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BMW 5-Series (G30) Forum 2017+ BMW 5 Series (G30) General Discussions First Video of a 2018 BMW M550ix in the 1/4 - 12.3@115 MPH

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      07-18-2017, 06:54 AM   #45
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Quote:
Originally Posted by Tengocity View Post
Ever heard of sarcasm?

Don't take yourself so seriously!

But you still haven't explained how 0.4 seconds is a massive difference when it suits you but somehow going to be the difference between the same car depending on the weather!

And your trap speed is even worse given a 0-60mph time of less than 4 seconds.
Lol...Where to begin?
If you had any experience whatsoever - I wouldn't have to explain ANY of the questions you've asked.

Like what a difference 12.7 at 111 is to a 12.3 at 115 car, OR the similarities of two cars running 12.1 and 12.3 at the same MPH.

Or your incredulous notion weather could increase a run by tenths and even gain you (in this case) 1-3 MPH. Lol.

And my trap speed is worse because my 0-60 is sub 4 seconds?! A) trap speed and ET sand not associated that way - one is time and the other is speed.

B) I need a sense of humor and irony to read through and answer your posts.

C) Stop writing: you don't know what you are talking about. It is painfully obvious. You are outside your depth. It is making you look really silly.
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      07-18-2017, 07:07 AM   #46
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Quote:
Originally Posted by vtknight View Post
Lol...Where to begin?
If you had any experience whatsoever - I wouldn't have to explain ANY of the questions you've asked.

Like what a difference 12.7 at 111 is to a 12.3 at 115 car.

Or your incredulous notion weather could increase a run by tenths and even gain you (in this case) 1-3 MPH. Lol.

And my trap speed is worse because my 0-60 is sub 4 seconds?! A) trap speed and ET sand not associated that way - one is time and the other is speed.

B) Stop writing: you don't know what you are talking about. You are outside your depth. It is making you look really silly.
It's not my notion, somebody else suggested it and you agreed with it. I think it's pretty negligible in reality. So we are now agreed to my point all along?

But yes, given how quick that car is to 60mph, then I don't think your trap speed at the end is all that high. On the day I did my runs the RWD E90 M3's were about a second slower to 60mph than your car and taking 13 seconds or so. However their trap speeds were in the region of 120mph. If the runs had been much longer then I would have been demolished soon after.

I know enough to understand the relationship between the traction in the start phase, the real acceleration once you get going, how it effects the elapsed time, and how the trap speed gives you an indication of what a car is doing to post it's performance.

And you haven't explained anything, you've just talked like you think you know better. Maybe you do, but it isn't coming across.
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      07-18-2017, 07:30 AM   #47
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Quote:
Originally Posted by Tengocity View Post
It's not my notion, somebody else suggested it and you agreed with it. I think it's pretty negligible in reality. So we are now agreed to my point all along?

But yes, given how quick that car is to 60mph, then I don't think your trap speed at the end is all that high. On the day I did my runs the RWD E90 M3's were about a second slower to 60mph than your car and taking 13 seconds or so. However their trap speeds were in the region of 120mph. If the runs had been much longer then I would have been demolished soon after.

I know enough to understand the relationship between the traction in the start phase, the real acceleration once you get going, how it effects the elapsed time, and how the trap speed gives you an indication of what a car is doing to post it's performance.

And you haven't explained anything, you've just talked like you think you know better. Maybe you do, but it isn't coming across.
But you don't understand. Honestly. And I have explained.

You should stop now. Honestly.
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      07-18-2017, 08:36 AM   #48
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Quote:
Originally Posted by vtknight View Post
But you don't understand. Honestly. And I have explained.

You should stop now. Honestly.
I'm stopping now. But you're kidding yourself if you think you've explained anything.
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      07-18-2017, 09:55 AM   #49
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Quote:
Originally Posted by Tengocity View Post
I'm stopping now. But you're kidding yourself if you think you've explained anything.
Lol. Cool.
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      07-18-2017, 10:20 AM   #50
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This thread sucks
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      07-18-2017, 10:41 AM   #51
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Quote:
Originally Posted by Crashnbrn5 View Post
This thread sucks
Actually the thread is quite good. The first of its kind - a 1/4 mile result from a 2018 M550ix in the wild. Untouched, in the middle of hot and humid Summer, with 3/4 of a tank of gas and stock tire psi.

Mostly it's the comments from a select few people who "suck". People with near zero practical knowledge that are making comments like "this really isn't good guys" or the car "isn't as fast as it should be" or "with a good 0-60 time it's trap speed isn't that good" (my favourite).

