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      02-23-2014, 12:46 PM   #1
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My 435xi Msport quarter mile drag strip times

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I had been looking for some official 1/4 mile times on the car and I just haven't seen anything reliable. I went today to see what the car would do with me driving it.

Car has 3100 miles and is an 8 speed auto. I had never used or tried launch control so I only got it to work on my last of 4 runs. It was my best time but barely. I didn't give it any more runs to learn the track so maybe it would have gone slightly faster I don't know.

1st run (not showing slip in photo)
13.5
2nd run
13.33
3rd run
13.39@104
4th run
13.33@104 (only run using launch control)

Was about 58 degrees out on my last and fastest run. Only ran 4 times and was consistent enough I didn't think it would get much faster.

Basically all were at 104 mph or just hundredths of a mph below.

Even when the launch control wasn't activating I was power braking so seemed to have pretty much same effect.

I actually cut my best 60ft without launch control but best ET was with Launch control on the last run.


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      02-23-2014, 01:25 PM   #2
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for an all-wheel drive vehicle you'd think the 60' would be better.
Still 13.3 for a stock car, respectable. Great job
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      02-23-2014, 01:32 PM   #3
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Nice. I always like to see these.

One day I'll get out there and run mine. Seems fun if not a bit intimidating first time out.
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      02-23-2014, 01:54 PM   #4
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13.3@104 is very promising. You're completely stock, right?
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      02-23-2014, 01:58 PM   #5
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Quote:
Originally Posted by auf Deutsche View Post
13.3@104 is very promising. You're completely stock, right?
Yes bone stock, its my wife's car actually.
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      02-23-2014, 02:05 PM   #6
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I think another tenth off your 60ft is not out of the question which would give you a 13.15-13.2@104+

PPK alone would have you then in the 12's!
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      02-23-2014, 02:15 PM   #7
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Quote:
Originally Posted by Jamesons Viggen View Post
I think another tenth off your 60ft is not out of the question which would give you a 13.15-13.2@104+

PPK alone would have you then in the 12's!
I was thinking it is probably capable of it if launch control would actually launch it harder. I have spent 4 hours at the track and saw what it was running so I didn't expect a lot more.
It's a good baseline for people, there is so little documented 1/4 runs of the 435xi I figured it would help out the community at large and satisfy my own curiosity.

I read Motor Trends long term test of the 435xi with the JB4 is running 12.8x with nothing other then the JB4.

Does seem the potential is there. Once they sort out the electronic waste gate issues. Should be an ass hauling coupe with simply the JB4.
Seems crazy that these large cars run these times right out of the box already.
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      02-23-2014, 02:21 PM   #8
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Quote:
Originally Posted by Mik3ymomo View Post
I was thinking it is probably capable of it if launch control would actually launch it harder. I have spent 4 hours at the track and saw what it was running so I didn't expect a lot more.
It's a good baseline for people, there is so little documented 1/4 runs of the 435xi I figured it would help out the community at large and satisfy my own curiosity.

I read Motor Trends long term test of the 435xi with the JB4 is running 12.8x with nothing other then the JB4.

Does seem the potential is there. Once they sort out the electronic waste gate issues. Should be an ass hauling coupe with simply the JB4.
Seems crazy that these large cars run these times right out of the box already.
Do you have the link to that article?
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      02-23-2014, 02:29 PM   #9
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How was your traction out of the box? Last time I was at Atco there was no way to bypass the waterbox?
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      02-23-2014, 02:36 PM   #10
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Quote:
Originally Posted by EJL View Post
How was your traction out of the box? Last time I was at Atco there was no way to bypass the waterbox?
I drove around it best I could. I might have slightly touched it but I didn't spin the tires leaving. AWD is cool that way.
It slightly spun rear tires my first run when track was still cold but the center diff must have locked up cause it only lasted for a split second.

Rest of runs I used left lane and no spin at all.
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      02-23-2014, 02:40 PM   #11
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Quote:
Originally Posted by Mik3ymomo View Post
I drove around it best I could. I might have slightly touched it but I didn't spin the tires leaving. AWD is cool that way.
It slightly spun rear tires my first run when track was still cold but the center diff must have locked up cause it only lasted for a split second.

