2nd time driving since purchase.. 1st 1/4 time

Grand_hustle17 · 08-22-2015, 10:00 AM

Ok guys like the title said... This is my 1st time at the drag strip with this car but very familiar with 1/4'ing. Car is a 07 335i 6mt and has dual cone filters, ar charge pipe and jb4 on map 2 and map 5... At 1st i was shifting at redline then a fellow e90 friend said to shift at 6k... Car did 14.1 best time and best trap was 105.99... The mph i am ok with however i was expecting low 13's.. Seems there is a significant turbo lag or the car doesnt like fast shifting and jb4 just regulates power or something, im new to the platform and still learning to launch my 1st and only rwd and boosted car. Seems when i shift ill be back on the gas and the car doesnt even realise ive already shifted and back on the gas, right inbetween shift and back on the gas the car wont respond immediately instead the hazard wil flash once then the car gets going again. Not sure what that is about.

neverdone · 08-22-2015, 04:09 PM

Ya I'm pretty much stock and I did a 14.3 at 97mph so you should be doing way better. Mind you I'm auto and xDrive.

Grand_hustle17 · 08-22-2015, 10:11 PM

Yea thats low 13's/12's but i even flat shift some of the pulls and ive even managed a 14.0@100 out of my 6mt TL AND 13.7@101 With auto maxima but i just dont get it with this car. There is def a lag

E46driver · 09-01-2015, 03:22 PM

I thought the 335's optimal shift point was 5500. With all those mods you should definitely be doing better. Maybe the car has some issues under the bonnet and is holding back to protect your powertrain.

Cloud9blue · 09-02-2015, 10:18 AM

Quote:

Originally Posted by E46driver

I thought the 335's optimal shift point was 5500. With all those mods you should definitely be doing better. Maybe the car has some issues under the bonnet and is holding back to protect your powertrain.

Peak power is probably at 5800rpm for most tunes on stock turbos and stock inlets. But you should shift a bit later than that (approx. 6200rpm), so that the car stays in the power band after the shift.

Quote:

Originally Posted by Grand_hustle17

Ok guys like the title said... This is my 1st time at the drag strip with this car but very familiar with 1/4'ing. Car is a 07 335i 6mt and has dual cone filters, ar charge pipe and jb4 on map 2 and map 5... At 1st i was shifting at redline then a fellow e90 friend said to shift at 6k... Car did 14.1 best time and best trap was 105.99... The mph i am ok with however i was expecting low 13's.. Seems there is a significant turbo lag or the car doesnt like fast shifting and jb4 just regulates power or something, im new to the platform and still learning to launch my 1st and only rwd and boosted car. Seems when i shift ill be back on the gas and the car doesnt even realise ive already shifted and back on the gas, right inbetween shift and back on the gas the car wont respond immediately instead the hazard wil flash once then the car gets going again. Not sure what that is about.

You need to log... My guess is that your tune isn't dialed in and suffer from the common post shift timing flat-lining. Spend some time on N54tech.com

Grand_hustle17 · 09-07-2015, 08:12 AM

I have been... I have a few logs since then

jtswole · 09-08-2015, 11:18 AM

It's a timing issue between shifts, causing boost to have to come back up to peak boost. Also, make sure you take your foot all the way off the pedal when shifting. Accel pedal should read 0%

Grand_hustle17 · 11-13-2015, 11:05 PM

Smh... In this post there were few issues... Dying fuel pump, 3cyl misfires, 1 blown coil...

Cory S · 01-04-2016, 04:18 PM

ET is all based on your short time. (60')...

Without listing what your 60' ET is, nobody can guess what needs to be worked on.....

You ran 106mph trap. Not bad at all. With lets say a 1.85 60', your ET would have been close to 13.2-13.4 on an ideal pass. Guessing your 60' was around 2.15-2.3?

