Auto drivers...where do you shift at in the 1/4mile?

LSUbimmer · 11-29-2009, 10:55 PM

What rpm?

And is the paddle shifter any faster then just keeping the car in DS.

Ron1n · 11-29-2009, 10:59 PM

Untuned, you should be shifting at about 6000-6200 RPMs. And if the peddle is to the floor, everything shifts the same (meaning, if you were in D vs. DS and you floored it, neither would shift faster than the other).

jopa489 · 11-29-2009, 11:07 PM

There is no way tap-shifting is going to give you better results in the 1/4 mile. This has been beaten to death on here - if you have Step, slap it in DS and hit the gas. Simple as that.

LSUbimmer · 11-29-2009, 11:11 PM

Quote:

Originally Posted by jopa489

There is no way tap-shifting is going to give you better results in the 1/4 mile. This has been beaten to death on here - if you have Step, slap it in DS and hit the gas. Simple as that.

ok thats what i was wondering about the tap-shifting.

why even put the car in DS if its not any faster then just mashing the gas in D?

LSUbimmer · 11-29-2009, 11:11 PM

Quote:

Originally Posted by Ron1n

Untuned, you should be shifting at about 6000-6200 RPMs. And if the peddle is to the floor, everything shifts the same (meaning, if you were in D vs. DS and you floored it, neither would shift faster than the other).

What about when I get the JB3? same shift points?

Ron1n · 11-29-2009, 11:13 PM

Tuned, I believe it's 6500...torque band gets extended, but not by much at the high end.

jopa489 · 11-29-2009, 11:14 PM

Quote:

Originally Posted by LSUbimmer

ok thats what i was wondering about the tap-shifting.

why even put the car in DS if its not any faster then just mashing the gas in D?

You don't have to. Mashing the gas in D yields the exact same result as DS in a straight line.

NiVeDh · 11-29-2009, 11:27 PM

I have a 6MT so I might be wrong...

Doesn't D start in 2nd gear and DS starts in 1st?

Ron1n · 11-29-2009, 11:29 PM

Don't think that's the case if you floor it.

I know the only difference I see between DS and D is that DS holds the gears longer (and won't go into 6th, of course).

nyc3r · 11-29-2009, 11:29 PM

Quote:

Originally Posted by NiVeDh

I have a 6MT so I might be wrong...

Doesn't D start in 2nd gear and DS starts in 1st?

yup, D starts in 2nd gear.. DS > D

jopa489 · 11-29-2009, 11:35 PM

Quote:

Originally Posted by NiVeDh

I have a 6MT so I might be wrong...

Doesn't D start in 2nd gear and DS starts in 1st?

Err, you're right - for the 335. The 328 starts in 1st either way, I believe. Drive 6MT here too, so not entirely sure on that.

If that's the case, DS is your best bet for the 335.

MeinBMW · 11-29-2009, 11:37 PM

I have heard you should try and shift early ... like around 5500 from 1st to 2nd and then let the tranny shift the rest of the way ... any truth to that?

LostMarine · 11-30-2009, 12:49 AM

Quote:

Originally Posted by jopa489

You don't have to. Mashing the gas in D yields the exact same result as DS in a straight line.

wrong.. shifts faster in DS than D straightline or not..

ive tried all of these, shifting on your own at 6600rpm will give the fastest E.T. (3mph in my case)

Robert · 11-30-2009, 01:01 AM

these automatics are so good to paddle shift is really a moot point. get a manual if you enjoy shifting, which I regret giving up and will definitely get back into in 2-3 years.

demosthenes · 11-30-2009, 10:12 AM

For the vast majority of cars (edited: gasoline), shift at redline. You want to stay in each gear as long as you can to take advantage of the lower gearing. It more than makes up for the drop off in torque.

You can do the numbers yourself. Multiply torque at the higher RPM (6000, 6500, 7000) times the lower gear ratio. Then multiply torque at the RPM in the next gear times the next gear ratio. I'd do it right now but I've got to run.

