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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Tracking, Autocrossing, Dragstrip, Driving Techniques > 1/4 mile times 335i



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      01-08-2016, 02:37 AM   #23
Ivahnn
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Quote:
Originally Posted by Cory S View Post
Don't pay attention to reaction time. It doesn't affect your ET.

Practice with the car on the launch, not going on green. The timer doesn't start until your front tires roll about 6" forward, not when the tree goes green.
Thanks Cory, I will give it a shot. I was leaving on last Amber but found the car hesitate when I wanted it to go. Will launch a little sooner and that should drop it down. What sort of tyre psi do you guys usually run on the 1/4 mile track?
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      01-08-2016, 03:02 AM   #24
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I'm AWD, so standard street pressure works great. Try 26-28psi. Also, make sure you are in 1st gear on launch.
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      03-30-2016, 09:47 AM   #25
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Originally Posted by Ivahnn View Post
I ran my n55 DCT last night for the first time on a very humid and hot night and could only do a 2.4 60 foot time. Dunno where I am going wrong but my car has catless dp, jb4 was on map 5, er cp an er intercooler and afe intake. Could only pull a 13.5. Launching with the DCT. Any tips for lowering my 60 foot time? I am thinking of lowering psi in rear tyres and mixing some e85 for a e30 mix next time I go.
Launching a DCT is very difficult. No brake boosting so you only have two options. 1st is just mash the gas when the lights turn yellow. 2nd is to use the cars factory launch control. At least the 135i LC is 3500 RPMs. The 335is LC is 5k RPMs. I tried it once and just blew the tires off. BuraQ gave me some pointers today on how to use the LC and not launch at 5k so I'm gonna try that out this weekend. You're never going to cut 1.6 60's in a DCT though. There have been some pretty good ETs lately from DCT cars. I'd say try using your stock LC. I also have a set of MT ET streets now just for the track on a set of 135i style 264s. They hook really well.
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      04-26-2016, 07:26 AM   #26
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I saw a post from burq and he was saying if you let the brake out as far out without completely releasing it and give some rpm but whilst keeping brake to stop car moving is how to get the car off the line without hesitating as the DCT is affected by brake because the clutch engages if you quickly take foot of brake pedal. I might try both methods and see how it goes as heading to the track tomorrow night
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      04-26-2016, 07:53 AM   #27
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Quote:
Originally Posted by Ivahnn View Post
I saw a post from burq and he was saying if you let the brake out as far out without completely releasing it and give some rpm but whilst keeping brake to stop car moving is how to get the car off the line without hesitating as the DCT is affected by brake because the clutch engages if you quickly take foot of brake pedal. I might try both methods and see how it goes as heading to the track tomorrow night
Yeah, I'm just going to wait until I get the 135i LC flashed on the car before I do any more drag racing. I've got some parts to put on too so it might be a while.
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      05-19-2016, 09:03 AM   #28
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just went to a 1/4 drag strip last night and witnessed a N55 335i sedan pull a 8.66??

Car didnt sound like it had catless dp or an exhaust system. Maybe just a tune. Very interesting.
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      05-19-2016, 10:22 AM   #29
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just went to a 1/4 drag strip last night and witnessed a N55 335i sedan pull a 8.66??

Car didnt sound like it had catless dp or an exhaust system. Maybe just a tune. Very interesting.
My N55 Sedan went 8.1 in the 1/8th with just axle back Dinan exhaust and self tuning through Cobb AP.
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      05-19-2016, 10:50 AM   #30
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my bad mustve been 1/8th. fast as hell though! love it
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      06-02-2016, 07:41 PM   #31
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I ran once mostly stock with some DP's and a tune on OEM wheels and runflats with a Cobb AP.

1.7 - 60 foot
12.0 - 1/4

Since then I have Apex wheels Hexon RR600's and RB inlets with MHD. After TBI I will shoot for a 10.8-11.1 pass!
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      06-02-2016, 10:47 PM   #32
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Goodluck on that.. Keep us posted
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      06-03-2016, 09:09 AM   #33
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Quote:
Originally Posted by Welterweight View Post
I ran once mostly stock with some DP's and a tune on OEM wheels and runflats with a Cobb AP.

1.7 - 60 foot
12.0 - 1/4

Since then I have Apex wheels Hexon RR600's and RB inlets with MHD. After TBI I will shoot for a 10.8-11.1 pass!
I like your enthusiasm but plan on yanking every non essential ounce you can if you're serious.
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      04-28-2018, 07:40 PM   #34
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Old thread, but I just ran at Reynolds today. Stock other than a BMS dci on 93, temp was around 85 degrees. Ran 13.1@106 with a 0.124 r/t. Ran in normal D mode.
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      04-28-2018, 07:42 PM   #35
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My 60ft was 1.8x, did a healthy burnout and had no wheelspin. My first run was 13.7, but the first run I opted to bypass the burnout box and got hella wheelspin when I came of the brake.
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      04-29-2018, 06:30 PM   #36
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Quote:
Originally Posted by The_Dealer View Post
Old thread, but I just ran at Reynolds today. Stock other than a BMS dci on 93, temp was around 85 degrees. Ran 13.1@106 with a 0.124 r/t. Ran in normal D mode.
Good time for stock, why not Sport mode?
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      05-02-2018, 07:28 PM   #37
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first time on the track in 15 years

first run 12.4 @ 114
second run 11.95 @ 116

Didnt think id break 11s with my mods

clip of the 1/4 run



2007 E92 335i / VRSF 5" FMIC / VRSF Charge Pipe / VRSF DCI / TurboSmart Plumb Back DV / XHP / E40 Custom Tune by Wedge / 11.95 @ 116
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