 xDrive 5.0 M Package Carbon Black Metallic/2008 M Roadster Imola Red
Originally Posted by doug_999' post='312062' date='Jul 17 2006, 10:45 PM
Last month's issue I believe
http://www.roadandtrack.com/article.asp?se...article_id=3638
http://www.clublexus.com/forums/showthread...;highlight=550i
http://www.roadandtrack.com/article.asp?se...article_id=3638
http://www.clublexus.com/forums/showthread...;highlight=550i
07-18-2006, 07:33 AM
#75
Contributors
Thread Starter
Join Date: Aug 2005
Location: Austin TX
Posts: 6,554
Likes: 0
Received 0 Likes
on
0 Posts
My Ride: 2014 X5 xDrive 5.0 M Package Carbon Black Metallic/2008 M Roadster Imola Red
Originally Posted by Znod' post='311998' date='Jul 17 2006, 08:29 PM
Give me some time later on so I can present my calculations for ET for both cars. The beautiful of this exercise is that all variables are constant except for lbs and HP; otherwise, I'd have to write a technical issue and everyone would be turned off.
Well, there are lots of ET and MPH calculators online that only consider basic differences such as weight, HP, etc. It will be interesting to see what your calculations look like. Your results can then be compared to what the online calculators give. And, anyone that doesn't want to read what someone else writes if free to ignore it. Happy formulating and calculating.
Well, there are lots of ET and MPH calculators online that only consider basic differences such as weight, HP, etc. It will be interesting to see what your calculations look like. Your results can then be compared to what the online calculators give. And, anyone that doesn't want to read what someone else writes if free to ignore it. Happy formulating and calculating.
"If you know the weight of your car (with you in it) and know the peak wheel HP as measured by a chassis dyno this calculation will estimate the trap speed in MPH and the Elapsed Time (ET) in the quarter mile."
You Entered (for 550i):
Vehicle Weight - 4000 (lbs) (est)
Wheel HP - 297 (HP) (est--.825 X 360)
Results:
Trap Speed - 102.55 (mph @ end of 1/4 mi.)
E.T. - 13.85 (seconds @ end of 1/4 mi.)
You Entered (for 545i):
Vehicle Weight - 4000 (lbs) (est)
Wheel HP - 268 (HP) (est--.825 X 325)
Results:
Trap Speed - 99.1 (mph @ end of 1/4 mi.)
E.T. - 14.33 (seconds @ end of 1/4 mi.)
Even though overall results are too slow, the differences given for the two cars are a .48 ET advantage to the 550i and a 3.45 MPH advantage to the 550i. Note that 3.45 is pretty close to the pertinent values I inferred using the Cayman/M Roadster example--3.83 and 2.91.
07-18-2006, 10:03 AM
#76
Contributors
Join Date: Aug 2005
Location: Houston, Texas
Posts: 2,114
Likes: 0
Received 0 Likes
on
0 Posts
My Ride: 2005 BMW 545i, Silver Grey, Sport Package, R. Shades, Cold Pkg, Sat. Rad., Prem. Sound.
Originally Posted by Znod' post='312177' date='Jul 18 2006, 10:33 AM
Here are the results one very crude calculator gives--550i first.
"If you know the weight of your car (with you in it) and know the peak wheel HP as measured by a chassis dyno this calculation will estimate the trap speed in MPH and the Elapsed Time (ET) in the quarter mile."
You Entered (for 550i):
Vehicle Weight - 4000 (lbs) (est)
Wheel HP - 297 (HP) (est--.825 X 360)
Results:
Trap Speed - 102.55 (mph @ end of 1/4 mi.)
E.T. - 13.85 (seconds @ end of 1/4 mi.)
You Entered (for 545i):
Vehicle Weight - 4000 (lbs) (est)
Wheel HP - 268 (HP) (est--.825 X 325)
Results:
Trap Speed - 99.1 (mph @ end of 1/4 mi.)
E.T. - 14.33 (seconds @ end of 1/4 mi.)
Even though overall results are too slow, the differences given for the two cars are a .48 ET advantage to the 550i and a 3.45 MPH advantage to the 550i. Note that 3.45 is pretty close to the pertinent values I inferred using the Cayman/M Roadster example--3.83 and 2.91.
"If you know the weight of your car (with you in it) and know the peak wheel HP as measured by a chassis dyno this calculation will estimate the trap speed in MPH and the Elapsed Time (ET) in the quarter mile."
You Entered (for 550i):
Vehicle Weight - 4000 (lbs) (est)
Wheel HP - 297 (HP) (est--.825 X 360)
Results:
Trap Speed - 102.55 (mph @ end of 1/4 mi.)
E.T. - 13.85 (seconds @ end of 1/4 mi.)
You Entered (for 545i):
Vehicle Weight - 4000 (lbs) (est)
Wheel HP - 268 (HP) (est--.825 X 325)
Results:
Trap Speed - 99.1 (mph @ end of 1/4 mi.)
E.T. - 14.33 (seconds @ end of 1/4 mi.)
Even though overall results are too slow, the differences given for the two cars are a .48 ET advantage to the 550i and a 3.45 MPH advantage to the 550i. Note that 3.45 is pretty close to the pertinent values I inferred using the Cayman/M Roadster example--3.83 and 2.91.