Ti335 · 11-30-2009, 10:36 AM

Quote:

Originally Posted by Ron1n

Untuned, you should be shifting at about 6000-6200 RPMs. And if the peddle is to the floor, everything shifts the same (meaning, if you were in D vs. DS and you floored it, neither would shift faster than the other).

Except when you're in D, you start in 2nd gear, so you'd always be slower in the quarter mile compared to DS.

Ti335 · 11-30-2009, 10:52 AM

Quote:

Originally Posted by LSUbimmer

ok thats what i was wondering about the tap-shifting.

why even put the car in DS if its not any faster then just mashing the gas in D?

A number of reasons. First of all, you start in first gear (in D you always start in second). Second, the gears are held longer than in D. In DS, you can get to 4000-5000 rpm at half throttle; in D, the only way to get there is by flooring the gas (and most of the time, you don't wanna do that). Third, moving the shift lever from D to DS at cruising speed cause a downshift and brings the rpm up to the 2000-2200 range, which is where the turbo kicks in (in D, your rpms are usually well below 2000). This is particularly useful when you anticipate making a passing maneuver.

LSUbimmer · 11-30-2009, 01:39 PM

Quote:

Originally Posted by LostMarine

wrong.. shifts faster in DS than D straightline or not..

ive tried all of these, shifting on your own at 6600rpm will give the fastest E.T. (3mph in my case)

so you paddle shift in DS for your fastest results?

Ron1n · 11-30-2009, 01:41 PM

Quote:

Originally Posted by LostMarine

wrong.. shifts faster in DS than D straightline or not..

ive tried all of these, shifting on your own at 6600rpm will give the fastest E.T. (3mph in my case)

Actually, *you* are wrong. DS' primary function is to hold the gears longer, not change them faster.

Javier · 11-30-2009, 02:57 PM

You're all wrong!! DS takes you back in time once you hit 88mph D doesn't, everyone knows that

jopa489 · 11-30-2009, 05:33 PM

Quote:

Originally Posted by Ron1n

Actually, *you* are wrong. DS' primary function is to hold the gears longer, not change them faster.

The GM unit in the Step 328 and ZF unit in the Step 335 both shift just as quickly in D as they do in DS. As Ron1n said, DS holds the gears and is absolutely the faster way around a track. In a straight line the shift speeds are the same.

The only question remaining is whether or not the 335 starts in 2nd gear when in D. It might (other BMWs certainly do), but I'm not sure enough to make a definitive statement. If they do, DS would be quicker for that reason alone.

LostMarine · 11-30-2009, 05:50 PM

Quote:

Originally Posted by Ron1n

Actually, *you* are wrong. DS' primary function is to hold the gears longer, not change them faster.

You can't say im wrong if im not, i'll guarantee the actual shift time is faster in DS than D.. Not talkin about time in gear talking about time in between shifting gears.. it makes sense to faster shifts in "sport" than "drive"

when it dries up around here and i get to the track i'll post some vids and you can see the difference

Quote:

Originally Posted by LSUbimmer

so you paddle shift in DS for your fastest results?

