Is this turbo lag I'm experiencing?

r!der · 04-30-2009, 01:35 PM

335i Sedan 6MT

Recently installed JB+

Just want to know if what I'm experiencing is turbo lag.
One of my buddies thought it was the clutch slipping at first.

Feel it most in 3rd, 4th and 5th gear.
With the RPM's around 2800 or so, full throttle...the RPM climbs pretty fast (about 1K RPM), then drops a couple hundred and then the power comes on strong. Car seems to "shiver" with the initial climb. Almost feels like slippage, which is why my buddy thought it was the clutch going.

I searched and I'm STILL reading the 29.2 lag thread

, but couldn't really find too much on the symptoms.

Is THIS turbo lag?

thegeneral101 · 04-30-2009, 01:40 PM

hmmm doesn't really sounds like turbo lag

inthemiddle · 04-30-2009, 01:42 PM

Quote:

Originally Posted by r!der

Almost feels like slippage, which is why my buddy thought it was the clutch going.

be nicer to your clutch... or get a flappy paddle next time and you don't have to worry about the clutch..... ... as it is... i'd bet your buddy is right... sorry...

Jimspeed · 04-30-2009, 01:45 PM

yea.. sounds like clutch to me

turbo lag is more like..you step on it and there is sorta of a delay as the rev's increase then the power hits.

kyleb350 · 04-30-2009, 01:48 PM

Quote:

Originally Posted by r!der

Feel it most in 3rd, 4th and 5th gear.
With the RPM's around 2800 or so, full throttle...the RPM climbs pretty fast (about 1K RPM), then drops a couple hundred and then the power comes on strong. Car seems to "shiver" with the initial climb. Almost feels like slippage, which is why my buddy thought it was the clutch going.

your RPMs drop at full throttle?

r!der · 04-30-2009, 01:51 PM

Quote:

Originally Posted by kyleb350

your RPMs drop at full throttle?

Yes, might have exaggerated a bit, but the needle will momentarily stop climbing and will dip(stutter) slightly before going back up.

Mote · 04-30-2009, 01:55 PM

Your clutch is going. Sorry.

r!der · 04-30-2009, 02:06 PM

Crap.

I was afraid of that. Previous owner must have been a shitty 6MT driver.

What would really suck is if I replace the clutch and experience the same prob.

Think I can get the clutch replaced under warranty?

Ghines1279 · 04-30-2009, 02:08 PM

when you are going like 20mph, put it into 6th and floor it. If it goes to redline and the car does't accell then its your clutch. Sounds like a fuel pump to me though.

r!der · 04-30-2009, 02:14 PM

Quote:

Originally Posted by Ghines1279

when you are going like 20mph, put it into 6th and floor it. If it goes to redline and the car does't accell then its your clutch. Sounds like a fuel pump to me though.

Got a new fuel pump last weekend!

RambleJ · 04-30-2009, 03:18 PM

Quote:

Originally Posted by Ghines1279

when you are going like 20mph, put it into 6th and floor it. If it goes to redline and the car does't accell then its your clutch. Sounds like a fuel pump to me though.

Does not sound like a fuel pump issue.

JoosyJoos · 04-30-2009, 04:25 PM

How many miles are on the car?

r!der · 04-30-2009, 04:44 PM

38,xxx

Ilma · 04-30-2009, 05:06 PM

If the clutch was slipping I would think that the rpm's would climb higher without the car pulling along.

You say they drop, so it sounds like something else is going on.

You should give Terry a shout to troubleshoot.

PS...you wouldn't be the first to get several fuel pumps in a row.

TurboBimmer · 04-30-2009, 05:16 PM

I'd say it's the clutch. Had this on my E46 320d at 80k kms.

Mike@N54Tuning.com · 04-30-2009, 06:46 PM

Could be clutch or Fuel Pump. Any way to get it scanned to see if there are any fuel pump codes?

I would to that 5th/6th gear at 20MPH and floor it to test for clutch slippage.

Mike

r!der · 04-30-2009, 09:32 PM

Ok, tried it and it didn't slip in 5th or 6th.
I'm going to run the scan and see what it shows.

iScream · 05-01-2009, 09:23 AM

check for caked intake valves.

the drop in rpm is NOT a characteristic of the 29.2 lag.

