RPM drop when shifting? 6sp 335i

knivez · 08-09-2010, 06:26 PM

When you guys shift gears how much of a RPM drop are y'all experiencing? The reason is I always seem to get a 700-1000 rpm drop from gears; I shift in second gear at 3000 and end up starting at 2000 in third gear. I try to shift gears as fast as possible. I've been driving manual for almost ten years now and just started to notice this happening. I'm not sure if it is normal, especially after reading this post:

http://www.e90post.com/forums/showpo...0&postcount=46

Let me know what y'all think.

Atombyte · 08-09-2010, 07:08 PM

Yeah, the RPMs drop about 700 to 1k RPM when you shift gears. If they don't, that's when you have a problem.

Jason4486 · 08-09-2010, 07:09 PM

Completely normal pal. You said you have been driving manual cars for how long?

bimmertt · 08-09-2010, 07:10 PM

I have noticed this too. I have tried speeding up my shifts but it only helps a little. Can't tell you if this is normal behavior.

coh4777 · 08-09-2010, 07:12 PM

I find the trickiest shift is from 1st to 2nd in terms of managing the RPM drop. Are you experiencing problems while driving with the AC on full blast? That will definitely drop your RPM between shifts more so than usual. If all else fails, just shift slightly higher, at around 3500 RPM to get a smoother shift.

Yay-Z · 08-09-2010, 07:39 PM

Quote:

Originally Posted by coh4777

I find the trickiest shift is from 1st to 2nd in terms of managing the RPM drop. Are you experiencing problems while driving with the AC on full blast? That will definitely drop your RPM between shifts more so than usual. If all else fails, just shift slightly higher, at around 3500 RPM to get a smoother shift.

1st to second is definitely the trickiest. You have to rev to about 3500 rpm to be smooth.

1->2 gear ratio is about 2:1

U either have to shift really early or rev high

knivez · 08-09-2010, 07:53 PM

Quote:

Originally Posted by Jason4486

Completely normal pal. You said you have been driving manual cars for how long?

If you refer to the post I was talking about, that guy talks about how 500 rpm drops are optimal. I tried doing it and I couldn't achieve it; therefore I posted my question. I normally don't notice what my rpm drops are, as long as my shifts feel smooth.

knivez · 08-09-2010, 07:54 PM

Quote:

Originally Posted by coh4777

I find the trickiest shift is from 1st to 2nd in terms of managing the RPM drop. Are you experiencing problems while driving with the AC on full blast? That will definitely drop your RPM between shifts more so than usual. If all else fails, just shift slightly higher, at around 3500 RPM to get a smoother shift.

Yeah, I have my AC usually on full blast because it is hot in Texas haha.

JoeyBananaz18 · 08-09-2010, 07:55 PM

the revs on the 335s drop notoriously fast. thats why alot of people tend to complain about how getting it into gear and the 1-2 shift is kinda rough. i say its totally normal.

fasternfaster · 08-09-2010, 10:12 PM

Its not the first time i read this.. but have any of you guys though about applying slight throttle pressure while shifting? I know you need to take your foot off the gas to granny shift this car, but if you give it just a "bit" to keep the revs from dropping, you can shift as slow as you like..

2008E90TT · 08-09-2010, 11:46 PM

1st to 2nd is a bit tricky. I can nail it when I'm driving alone, but I tend to drive a bit aggressive and that's what I'm accustomed to. When I have to slow it down to keep passengers from complaining, I lose my rhythm and don't get a smooth shift every time.

I have to rev match from 4th to 5th and 5th to 6th by tapping the gas with the clutch in. It's impossible to shift it quick enough to get a smooth transition in those gears unless I just want to jam it into gear and tear up the synchros.

This is all with the A/C compressor on. It's not near as bad with it disengaged.

bman8 · 08-10-2010, 12:58 AM

This is very normal. Long throw stock shifter plus CDV induced delay can easily end you up with 700-1000 rpm drops. Over the time you will get use to it and tune to shift faster and smoother.

Remove the CDV and install a short shift kit makes a big difference. Although some people don't believe the CDV removal thing, I haven't heard one case people is not happy with CDV removal and want the CDV back. I am obviously biased because I am selling the modified CDV in Marketplace right now

Quote:

Originally Posted by knivez

When you guys shift gears how much of a RPM drop are y'all experiencing? The reason is I always seem to get a 700-1000 rpm drop from gears; I shift in second gear at 3000 and end up starting at 2000 in third gear. I try to shift gears as fast as possible. I've been driving manual for almost ten years now and just started to notice this happening. I'm not sure if it is normal, especially after reading this post:

http://www.e90post.com/forums/showpo...0&postcount=46

Let me know what y'all think.