yes 6500-6600rpm

11-29-2009, 10:55 PM	#1
LSUbimmer Your mom's house 17 Rep 349 Posts Drives: 07' 335i Join Date: Jul 2009 Location: Baton Rouge,La iTrader: (0)	Auto drivers...where do you shift at in the 1/4mile? What rpm? And is the paddle shifter any faster then just keeping the car in DS.
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11-29-2009, 10:59 PM	#2
Ron1n Speed Demon 205 Rep 3,690 Posts Drives: 2021 M5C Join Date: Oct 2009 Location: Irvine iTrader: (6) Garage List 2021 M5 Competition [0.00] 2016 BMW 550i [0.00] 2011 335is [0.00] 2009 E93 M3 [10.00] 2010 335d [9.50]	Untuned, you should be shifting at about 6000-6200 RPMs. And if the peddle is to the floor, everything shifts the same (meaning, if you were in D vs. DS and you floored it, neither would shift faster than the other). __________________ Current: '21 M5C, '15 X6 50i Previous: '18 M550i, '16 550i, '11 335is, '09 E93 M3 DCT, '10 E90 335d, '07 E90 328i
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11-29-2009, 11:07 PM	#3
jopa489 Major General 122 Rep 6,594 Posts Drives: Anything with Wheels Join Date: Mar 2009 Location: USA iTrader: (9)	There is no way tap-shifting is going to give you better results in the 1/4 mile. This has been beaten to death on here - if you have Step, slap it in DS and hit the gas. Simple as that. __________________ X7 LCI // Incoming C7 ZR1 ZTK // Sebring + TRX // Hydro + Raptor Gen1 Roush // Tuxedo
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11-29-2009, 11:13 PM	#6
Ron1n Speed Demon 205 Rep 3,690 Posts Drives: 2021 M5C Join Date: Oct 2009 Location: Irvine iTrader: (6) Garage List 2021 M5 Competition [0.00] 2016 BMW 550i [0.00] 2011 335is [0.00] 2009 E93 M3 [10.00] 2010 335d [9.50]	Tuned, I believe it's 6500...torque band gets extended, but not by much at the high end. __________________ Current: '21 M5C, '15 X6 50i Previous: '18 M550i, '16 550i, '11 335is, '09 E93 M3 DCT, '10 E90 335d, '07 E90 328i
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11-29-2009, 11:27 PM	#8
NiVeDh Major General 422 Rep 8,003 Posts Drives: '08 E90 335i, '99 E36 M3 Join Date: Apr 2009 Location: Houston, TX & Atlanta, GA iTrader: (132) Garage List 2008 BMW 335i Sedan [8.66]	I have a 6MT so I might be wrong... Doesn't D start in 2nd gear and DS starts in 1st?
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11-29-2009, 11:29 PM	#9
Ron1n Speed Demon 205 Rep 3,690 Posts Drives: 2021 M5C Join Date: Oct 2009 Location: Irvine iTrader: (6) Garage List 2021 M5 Competition [0.00] 2016 BMW 550i [0.00] 2011 335is [0.00] 2009 E93 M3 [10.00] 2010 335d [9.50]	Don't think that's the case if you floor it. I know the only difference I see between DS and D is that DS holds the gears longer (and won't go into 6th, of course). __________________ Current: '21 M5C, '15 X6 50i Previous: '18 M550i, '16 550i, '11 335is, '09 E93 M3 DCT, '10 E90 335d, '07 E90 328i
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11-29-2009, 11:37 PM	#12
MeinBMW Private First Class 6 Rep 198 Posts Drives: 2009 335i Join Date: Mar 2008 Location: NH iTrader: (2)	I have heard you should try and shift early ... like around 5500 from 1st to 2nd and then let the tranny shift the rest of the way ... any truth to that? __________________ Not Stock...
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11-30-2009, 01:01 AM	#14
Robert Major General 417 Rep 6,968 Posts Drives: 135i -> is350 -> Tesla M3 perf Join Date: Aug 2005 Location: Socal iTrader: (1)	these automatics are so good to paddle shift is really a moot point. get a manual if you enjoy shifting, which I regret giving up and will definitely get back into in 2-3 years.
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11-30-2009, 10:12 AM	#15
demosthenes Major 48 Rep 1,162 Posts Drives: E90 328i 6MT Join Date: Dec 2006 Location: SF Bay Area iTrader: (0) Garage List 2008 328i sedan [0.00]	For the vast majority of cars (edited: gasoline), shift at redline. You want to stay in each gear as long as you can to take advantage of the lower gearing. It more than makes up for the drop off in torque. You can do the numbers yourself. Multiply torque at the higher RPM (6000, 6500, 7000) times the lower gear ratio. Then multiply torque at the RPM in the next gear times the next gear ratio. I'd do it right now but I've got to run. Last edited by demosthenes; 12-01-2009 at 10:57 AM.. Reason: clarification
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11-30-2009, 02:57 PM	#20
Javier Major 80 Rep 1,109 Posts Drives: 335i E92 Join Date: Nov 2006 Location: Puerto Rico iTrader: (0)	You're all wrong!! DS takes you back in time once you hit 88mph D doesn't, everyone knows that __________________ 2007 328i Crimson Red SOLD 2010 335i MSport AW E92
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