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      02-24-2014, 09:00 AM   #45
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Originally Posted by drob23
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Originally Posted by ToyotaBMW View Post
In these photos it looks like the radiator down in the air dam can be easily hit by rocks. It looks like nothing is really protecting that radiator. May want to look at installing some mesh so that you won't get a rock causing a punctured radiator.
I don't think BMW makes their heat exchangers out of paper mache like the "other" guy you are alluding to. Never read of any problems here.

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Hey man, just taking things at face value here

It's ok to get into the details but given what we know the guy beat C&D. (For example do you know the DA when C&D tested their car, btw their car weighed about 200lbs less than his) I will give him that credit, he beat them and now it's up to us ( and him) to beat him.

FYI xdrive is a 60:40 split so for straight line stuff the additional grip offered by the rear wheels in the staggered summer tires setup should help.
Most of the magazines don't run their cars in extreme cold (they are trying to emulate real world conditions). Even OEM's move their testing and calibration engineers to the southwest during winter. A lot of the magazines do testing either in So Cal or Michigan, where in the summer it can be either really hot or the humidity can be bad (in midwest, not CA ). Humidity is probably the worst killer of DA other than altitude itself. The conditions this guy ran were pretty damn good.

The staggered setup won't help if he isn't even getting wheel spin with square all-season setup. There is no torque/power that he's leaving on the table, unless I am missing something. The torque split on xdrive can vary for launch (it's def not fixed like a mechanical center diff). The biggest helper would probably be light weight wheels, rotors, calipers etc.

Most drag guys are dealing with serious wheel spin (high HP rear wheel drive cars), which is why they put the huge wide tires on the rear. There are some tricks like letting out air (maybe to 20 PSI) to get a slightly larger contact patch and a little more torsional flex at the launch, check out this

Correct xdrive is not fixed. Now given that we know xdrive gets better times than rwd it quite likely that all power is sent to the rear wheel post launch in a drag strip 1/4 mile run. It's a theory at this stage but I don't see why this would not be the way xdrive functions under WOT with the steering wheel in a fixed position.

I agree, we can choose to get scientific on this but consider C&D is in Michigan, MT is in CA. Both on different days and possibly times and possibly different weather conditions tested the 335i at 4.6/4.7 and 13.3 (105/103) at the quarter. Our friend here came in at 4.56 and 13.33@104 at the quarter in NJ.

I don't know about you but I am really not worried about different conditions for the quarter mile times especially if the goal is to achieve the best times.
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      02-24-2014, 09:11 AM   #46
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Hey OP at which RPM were you launching ?
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      02-24-2014, 09:22 AM   #47
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Auditude from the S4 boards also ran that day, and took video, is this your car LOL - link to his post along with his mods and slips http://www.audizine.com/forum/showth...nd-6MT-content

Yeah, I tried to cut the best light I could to get an edge on him and blew the light lol. Nice find. Thanks for posting the confirmation. That was my last run and the only run I got it to go into launch mode.
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      02-24-2014, 09:50 AM   #48
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Yeah, I tried to cut the best light I could to get an edge on him and blew the light lol. Nice find. Thanks for posting the confirmation. That was my last run and the only run I got it to go into launch mode.
Ha funny, yea I can see you trying to figure out the launch control. You sure you had it right? Looks like the car is kinda inching forward. Don't you need to fully depress the brakes while it brings up and holds the revs for LC? I think the E9x M3 DSG LC is different (you don't press brakes).

BTW - that S4 ran the second fastest time in the world (11.62@118.64), so don't feel bad (looks like you have some faster horses in the stable anyways ).
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      02-24-2014, 10:29 AM   #49
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Ha funny, yea I can see you trying to figure out the launch control. You sure you had it right? Looks like the car is kinda inching forward. Don't you need to fully depress the brakes while it brings up and holds the revs for LC? I think the E9x M3 DSG LC is different (you don't press brakes).

BTW - that S4 ran the second fastest time in the world (11.62@118.64), so don't feel bad (looks like you have some faster horses in the stable anyways ).
Lol, I don't feel bad at all. I wonder if he did the DA correction on his time and actually broke the record. You should figure it out for him. I am sure he would appreciate it.
It was -.311 for that run.
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      02-24-2014, 10:56 AM   #50
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Lol, I don't feel bad at all. I wonder if he did the DA correction on his time and actually broke the record. You should figure it out for him. I am sure he would appreciate it.
It was -.311 for that run.
I don't believe they want to do corrections, kinda like people claiming output on dyno's...just sort of too bench racing lol

Besides, isn't a negative DA better than standard conditions? I.e. any correction would place you in the opposite direction? I don't know much about STP or whatever the equiv statement is for drag racing.
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      02-24-2014, 11:06 AM   #51
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      02-24-2014, 04:43 PM   #52
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It's a bit disappointing to see the same low 13s quarter mile times for the 335i for the last 8 years.
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      02-24-2014, 04:56 PM   #53
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It's a bit disappointing to see the same low 13s quarter mile times for the 335i for the last 8 years.
Shouldn't really be that surprising, power output hasn't changed at all over the last 8 years.