08-09-2010, 06:26 PM	#1
knivez Private First Class 13 Rep 151 Posts Drives: 335i Join Date: Aug 2009 Location: texas iTrader: (1)	RPM drop when shifting? 6sp 335i When you guys shift gears how much of a RPM drop are y'all experiencing? The reason is I always seem to get a 700-1000 rpm drop from gears; I shift in second gear at 3000 and end up starting at 2000 in third gear. I try to shift gears as fast as possible. I've been driving manual for almost ten years now and just started to notice this happening. I'm not sure if it is normal, especially after reading this post: http://www.e90post.com/forums/showpo...0&postcount=46 Let me know what y'all think.
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08-09-2010, 07:08 PM	#2
Atombyte First Lieutenant 40 Rep 361 Posts Drives: 2013 M3, 2016 535i, 2019 540i Join Date: May 2007 Location: SC iTrader: (0) Garage List 2019 540i [0.00] 2016 535i [0.00] 2013 M3 [0.00]	Yeah, the RPMs drop about 700 to 1k RPM when you shift gears. If they don't, that's when you have a problem. __________________
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08-09-2010, 07:09 PM	#3
Jason4486 First Lieutenant 37 Rep 390 Posts Drives: 2011 335i M-Sport Join Date: Aug 2006 Location: Miami, Fl iTrader: (1)	Completely normal pal. You said you have been driving manual cars for how long?
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08-09-2010, 07:10 PM	#4
bimmertt Lieutenant Colonel 93 Rep 1,794 Posts Drives: 2007 e92 335i Join Date: Nov 2008 Location: Earth iTrader: (7)	I have noticed this too. I have tried speeding up my shifts but it only helps a little. Can't tell you if this is normal behavior.
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08-09-2010, 07:12 PM	#5
coh4777 Lieutenant 29 Rep 533 Posts Drives: 07 BMW 335i Coupe Join Date: Jul 2009 Location: Vegas iTrader: (0)	I find the trickiest shift is from 1st to 2nd in terms of managing the RPM drop. Are you experiencing problems while driving with the AC on full blast? That will definitely drop your RPM between shifts more so than usual. If all else fails, just shift slightly higher, at around 3500 RPM to get a smoother shift. __________________ COH4777 2007 335i Coupe - Jet Black / Coral Red / Aluminum Trim / 6MT / Sport / Premium / CA / Navi / iPod + USB
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08-09-2010, 07:55 PM	#9
JoeyBananaz18 Brigadier General 398 Rep 4,084 Posts Drives: metrocard Join Date: May 2009 Location: Whitestone, NY iTrader: (3)	the revs on the 335s drop notoriously fast. thats why alot of people tend to complain about how getting it into gear and the 1-2 shift is kinda rough. i say its totally normal. __________________ 7/18/09- I pick up my baby- 2009 E92 335i Xdrive, Space Gray over Coral Red. Premium Pkg, Cold Weather Pkg, M-Sport Pkg, 193Ms, Gloss Black grills, Custom Gloss Black Mirrors, Performance shift and E-brake boot, M3 spoiler, Euro fog switch, gloss black interior tim, Coco-Mats (red/black), H&R coilovers, 19'' Alufelgen SF-71s......
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08-09-2010, 10:12 PM	#10
fasternfaster go fast or go home 6 Rep 55 Posts Drives: '18 Tesla Model 3 Performance Join Date: May 2010 Location: Columbia MD iTrader: (0)	Its not the first time i read this.. but have any of you guys though about applying slight throttle pressure while shifting? I know you need to take your foot off the gas to granny shift this car, but if you give it just a "bit" to keep the revs from dropping, you can shift as slow as you like.. __________________ 2018 Tesla Model 3 Performance Blue/White 2008 e90 M3 6MT EDC/Premium/Cold/Nav Jerez/Black/Alum SOLD 2007 e90 335i 6MT Sport/Premium/Nav Blk/Blk/Alum SOLD
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08-09-2010, 11:46 PM	#11
2008E90TT Private 13 Rep 71 Posts Drives: E90 M3 Join Date: Apr 2010 Location: Texas iTrader: (1)	1st to 2nd is a bit tricky. I can nail it when I'm driving alone, but I tend to drive a bit aggressive and that's what I'm accustomed to. When I have to slow it down to keep passengers from complaining, I lose my rhythm and don't get a smooth shift every time. I have to rev match from 4th to 5th and 5th to 6th by tapping the gas with the clutch in. It's impossible to shift it quick enough to get a smooth transition in those gears unless I just want to jam it into gear and tear up the synchros. This is all with the A/C compressor on. It's not near as bad with it disengaged.
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