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BMW 3-Series (E90 E92) Forum
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335d best way to accelerate
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02-24-2013, 02:26 PM | #1 |
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335d best way to accelerate
Hi guys ... Out of interest whats the best / fastest way of getting the 335d moving?? Im finding with mine its a bit sluggish at getting off the lights and would like some advice?? So far ive tried plating my foot down in sport mode, pulling away in 2nd , turning off traction control ect but still the same results. Ive been told to keep my foot on the brake and accelerate hard then dump off the brake ( as if it were a clutch ) but what do you guys think??
Im only interested as its my first time on a drag strip next month and would like the best results!!! Thanks |
02-24-2013, 02:29 PM | #2 |
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02-24-2013, 06:28 PM | #4 |
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Drives: 2011 335d, M-Sport
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I like to use the skinny pedal.
...but seriously, best launch for this car (sans modifications as alluded to by Greek in his link to a LSD thread) is to put it in second gear, brake boost to about 2k and let off the brake, modulating throttle for traction. After that, your shifts are about at 4k rpm. If she's a slouch off the line, there's something wrong. |
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02-24-2013, 08:39 PM | #5 |
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Phase 1: Buy a JBD or other tune
Phase 2: ???? Phase 3: Profit But yea, I found brake boosting at 2-2.3k RPM with TC fully off, and gradually increase throttle until you feel traction breakage isn't an issue. Takes a little bit of practice to launch this car without making a 20ft 11 The 4k RPM shift point is pretty good to use, even after a tune. This car just doesn't like going past 4300rpm.
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Deleted, ATM I/C and tuned by B.R.R.
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02-24-2013, 08:43 PM | #6 |
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I guess most may have noticed that some of the hyperlinks won't work with mobile devices, at least that's my experience with the iPood-type devices.
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2021 X3 M40i: M Sport Differential, Adaptive M Suspension.
Previous BMWs: 1971 BMW 2002, 1973 BMW R75/5, and 2011 BMW 335d Previous Other Vehicles: '67 Cougar, '70 911e, '86 Jetta Diesel, '05 and '12 Foresters, et al. |
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02-25-2013, 01:15 AM | #7 | |
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02-25-2013, 05:41 AM | #8 |
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Amigos I DONT do the brake boost I just TURN OFF completely the DSC and put it on Sport mode M2 and step on it!!!!! and trust me with the RENNtech software and NOW the WAGNER IC the only smoke you"ll see is my TIRES!! LOL
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06-22-2013, 08:29 PM | #9 | |
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06-22-2013, 09:10 PM | #10 |
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Link or site where I can get one of these?
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06-22-2013, 09:15 PM | #11 |
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06-23-2013, 11:24 AM | #12 |
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I got the dtuk pedal box fitted on mine.you can adjust the throttle response with this and feels so much more responsive.cost about £170 for the pedal box.
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06-24-2013, 06:49 AM | #13 |
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you know something a friend of mines put the SPRINT BOOSTER on his "D" here in Puerto Rico he stated that car runs smoother, I guess its on my BUCKET list for my baby
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RENNtech Flash(Lenny Wu)/WAGNER IC
Enkei Rajin 18"/Execuhitch Hitch/Koni FSD Soft Ride Bike Rack/Brava Synthetic Motor Oil(Made in Puerto Rico)/Meth(in the works)/CBU done w Andrew EGR Race Pipe (whoa! what an animal it is now) |
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06-24-2013, 11:51 AM | #14 |
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I always see mixed reviews about this product. Pretty damn pricey too. Anyone else using it?
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06-24-2013, 03:05 PM | #15 | |
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Just invest in one mate! If you don't like it I will deactivate my account! |
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06-24-2013, 05:04 PM | #16 |
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they get mixed reviews because they basically do the same thing your foot does just on a different scale. It feels more snappy and responsive because you thought you gave it 25% throttle but the sprint translates that to 40% throttle. Kind of like how your car would feel really snappy and fast if you went to press the brake and accidentally smashed the throttle instead.
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06-25-2013, 10:56 AM | #17 |
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Wow, that confident in the product huh? I might have to put it on the top of my mod priority list now. Windshield ceramic tint and painted calipers might have to wait!
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06-25-2013, 03:41 PM | #18 |
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Yeah mate, I would'nt BS you. My mate has one on his 335d and D feels liek DS and DS feels like.. WOW. I will have sprint booster and remap soon (mental!)
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06-25-2013, 04:13 PM | #19 |
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My method for a fast get away, traction completely off. Use 1st gear in manual, light throttle to about 2k with foot on brake. At the off Foot off brake, full throttle and as soon as car starts moving hit the gear change, by the time the gear changes it hits about 3.5 k which when it goes into 2nd you are now at peak torque. 2-3rd again change at about 3.5.. The rest you can go flat to 4k.
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06-26-2013, 12:32 PM | #20 | |
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06-28-2013, 09:44 AM | #21 |
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you are torque limited in 2nd too .. you are also gonna burn the crap out of your gearbox fluid by producing rather a lot of heat when you've got one foot on the brake and the other buried in the carpet
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06-28-2013, 11:30 AM | #22 |
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2nd gear brake boost launches are fine for the tranny, as long as you arent doing it from every stoplight. If the tranny fluid burned from the occasional brake boost, BMW would have constantly failing trannies from people driving in stop and go traffic. If youre doing a lot of racing though you should be changing your fluid more frequently, im pretty sure that semi frequent brake boosting falls well into the heavy duty use column where the recommendation is changing fluid every 30k.
Oh, and 2nd gear brake boosted launches are undoubtedly faster. If anyone gets better results in 1st its because they arent brake boosting enough or are too easy on the throttle pulling out, based on my experiences with launching this car and hundreds of 1/4 mile passes in other cars |
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