What is launching

marinellie · 04-04-2010, 06:41 PM

OK I here about this all the time over here. But what does launching mean when it comes to the dragstrip. A good detail explanation work be nice. Thanks in advance.

mkaaes · 04-04-2010, 07:42 PM

A combination of controlling the clutch and throttle to try and get the quickest take off (launching) with minimal wheelspin and bogging

marinellie · 04-04-2010, 07:45 PM

Quote:

Originally Posted by mkaaes

A combination of controlling the clutch and throttle to try and get the quickest take off (launching) with minimal wheelspin and bogging

So I take it that launching is only done in the 6MT cars and not the 6AT cars?

NiVeDh · 04-04-2010, 08:38 PM

Quote:

Originally Posted by marinellie

So I take it that launching is only done in the 6MT cars and not the 6AT cars?

6ATs have a different launching technique.

mkaaes · 04-04-2010, 11:40 PM

You can do what's called a tranny drop, but it's very hard on ur car. I would not recommend doing it tho.

JayKay335i · 04-05-2010, 01:19 AM

Quote:

Originally Posted by mkaaes

You can do what's called a tranny drop, but it's very hard on ur car. I would not recommend doing it tho.

Tranny drop? Its not 1963, nor do we own LFAs.

You brake boost with a 6AT

JayKay335i · 04-05-2010, 01:34 AM

Quote:

Originally Posted by TrackRat

People in 2010 have also been known to be technically challenged...

I'm pretty sure that cars with computers don't even allow you to tranny drop any more.

marinellie · 04-05-2010, 08:43 AM

So what or how do you do brake boost with the car. Mine is a 6AT. Thanks for all the replies and help.

mkaaes · 04-05-2010, 08:09 PM

Just like it sounds, put your foot on the brakes add a little throttle bringing up the rpm while not moving and then let off the brakes and mash the pedal through the floor

marinellie · 04-05-2010, 08:23 PM

Quote:

Originally Posted by mkaaes

Just like it sounds, put your foot on the brakes add a little throttle bringing up the rpm while not moving and then let off the brakes and mash the pedal through the floor

At what RPM are you guys launching from. Or better yet what is a safe RPM to launch from without dropping you rear end on the ground?

envision · 04-05-2010, 09:09 PM

Turn DTC off. Brake boost to 2k rpm. Floor it.

JayKay335i · 04-05-2010, 09:09 PM

No such thing as safe. I usually go around ~2500. You cant just mash the throttle down with our cars as you'll just spin through first....and second....and half a of third.

sq86 · 04-06-2010, 12:20 PM

marinellie your going to have to find out what is most comfortable for you and also what the conditions are. I've heard of people brake boosting up to 4500 rpm while others only going to 2000 rpms. It also depends on what mods your have on your car. If you are running a lot more power than I would say tone it down unless your have super sticky rubber (but even tires will only go so far). Also if its a hot day out the rubber will get softer quicker and the track will probably be very greasy so you wont be able to get a great launch. Just play around with it a few times to see what works best for you.

BTW, JayKay335i I love your signature.

marinellie · 04-06-2010, 12:50 PM

Quote:

Originally Posted by sq86

marinellie your going to have to find out what is most comfortable for you and also what the conditions are. I've heard of people brake boosting up to 4500 rpm while others only going to 2000 rpms. It also depends on what mods your have on your car. If you are running a lot more power than I would say tone it down unless your have super sticky rubber (but even tires will only go so far). Also if its a hot day out the rubber will get softer quicker and the track will probably be very greasy so you wont be able to get a great launch. Just play around with it a few times to see what works best for you.

BTW, JayKay335i I love your signature.

Thanks for that break down. I am guessing I will be taking it on the easy side first. Going to the test and tune day this Sunday at the track. Hope the weather holds up.

frans335 · 04-10-2010, 11:07 AM

Quote:

Originally Posted by marinellie

Thanks for that break down. I am guessing I will be taking it on the easy side first. Going to the test and tune day this Sunday at the track. Hope the weather holds up.

I went last night for the first time with this car. I was pretty proud of the car, it has JB+ at half setting and ran 13.4 at 104.4. This track is considered a slower track here in the midwest so I was pretty happy. I brake boosted to 2k and seemed to be a good spot, 60ft was 1.91.

Good luck to you and have fun!

JayKay335i · 04-11-2010, 02:30 AM

Nice 60'. Turn that JB+ up to 75% at the least.

deecee · 04-14-2010, 11:31 PM

is brake boosting going to spoil the brakes or tranny or some sorta thing? I heard it might destroy the torque converter or somthing. Im no mechanic tho.

JayKay335i · 04-15-2010, 07:13 PM

Eventually.

Jjse90 · 04-19-2010, 02:22 PM

I brake boost my car to about 2k to 2.5k my best 60' was a 1.84 followed by a 1.89 on street tires in a 6at we will see if I can get any lower 60' with more practice.