04-30-2009, 01:35 PM	#1
r!der Private First Class 12 Rep 102 Posts Drives: 07 BMW 335i Join Date: Apr 2009 Location: SoCal iTrader: (1)	Is this turbo lag I'm experiencing? 335i Sedan 6MT Recently installed JB+ Just want to know if what I'm experiencing is turbo lag. One of my buddies thought it was the clutch slipping at first. Feel it most in 3rd, 4th and 5th gear. With the RPM's around 2800 or so, full throttle...the RPM climbs pretty fast (about 1K RPM), then drops a couple hundred and then the power comes on strong. Car seems to "shiver" with the initial climb. Almost feels like slippage, which is why my buddy thought it was the clutch going. I searched and I'm STILL reading the 29.2 lag thread, but couldn't really find too much on the symptoms. Is THIS turbo lag?
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04-30-2009, 01:40 PM	#2
thegeneral101 Colonel 76 Rep 2,304 Posts Drives: '15 Z06,'13 750Li,'11 Raptor Join Date: Nov 2006 Location: Miami/Michigan iTrader: (0)	hmmm doesn't really sounds like turbo lag __________________
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04-30-2009, 01:45 PM	#4
Jimspeed Private First Class 3 Rep 177 Posts Drives: 08 335i Join Date: Aug 2008 Location: MD iTrader: (1)	yea.. sounds like clutch to me turbo lag is more like..you step on it and there is sorta of a delay as the rev's increase then the power hits.
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04-30-2009, 01:55 PM	#7
Mote Colonel 138 Rep 2,162 Posts Drives: 2008 E92 - 1991 E30 Join Date: Jan 2008 Location: Beverly Hills, CA iTrader: (0)	Your clutch is going. Sorry.
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04-30-2009, 02:06 PM	#8
r!der Private First Class 12 Rep 102 Posts Drives: 07 BMW 335i Join Date: Apr 2009 Location: SoCal iTrader: (1)	Crap. I was afraid of that. Previous owner must have been a shitty 6MT driver.What would really suck is if I replace the clutch and experience the same prob. Think I can get the clutch replaced under warranty?
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04-30-2009, 02:08 PM	#9
Ghines1279 Second Lieutenant 7 Rep 238 Posts Drives: F30 335i Join Date: Mar 2009 Location: SAN DIEGO! iTrader: (5) Garage List 2007 e92 335i [0.00]	when you are going like 20mph, put it into 6th and floor it. If it goes to redline and the car does't accell then its your clutch. Sounds like a fuel pump to me though.
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04-30-2009, 04:25 PM	#12
JoosyJoos Major 113 Rep 1,347 Posts Drives: 2011 335d Join Date: Apr 2007 Location: Atlanta, GA iTrader: (1) Garage List 2008 BMW 335i [0.00]	How many miles are on the car? __________________ 1997 M3 Coupe - BMWCCA I-Prepared #22 2006 M Roadster - 23,000 miles and slowly counting
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04-30-2009, 04:44 PM	#13
r!der Private First Class 12 Rep 102 Posts Drives: 07 BMW 335i Join Date: Apr 2009 Location: SoCal iTrader: (1)	38,xxx
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04-30-2009, 05:06 PM	#14
Ilma Colonel 184 Rep 2,841 Posts Drives: 2008 135i Join Date: Nov 2008 Location: Mississauga iTrader: (0)	If the clutch was slipping I would think that the rpm's would climb higher without the car pulling along. You say they drop, so it sounds like something else is going on. You should give Terry a shout to troubleshoot. PS...you wouldn't be the first to get several fuel pumps in a row.
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04-30-2009, 05:16 PM	#15
TurboBimmer Lieutenant Colonel 79 Rep 1,617 Posts Drives: F82 M4 Join Date: Mar 2009 Location: Luxembourg iTrader: (5)	I'd say it's the clutch. Had this on my E46 320d at 80k kms. __________________ Performance Seats, Exhaust, Splitters, Pedals, Steering Wheel / RB Turbos / M3 CF Roof / Brembo GT BBK 355/345 / Rollcage / Forge FMIC / Quaife LSD / Öhlins Road & Track / M3 Suspension Parts / Solid Subframe Bushings / Vorshlag Camberplates / Megan Racing Toe Links / LeatherZ Gauges / Extended M3 DCT Paddles / ER Sports OC / AR OC / Aux Radiator / AR DPs / Alpina TCU / COBB Pro-Tune
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04-30-2009, 06:46 PM	#16
Mike@N54Tuning.com Joint Chiefs of Staff 4920 Rep 115,999 Posts Drives: 2007 335i, 2015 M3 Join Date: Dec 2008 Location: N54tuning.com iTrader: (89)	Could be clutch or Fuel Pump. Any way to get it scanned to see if there are any fuel pump codes? I would to that 5th/6th gear at 20MPH and floor it to test for clutch slippage. Mike
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04-30-2009, 09:32 PM	#17
r!der Private First Class 12 Rep 102 Posts Drives: 07 BMW 335i Join Date: Apr 2009 Location: SoCal iTrader: (1)	Ok, tried it and it didn't slip in 5th or 6th. I'm going to run the scan and see what it shows.
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05-01-2009, 09:23 AM	#18
iScream solid @ 153, no, 155mph! 15 Rep 335 Posts Drives: '07/'09/'13 335, '16 340ix Join Date: May 2008 Location: Washington, DC iTrader: (0)	check for caked intake valves. the drop in rpm is NOT a characteristic of the 29.2 lag.
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