02-23-2014, 12:46 PM | #1 |
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My 435xi Msport quarter mile drag strip times
Featured on BIMMERPOST.com 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. |
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, 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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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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02-23-2014, 02:36 PM | #10 | |
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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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02-23-2014, 02:50 PM | #12 |
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02-23-2014, 03:04 PM | #13 |
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+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, 03:32 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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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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02-23-2014, 03:46 PM | #19 |
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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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02-23-2014, 03:51 PM | #21 | |
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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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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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