Rest of runs I used left lane and no spin at all.
What setting did you run in (sport+, traction all off! etc.)?
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      02-23-2014, 02:50 PM   #12
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Quote:
Originally Posted by tdizzle View Post
What setting did you run in (sport+, traction all off! etc.)?
All runs is Sport + with shifter pulled to M/S. I still let it shift itself.
All runs power brake trying to get it into launch mode but it only actually gave me the checkered flag on the last run.
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      02-23-2014, 03:04 PM   #13
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Quote:
Originally Posted by chetman7 View Post
Do you have the link to that article?
+1 That's the first I've heard of that.
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      02-23-2014, 03:25 PM   #14
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What kind if tires do you have?
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      02-23-2014, 03:30 PM   #15
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Wait so the launch control run you did was the one you jumped? Interesting that LC was actually slower
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      02-23-2014, 03:32 PM   #16
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What was the density altitude where you were at? You should be able to check a history online. Plays a huge role, easily could add/subtract .5 sec in the et. Probably the only benefit of all this ungodly cold weather lol...

Also curious about tires. Looks like you were running pretty consistent times!
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      02-23-2014, 03:41 PM   #17
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Quote:
Originally Posted by Steve33 View Post
Wait so the launch control run you did was the one you jumped? Interesting that LC was actually slower
Same thing has been observed on the S4 DCT. To me, LC seems more useful on a RWD car, since you aren't really traction limited on the AWD launch. It's even the case that LC is slower for GIAC tuned S4's (the DSG TCU flash), which has raised launch control to 4k RPM.

It's quite possible the ECU is somehow limiting engine torque in light of using LC. No one here has really convinced me that launch control is even needed for an autobox, since you can just brake torque it for even more torque than you'd normally have at a given engine load. Not to mention the turbo is tuned pretty well for low RPM's (also VANOS on the exhaust cams), so it should be pretty hard to bog down the N55. I.e. you don't need to launch the N55 at 5k RPM to avoid lag like you might with some other engines.

Last edited by drob23; 02-23-2014 at 03:52 PM..
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      02-23-2014, 03:44 PM   #18
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Quote:
Originally Posted by drob23 View Post
What was the density altitude where you were at? You should be able to check a history online. Plays a huge role, easily could add/subtract .5 sec in the et. Probably the only benefit of all this ungodly cold weather lol...

Also curious about tires. Looks like you were running pretty consistent times!
In Atco it was about 30-45% humidity, 29.9 inches holding steady, about 58 degrees F, and I don't know the raceway's exact height, but that area is about 75 feet above sea level.
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      02-23-2014, 03:46 PM   #19
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Quote:
Originally Posted by drob23 View Post
Not to mention one of the turbos in the twin scroll is tuned pretty well for low RPM's (also VANOS on the exhaust cams), so it should be pretty hard to bog down the N55.
The N55 has only one twin scroll turbo. Twin scroll means the exhaust gases are separated, but there is still one turbo.
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      02-23-2014, 03:50 PM   #20
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Quote:
Originally Posted by EJL
Quote:
Originally Posted by drob23 View Post
What was the density altitude where you were at? You should be able to check a history online. Plays a huge role, easily could add/subtract .5 sec in the et. Probably the only benefit of all this ungodly cold weather lol...

Also curious about tires. Looks like you were running pretty consistent times!
In Atco it was about 30-45% humidity, 29.9 inches holding steady, about 58 degrees F, and I don't know the raceway's exact height, but that area is about 75 feet above sea level.
Both of us are keen to know the type if tires you have on the 4er
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      02-23-2014, 03:51 PM   #21
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Quote:
Originally Posted by EJL View Post
The N55 has only one twin scroll turbo. Twin scroll means the exhaust gases are separated, but there is still one turbo.
Ah, I see, my fault (I guess if it had 2 turbos it would be twin turbo lol).

For the DA - go check this chart - http://airdensityonline.com/trackFor...9.795604350248

Edit - ugh bad link above (it's a prediction, not history), for DA check out dragtimes.com calculator here (have to turn off ad-block)
http://www.dragtimes.com/da-density-...4&time=2:54 PM

It fluctuates a lot, but judging from what you've said, you had pretty favorable conditions so I'd guess your time might nearly be a "lower bound" for stock 435ix 1/4 mile et's.
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      02-23-2014, 03:58 PM   #22
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Quote:
Originally Posted by drob23 View Post

It fluctuates a lot, but judging from what you've said, you had pretty favorable conditions so I'd guess your time might nearly be a "lower bound" for stock 435ix 1/4 mile et's.
I wasn't the one at the track. I just live nearby. Looks like the OP's numbers are a pretty good gauge since todays conditions were relatively ideal.
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