It's a very simple thread actually.
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      07-18-2017, 10:57 AM   #52
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Quote:
Originally Posted by vtknight View Post
Actually the thread is quite good. The first of its kind - a 1/4 mile result from a 2018 M550ix in the wild. Untouched, in the middle of hot and humid Summer, with 3/4 of a tank of gas and stock tire psi.

Mostly it's the comments from a select few people who "suck". People with near zero practical knowledge that are making comments like "this really isn't good guys" or the car "isn't as fast as it should be" or "with a good 0-60 time it's trap speed isn't that good" (my favourite).

It's a very simple thread actually.
lol noted. Keep in mind I said thread, not original post my Canadian bredrin.
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      07-18-2017, 11:22 AM   #53
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Quote:
Originally Posted by Tengocity View Post
It's showing me it's quicker, still doesn't seem that much quicker. 0.4 seconds at those speeds is about 50-60 ft ahead at a very quick bit of rough maths.

So, yes it's quicker, the absolute least I'd expect, but still feels like it should be further ahead.
A car going 115mph covers 67 feet in 0.4 seconds. Since the 550 is ~16' long that's about 4 car lengths.

I'm sorry, but getting whipped by 4 car lengths on your best run ever in a tuned car is a beat down. The cars don't really belong in the same track together.

To put it in better perspective, basically for it to be competitive they would have to start the light tree when you left and the 550 would have to wait for the tree to count down turn green then go and it still might beat you.
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      07-18-2017, 11:28 AM   #54
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Quote:
Originally Posted by DaveCM5 View Post
A car going 115mph covers 67 feet in 0.4 seconds. Since the 550 is ~16' long that's about 4 car lengths.

I'm sorry, but getting whipped by 4 car lengths on your best run ever in a tuned car is a beat down. The cars don't really belong in the same track together.

To put it in better perspective, basically for it to be competitive they would have to start the light tree when you left and the 550 would have to wait for the tree to count down turn green then go and it still might beat you.
Stop bringing math into this. It's too hard to argue.
I could have stated big end - it's been known in drag racing for some time now - that each tenth is about a car - more or less so depending on your trap speed - but that would at least have brought out a ton of comments.

Look what you've done.
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      07-18-2017, 11:40 AM   #55
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Quote:
Originally Posted by DaveCM5 View Post
Quote:
Originally Posted by Tengocity View Post
It's showing me it's quicker, still doesn't seem that much quicker. 0.4 seconds at those speeds is about 50-60 ft ahead at a very quick bit of rough maths.

So, yes it's quicker, the absolute least I'd expect, but still feels like it should be further ahead.
A car going 115mph covers 67 feet in 0.4 seconds. Since the 550 is ~16' long that's about 4 car lengths.

I'm sorry, but getting whipped by 4 car lengths on your best run ever in a tuned car is a beat down. The cars don't really belong in the same track together.

To put it in better perspective, basically for it to be competitive they would have to start the light tree when you left and the 550 would have to wait for the tree to count down turn green then go and it still might beat you.
Ok so for someone who apparently knows nothing my quick bit of arithmetic wasn't far out.

Where did I say my car was as quick or anything like it?

It's a 480bhp petrol V8, with xdrive. I have a 6 pot diesel estate (albeit remapped).... you're too right they shouldn't be comparable. I would get comfortably beaten every time. This is not the point of any of my posts.

My run was a hot day with a full tank, with normal tyre pressures, no launch control, and a driver who had never been on a drag strip before. I make no claims of brilliance for me or my car. Launching an automatic xdrive is the easiest thing in the world- anyone who can drive could do it. What I do know is xdrive gets you off the line easily and brilliantly, but it does impact you with extra drive train losses that get worse the faster you go.

So my only real point is that the car gets off the line superbly but maybe doesn't make the trap speed I was expecting from 480horses.

The OP is saying that 0.4 seconds is a massive difference, and then also implying that in different weather conditions, maybe less fuel in the tank, and different tyre pressures that he's then going to know that same 0.4 seconds off...

That's rubbish and you don't need to be a drag racing expert to know that.
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      07-18-2017, 12:01 PM   #56
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So taking my car out of it I've just looked up the typical times of the E60 M5. Not directly comparable, as it may have been a little lighter, and slightly more powerful with 500bhp, though much less torque, and no xdrive.

That car is about half a second slower to 60mph than a 550i, and yet runs about 12.35 for a good 1/4 mile @118mph.

So despite that lack of traction at the start it manages to uses its power to catch back up and cross at a similar time, at a slightly higher speed. If someone has the skill to get the start right anyway...

