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BMW 3-Series (E90 E92) Forum > BMW E90/E92/E93 3-series General Forums > General E90 Sedan / E91 Wagon / E92 Coupe / E93 Cabrio > Need help getting a better 1/4 mile



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      06-11-2013, 05:12 PM   #1
3DIRTY5NJ
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Need help getting a better 1/4 mile

So this past Wednesday I did a 1/4 mile run for the first time in my 2009 e90 lci 335i 6MT. Mods are jb4 G5 ISO, DCI, DPs, and a 60/40 mix of e85. I did my first run in map 7 and left DTC on. Time was an upsetting 13.440, 60' 2.230 and trapped at 106.09.I was shooting to be in the 12s since these cars stock professionally driven can do 13.5. Car is my first 6 speed and I've never done a 1/4 mile before. I know I shifted late in a few gears which is why I have a slow trap and also my launch was slow. I launched around 3k but my friend told me I should be launching at the highest torque curve which I have no idea what is it since I've never dyno'd. So please let me know what I can do to be in the 12s or even a 13 flat would make me happy. If anyone needs any more info feel free to ask. Thanks guys!
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      06-11-2013, 05:17 PM   #2
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I have heard 1600-1800 RPM, and learn to feather it in.

Edit: By feather, I meant the gas. Also, and this might be very obvious, make sure your DST is off.
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      06-11-2013, 05:20 PM   #3
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Practice makes perfect, especially in a manual. You'll probably never attain numbers like the boys in automatics, due to their consistently fast shift times, the difference in gearing, and boost being better maintained during shifts, but you should be able to do a good deal better than that.
Also, remember this very important acronym: BTMS, Beware The Money Shift
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      06-11-2013, 05:45 PM   #4
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You expected way too much out of yourself and the car considering it was your first ever trip down a drag strip. My advice would be to set the piggyback tune back to stock boost levels and st a goal of laying down consistent times. Turn up the boost as you gain experience. More power just leads to more problems when you are just learning how to launch a car.
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      06-11-2013, 05:57 PM   #5
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Mo' powah, mo' problums.
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      06-11-2013, 05:59 PM   #6
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LAUNCH LAUNCH LAUNCH.

2.3 60' isnt going to get you anywhere. 2.0 and under will get you a great time....if you dont shift like a grandma.

This all depends on your rubber too. You may also benefit from a 2 step.
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      06-11-2013, 06:01 PM   #7
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Quote:
Originally Posted by CombatNinja View Post
You expected way too much out of yourself and the car considering it was your first ever trip down a drag strip. My advice would be to set the piggyback tune back to stock boost levels and st a goal of laying down consistent times. Turn up the boost as you gain experience. More power just leads to more problems when you are just learning how to launch a car.
Yeah this is what I was thinking pretty much. My first RT back in the day was over a second. WTF? I was looking at the lights, but with the crowd around and everything I just froze for that second...

Got better, easier later. I'd recommend a conservative map, not worry too much about MORE power cause the answer is going to be in tires, and practice. Once you're consistent, RT, 60', etc. then start worrying about more power. Practice practice practice.
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      06-11-2013, 06:12 PM   #8
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I am at the same point as you, except i didnt go to the drag strip, i used my COBB.

335 sedan 09 x drive 6MT with short throw shifter, i went 13.0 1st try.

0-60mph in 4.28.. I can definitly make better numbers since i suck at driving manual
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      06-11-2013, 06:13 PM   #9
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Power is worthless if you're not putting it down- less power in the beginning- than ramp your way up. A LSD definitely doesn't hurt
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      06-11-2013, 10:06 PM   #10
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Yeah I'm gonna look at some drag radials. I mean I don't shift like a grandma and my launch was a little tame since I was nervous with all the flashing lights and no green to go? Don't know if that was a mess up or that's normal behavior when you're not doing a head to head. I mean i have launching down, just have to remember to not floor it in 1st gear to keep traction. Maybe should of have ran my normal auto tune map 5 instead of putting map 7 on with a 18.5 target which also felt it bog in 3rd or 4th. Have to get logs done with e85 in the car.
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      06-11-2013, 10:40 PM   #11
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Quote:
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Yeah I'm gonna look at some drag radials. I mean I don't shift like a grandma and my launch was a little tame since I was nervous with all the flashing lights and no green to go? Don't know if that was a mess up or that's normal behavior when you're not doing a head to head. I mean i have launching down, just have to remember to not floor it in 1st gear to keep traction. Maybe should of have ran my normal auto tune map 5 instead of putting map 7 on with a 18.5 target which also felt it bog in 3rd or 4th. Have to get logs done with e85 in the car.
remember that your time starts when you leave the tree, not when it turns green. so dont worry about your RT.

Raceway park? or atco? Im looking to go soon.
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      06-12-2013, 07:56 AM   #12
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Quote:
Originally Posted by CombatNinja View Post
You expected way too much out of yourself and the car considering it was your first ever trip down a drag strip. My advice would be to set the piggyback tune back to stock boost levels and st a goal of laying down consistent times. Turn up the boost as you gain experience. More power just leads to more problems when you are just learning how to launch a car.

^ what he said. No point in having all of those upgrades if you fly through the rpms and end up shifting late. You should be in the mid 12's with your mods.



When I was stock I did 13.4 all day. Granted I was using paddle shifters and didn't have a third pedal to work, but I'll attach my ticket.
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      06-12-2013, 08:15 AM   #13
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Fastest I got on 18's with grippy tires, auto with split second tt was 12.9 -- but I'm used to the world of the light tree so that's all fwiw.

If I can find my timeslips I'll post it up.

I was one of the first 335's at the local track.
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      06-12-2013, 12:07 PM   #14
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remember that your time starts when you leave the tree, not when it turns green. so dont worry about your RT.

Raceway park? or atco? Im looking to go soon.
I'm gonna try island drag way once it opens up again in July. Suppose to get unlimited runs. Raceway park is a long wait and I couldn't get 3 runs in
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      06-12-2013, 12:08 PM   #15
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^ what he said. No point in having all of those upgrades if you fly through the rpms and end up shifting late. You should be in the mid 12's with your mods.



When I was stock I did 13.4 all day. Granted I was using paddle shifters and didn't have a third pedal to work, but I'll attach my ticket.
Lol you can't compare an auto to a manual. It's easy to push your foot to the floor and go. Plus with my mods it's hard to keep traction which is why I'm lookin into getting slicks.
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      06-12-2013, 12:13 PM   #16
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Not much punch left above 6200 RPM so short-shift a bit if you were winding it out till redline. Search a bit as others have posted suggested shift points by gear.

Good Luck.
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