Not like it really needs to. "It needs more power" was never really a criticism levied against the N54 and N55 engine.

The competition hasn't done much to play catch up/out perform the engine, so BMW doesn't really have much incentive to make upgrades. I suspect that will change once the B9 S4 and C400 go on sale.
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      02-24-2014, 04:58 PM   #54
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Nice to see these times compared with a 335i/xi.
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      02-24-2014, 05:02 PM   #55
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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?
Absolutely no way to bypass the water. I tracked my 135i there MULTIPLE tims and i always had to light the tires up exiting the waterbox to get the water off the tires.
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      02-24-2014, 05:21 PM   #56
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We're really that concerned about the 1/4 mi time in a luxury coupe?
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      02-24-2014, 05:30 PM   #57
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Quote:
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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?
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.
Xdrive has locking center diff?

The x6 doesnt even have locking diffs. No?
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      02-24-2014, 05:41 PM   #58
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We're really that concerned about the 1/4 mi time in a luxury coupe?
Yes.

Not sure the 3 series should actually qualify as 'luxury' but that's neither here nor there. But given the amount of N54s out there that are highly modified, this platform has quite the following (yes this is N55 but same idea) of people who increase the power and take it to the drag strip amazingly enough.

It is considered a 'sport sedan' so probably a given. Crazy to see 335's and 135s with the N54 engine running roll races against Lambo's, Ferraris, GTRs, etc, and doing quite well. I think the BMS folks have 135 and 335s that are pushing north of 500whp. Considering you could toss in <$1500 and run in the 11s in the 1/4, that's pretty impressive to me. For a luxury sport sedan...
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      02-24-2014, 05:43 PM   #59
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Xdrive has locking center diff?

The x6 doesnt even have locking diffs. No?
Whatever system they have in place to get the front wheels going when rear wheel slip is recognized. I'm not really familiar with the car, I only drive it on rare occasions, its my wife's car, she picked it out. I drive old cars with no cool electronics or AWD. You guys know better then I do how it works. I assumed it worked like other AWD systems I've seen.

I don't know much about cars, I just get in and do my best to drive. Most of you guys are probably all faster and more knowledgable.
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      02-24-2014, 05:54 PM   #60
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Xdrive has locking center diff?

The x6 doesnt even have locking diffs. No?
Xdrive is an electronically actuated clutchpack, so it could be in the "locked" position if they wanted it to be. If you've ever driven a 4x4 at low speed, it's clear that this is fail. So most likely the diff locks in a split when launching or driving straight at low speed. There is also a feedback system superimposed which can change the split if it believes the rear axle is freely spinning on ice.
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      02-24-2014, 06:05 PM   #61
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We're really that concerned about the 1/4 mi time in a luxury coupe?
I have been known to race anything including Popsicle sticks down a rainwater gutter and everything in between most of my life. Why would this be any different?

They say the first car race probably dates back to whenever the second car had finished production.

Its either in your blood or it isn't.
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      02-24-2014, 06:12 PM   #62
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nice runs
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      02-24-2014, 06:13 PM   #63
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Quote:
Originally Posted by Mik3ymomo
Quote:
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We're really that concerned about the 1/4 mi time in a luxury coupe?
I have been known to race anything including Popsicle sticks down a rainwater gutter and everything in between most of my life. Why would this be any different?

They say the first car race probably dates back to whenever the second car had finished production.

Its either in your blood or it isn't.
Haha nice history lesson.
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      02-24-2014, 06:14 PM   #64
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I have an F32 XDrive Msport with PPK and MPE on order ETA mid May.

Anybody know what will be the 0-60 & 1/4 mile times on a car "tuned" like this ? I try to find this info on the web but without success...
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      02-24-2014, 06:34 PM   #65
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We're really that concerned about the 1/4 mi time in a luxury coupe?
Um, yeah
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      02-24-2014, 06:36 PM   #66
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I have been known to race anything including Popsicle sticks down a rainwater gutter and everything in between most of my life. Why would this be any different?

They say the first car race probably dates back to whenever the second car had finished production.

Its either in your blood or it isn't.
Love it
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