Or I suppose the other way to look at that is your car is still bloody quick, and more likely than not you'll beat an E60 M5 at the drag strip!
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      07-18-2017, 12:55 PM   #57
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Quote:
Originally Posted by Tengocity View Post
So taking my car out of it I've just looked up the typical times of the E60 M5. Not directly comparable, as it may have been a little lighter, and slightly more powerful with 500bhp, though much less torque, and no xdrive.

That car is about half a second slower to 60mph than a 550i, and yet runs about 12.35 for a good 1/4 mile @118mph.

So despite that lack of traction at the start it manages to uses its power to catch back up and cross at a similar time, at a slightly higher speed. If someone has the skill to get the start right anyway...

Or I suppose the other way to look at that is your car is still bloody quick, and more likely than not you'll beat an E60 M5 at the drag strip!
Correct. With traction you tend to lose MPH, not gain it. In fact, when you spin you pick up MPH as you are "lengthening" the runway. I have had people beat me early on when my car was a bolt on setup with better ET and less MPH - because they were cutting much better 60' times than I was - and keeping that traction all the way to the towers, while I was spinning and effectively standing still as they make their way down the track.

The E60 M5 is the last of the "smaller" GT's and using its trap speed - I know it has a better power to weight than the M550ix. If the M5 ran a solid 60 to get that 12.35 then it would take a tire for him to do it again against me. If that ET was with spinning - then he will likely run a 12.0 with better traction, tires, weight and DA at a better MPH than the M550ix - probably around 115. The M550ix would also lose MPH in a better ET run - removing special circumstances with super cool air and correspondingly fantastic DA - but on the same day I ran the 12.36 at 115 - if the car hooked better - I would gain a tenth or two and likely lose a MPH air two in the process - as the traction means less time on the track to increase speed (thus "shortening" the track").

It's all math in the end of the day.
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      07-19-2017, 04:29 PM   #58
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Did this really turn into my chipped 335 is faster / better / etc? Sounds like every Honda forum back in the early 2000s.... JDM vs American? Different animals here.

OP... all good and well. I'm looking into a G30 or maybe a new X5 5.0... love the fact that you wrung out a new car. Don't they have break in procedures anymore?
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      07-19-2017, 04:43 PM   #59
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      07-19-2017, 11:20 PM   #60
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Quote:
Originally Posted by krautmeister View Post
Did this really turn into my chipped 335 is faster / better / etc? Sounds like every Honda forum back in the early 2000s.... JDM vs American? Different animals here.

OP... all good and well. I'm looking into a G30 or maybe a new X5 5.0... love the fact that you wrung out a new car. Don't they have break in procedures anymore?
Thanks! No, I was either the first or one of the first to take ownership of an M550 - so it is well broken in (over 4K miles).
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      07-19-2017, 11:21 PM   #61
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Impressive!
Thanks!
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      07-20-2017, 10:41 AM   #62
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Great time, your trap speed is actually higher what it should be (according to the power of math haha )

Estimated weight and HP
Vehicle weight: 4400
Dyno horsepower: 456
¼-mile ET: 12.39 seconds
¼-mile MPH: 110 MPH

ET = ((Weight ÷ HP).333) × 5.825
MPH = ((HP ÷ Weight).333) × 234
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      07-20-2017, 12:02 PM   #63
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Originally Posted by Jkenn6 View Post
Great time, your trap speed is actually higher what it should be (according to the power of math haha )

Estimated weight and HP
Vehicle weight: 4400
Dyno horsepower: 456
¼-mile ET: 12.39 seconds
¼-mile MPH: 110 MPH

ET = ((Weight ÷ HP).333) × 5.825
MPH = ((HP ÷ Weight).333) × 234
It's not often I can beat math - but I will take it lol.

To some of the PM's - yes - I am going to back to the track in the Fall with the nice cool air, with less than a 1/4 tank and lowered tire pressure to see what it can really do.

My guess is 12.0-12.1 best ET at 117 MPH - best trap. Average 12.1 at 114-115 MPH.
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      07-20-2017, 12:43 PM   #64
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Quote:
Originally Posted by Jkenn6 View Post
Great time, your trap speed is actually higher what it should be (according to the power of math haha )

Estimated weight and HP
Vehicle weight: 4400
Dyno horsepower: 456
¼-mile ET: 12.39 seconds
¼-mile MPH: 110 MPH

ET = ((Weight ÷ HP).333) × 5.825
MPH = ((HP ÷ Weight).333) × 234
In all seriousness - math is never wrong - and the issue is the power outputs are inaccurate. I believe there was a dyno video with the M550ix where the WHP conversion was higher than advertised by BMW.
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      07-20-2017, 03:10 PM   #65
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Pretty good #s
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      07-20-2017, 10:48 PM   #66
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Pretty good #s
Thanks
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