04-04-2010, 06:41 PM	#1
marinellie Saving lives one shift at a time 21 Rep 309 Posts Drives: 2008 BMW 335i Join Date: May 2009 Location: Farmington, CT iTrader: (1)	What is launching OK I here about this all the time over here. But what does launching mean when it comes to the dragstrip. A good detail explanation work be nice. Thanks in advance.
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04-04-2010, 07:42 PM	#2
mkaaes Lieutenant 28 Rep 419 Posts Drives: 997.2 C4S Join Date: May 2007 Location: seattle iTrader: (2)	A combination of controlling the clutch and throttle to try and get the quickest take off (launching) with minimal wheelspin and bogging
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04-04-2010, 11:40 PM	#5
mkaaes Lieutenant 28 Rep 419 Posts Drives: 997.2 C4S Join Date: May 2007 Location: seattle iTrader: (2)	You can do what's called a tranny drop, but it's very hard on ur car. I would not recommend doing it tho.
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04-05-2010, 08:43 AM	#8
marinellie Saving lives one shift at a time 21 Rep 309 Posts Drives: 2008 BMW 335i Join Date: May 2009 Location: Farmington, CT iTrader: (1)	So what or how do you do brake boost with the car. Mine is a 6AT. Thanks for all the replies and help.
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04-05-2010, 08:09 PM	#9
mkaaes Lieutenant 28 Rep 419 Posts Drives: 997.2 C4S Join Date: May 2007 Location: seattle iTrader: (2)	Just like it sounds, put your foot on the brakes add a little throttle bringing up the rpm while not moving and then let off the brakes and mash the pedal through the floor
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04-05-2010, 09:09 PM	#11
envision First Lieutenant 36 Rep 373 Posts Drives: 2009 LCI Msport Join Date: Nov 2009 Location: Los Angeles, CA iTrader: (9)	Turn DTC off. Brake boost to 2k rpm. Floor it. __________________ E90 LCI by LTBMW
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04-05-2010, 09:09 PM	#12
JayKay335i Banned 200 Rep 5,046 Posts Drives: ///M323 DCT Join Date: Apr 2009 Location: North Dakota; its best DUHHHHHH iTrader: (1)	No such thing as safe. I usually go around ~2500. You cant just mash the throttle down with our cars as you'll just spin through first....and second....and half a of third.
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04-06-2010, 12:20 PM	#13
sq86 Captain 359 Rep 781 Posts Drives: 2013 328i E92 LMB Join Date: Apr 2007 Location: Brooklyn iTrader: (0) Garage List 2013 BMW 328i (E92) [0.00]	marinellie your going to have to find out what is most comfortable for you and also what the conditions are. I've heard of people brake boosting up to 4500 rpm while others only going to 2000 rpms. It also depends on what mods your have on your car. If you are running a lot more power than I would say tone it down unless your have super sticky rubber (but even tires will only go so far). Also if its a hot day out the rubber will get softer quicker and the track will probably be very greasy so you wont be able to get a great launch. Just play around with it a few times to see what works best for you. BTW, JayKay335i I love your signature. __________________ BMW CCA Member# 481791 Current: 2013 E92 328i LMB/Saddle Brown (1 of 21 for E92 LCI in that combo), 2018 F31 330xi AW/Saddle Brown Sold: 2011 1M BS/Black, 2008 E90 328xi AW/Beige, 2001 E46 330xi SG/Black
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04-11-2010, 02:30 AM	#16
JayKay335i Banned 200 Rep 5,046 Posts Drives: ///M323 DCT Join Date: Apr 2009 Location: North Dakota; its best DUHHHHHH iTrader: (1)	Nice 60'. Turn that JB+ up to 75% at the least.
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04-14-2010, 11:31 PM	#17
deecee Private 6 Rep 77 Posts Drives: E90 320i Join Date: Sep 2009 Location: Hong Kong iTrader: (0)	is brake boosting going to spoil the brakes or tranny or some sorta thing? I heard it might destroy the torque converter or somthing. Im no mechanic tho. __________________ ---E90 320i 2008 make --- ---K&N Air Filter//19" Inovit Tuning Black Rims with Chrome Surrounding//H&R Spacer// Okada Ignition Coil// Ferodo Performance Brake Pads// Philips Crystal Vision 4300K Headlights//Chrome Line Retrofit Kit for 320i//BMW Performance Aluminium Pedals//Tinted Windows//BMW Performance Suspension Kit//BMW Performance Auto Shift Knob//Black Tint---
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04-15-2010, 07:13 PM	#18
JayKay335i Banned 200 Rep 5,046 Posts Drives: ///M323 DCT Join Date: Apr 2009 Location: North Dakota; its best DUHHHHHH iTrader: (1)	Eventually.
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04-19-2010, 02:22 PM	#19
Jjse90 1 quick sedan 3 Rep 75 Posts Drives: 2009 BMW 335i sedan Join Date: Feb 2010 Location: West palm beach,FL iTrader: (0)	I brake boost my car to about 2k to 2.5k my best 60' was a 1.84 followed by a 1.89 on street tires in a 6at we will see if I can get any lower 60' with more practice. __________________ 2009E90/jetblack/saddle/prem/sport/nav/auto/ca/15%tint/Dinan stage 2 reflash/drop in k&n
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