To get everyone back into the this conversation, I've created an Excel spreadsheet that essentially does everything the Internet calculators do but much more and easier for the average Joe to participate in this discussion. Everyone, download the attached Excel spreadsheet and have fun. Remember, it does not take into consideration such as environmental conditions, gearing, tire size, etc. Make sure to RENAME the extension from .MOV to .XLS
Performance_Calc.mov
Now, back to Znod's thread . . . I agree that there is not a "significant" performance difference based on empirical data (your test and auto mags' test) to 0-60 mph or 1/4. The calculators also confirm. However, the 3.45 mph advantage of the 550i over the 545i is quite significant at the track/drag and is a clear indication of a win/lose. On the street, I don't know . . . for every 1 second thereafter, the 550i is traveling 5 feet more than the 545i.
As I mentioned earlier, the 550i will have a significant advantage over the 545i starting in the triple digit speed or little sooner.
With regards to mathematically violation, you did a "New Jersey" on me. You made a left to turn right. So, after a second glance, you didn't violate mathematical laws.
You just expressed it differently.
07-18-2006, 11:55 AM
#77
Contributors
Thread Starter
Join Date: Aug 2005
Location: Austin TX
Posts: 6,554
Likes: 0
Received 0 Likes
on
0 Posts
My Ride: 2014 X5 xDrive 5.0 M Package Carbon Black Metallic/2008 M Roadster Imola Red
Originally Posted by Bimmer32' post='312213' date='Jul 18 2006, 01:03 PM
Rightly so, there are many Internet calculators to use, but they have their shortcomings and are a bit off, like you say.
To get everyone back into the this conversation, I've created an Excel spreadsheet that essentially does everything the Internet calculators do but much more and easier for the average Joe to participate in this discussion. Everyone, download the attached Excel spreadsheet and have fun. Remember, it does not take into consideration such as environmental conditions, gearing, tire size, etc. Make sure to RENAME the extension from .MOV to .XLS
Attachment 21806
Now, back to Znod's thread . . . I agree that there is not a "significant" performance difference based on empirical data (your test and auto mags' test) to 0-60 mph or 1/4. The calculators also confirm. However, the 3.45 mph advantage of the 550i over the 545i is quite significant at the track/drag and is a clear indication of a win/lose. On the street, I don't know . . . for every 1 second thereafter, the 550i is traveling 5 feet more than the 545i.
As I mentioned earlier, the 550i will have a significant advantage over the 545i starting in the triple digit speed or little sooner.
With regards to mathematically violation, you did a "New Jersey" on me. You made a left to turn right. So, after a second glance, you didn't violate mathematical laws. You just expressed it differently.
To get everyone back into the this conversation, I've created an Excel spreadsheet that essentially does everything the Internet calculators do but much more and easier for the average Joe to participate in this discussion. Everyone, download the attached Excel spreadsheet and have fun. Remember, it does not take into consideration such as environmental conditions, gearing, tire size, etc. Make sure to RENAME the extension from .MOV to .XLS
Attachment 21806
Now, back to Znod's thread . . . I agree that there is not a "significant" performance difference based on empirical data (your test and auto mags' test) to 0-60 mph or 1/4. The calculators also confirm. However, the 3.45 mph advantage of the 550i over the 545i is quite significant at the track/drag and is a clear indication of a win/lose. On the street, I don't know . . . for every 1 second thereafter, the 550i is traveling 5 feet more than the 545i.
As I mentioned earlier, the 550i will have a significant advantage over the 545i starting in the triple digit speed or little sooner.
With regards to mathematically violation, you did a "New Jersey" on me. You made a left to turn right. So, after a second glance, you didn't violate mathematical laws.
You just expressed it differently.
07-18-2006, 11:56 AM
#78
Senior Members
Join Date: Nov 2005
Location: Chicago, IL
Posts: 724
Likes: 0
Received 0 Likes
on
0 Posts
My Ride: 2008 Sapphire Black on Black M5 - loaded sans soft close doors
Originally Posted by swajames' post='312167' date='Jul 18 2006, 10:05 AM
I took a look at the clublexus link you posted Doug and thought that was an excellent discussion - some really good and honest debate about the strengths and weaknesses of each car (and a lot of respect for BMW from the Lexus owners). Kudos to the clublexus guys as threads like that on some other forums will nearly always end up in flames....
For the most part, they are a very mature bunch (except for the usual zealots that exist on all boards - including here)
. Still from a maturity standpoint, I still find this board to be the best. This thread is a perfect example - not all of us agree and yet there is no name calling and the mods do not have to step in. Kudos to everyone here.
07-18-2006, 12:00 PM
#79
Contributors
Thread Starter
Join Date: Aug 2005
Location: Austin TX
Posts: 6,554
Likes: 0
Received 0 Likes
on
0 Posts
My Ride: 2014 X5 xDrive 5.0 M Package Carbon Black Metallic/2008 M Roadster Imola Red
Originally Posted by Znod' post='312288' date='Jul 18 2006, 02:55 PM
I'll check out your calculator. Should be fun.
07-18-2006, 12:49 PM
#80
Contributors
Join Date: Oct 2004
Location: So Cal, USA
Posts: 14,776
Likes: 0
Received 0 Likes
on
0 Posts
My Ride: 545iSMGSilver GrayAuburn Dakota LeatherLogic 7 Premium SoundSports Package
Originally Posted by doug_999' post='312289' date='Jul 18 2006, 12:56 PM
The fact that their board software remembers the threads you have posted to and will give you an update automatically when one of the threads you have posted to is updated is so nice.
Uhhhh same thing for this board... did you check you settings?