08-22-2015, 10:00 AM	#1
Grand_hustle17 Major 192 Rep 1,173 Posts Drives: E90 335i Join Date: Aug 2015 Location: Maryland iTrader: (0)	2nd time driving since purchase.. 1st 1/4 time Ok guys like the title said... This is my 1st time at the drag strip with this car but very familiar with 1/4'ing. Car is a 07 335i 6mt and has dual cone filters, ar charge pipe and jb4 on map 2 and map 5... At 1st i was shifting at redline then a fellow e90 friend said to shift at 6k... Car did 14.1 best time and best trap was 105.99... The mph i am ok with however i was expecting low 13's.. Seems there is a significant turbo lag or the car doesnt like fast shifting and jb4 just regulates power or something, im new to the platform and still learning to launch my 1st and only rwd and boosted car. Seems when i shift ill be back on the gas and the car doesnt even realise ive already shifted and back on the gas, right inbetween shift and back on the gas the car wont respond immediately instead the hazard wil flash once then the car gets going again. Not sure what that is about. __________________ 02 A33 6mt maxima- sold (toy) 04 UA6 Acura TL- sold (my reliable baby) 07 N54 335i- the new adventure (i think)
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08-22-2015, 04:09 PM	#2
neverdone Major 327 Rep 1,397 Posts Drives: X5, 335, Ford Lightning, 63 me Join Date: Jun 2014 Location: calgary iTrader: (0)	Ya I'm pretty much stock and I did a 14.3 at 97mph so you should be doing way better. Mind you I'm auto and xDrive.
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08-22-2015, 10:11 PM	#3
Grand_hustle17 Major 192 Rep 1,173 Posts Drives: E90 335i Join Date: Aug 2015 Location: Maryland iTrader: (0)	Yea thats low 13's/12's but i even flat shift some of the pulls and ive even managed a 14.0@100 out of my 6mt TL AND 13.7@101 With auto maxima but i just dont get it with this car. There is def a lag
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09-01-2015, 03:22 PM	#4
E46driver Captain 78 Rep 739 Posts Drives: 2009 E92 N51 328i Join Date: Jan 2012 Location: Rowland Heights iTrader: (4)	I thought the 335's optimal shift point was 5500. With all those mods you should definitely be doing better. Maybe the car has some issues under the bonnet and is holding back to protect your powertrain. __________________ 2009 Alpine White E92 N51 328i Automagic \| Premium & Sport Pkg. \| Coral Red/Black Dakota Leather Interior \| M-Spor \| BMW Performance Exhaust \| Active Autowerke Headers \| BBS CH-R \| CPS Front Lip \| Performance Front Grills \| 888Concepts Custom Headlights (GONE) 2011 Alpine White E90 N55 335i Automagic
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09-07-2015, 08:12 AM	#6
Grand_hustle17 Major 192 Rep 1,173 Posts Drives: E90 335i Join Date: Aug 2015 Location: Maryland iTrader: (0)	I have been... I have a few logs since then __________________ 02 A33 6mt maxima- sold (toy) 04 UA6 Acura TL- sold (my reliable baby) 07 N54 335i- the new adventure (i think)
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09-08-2015, 11:18 AM	#7
jtswole First Lieutenant 42 Rep 380 Posts Drives: 335i Join Date: Mar 2014 Location: FL iTrader: (1)	It's a timing issue between shifts, causing boost to have to come back up to peak boost. Also, make sure you take your foot all the way off the pedal when shifting. Accel pedal should read 0%
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11-13-2015, 11:05 PM	#8
Grand_hustle17 Major 192 Rep 1,173 Posts Drives: E90 335i Join Date: Aug 2015 Location: Maryland iTrader: (0)	Smh... In this post there were few issues... Dying fuel pump, 3cyl misfires, 1 blown coil...
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01-04-2016, 04:18 PM	#9
Cory S Major 305 Rep 1,163 Posts Drives: 2011 335i-X Join Date: Oct 2015 Location: N.H. iTrader: (0)	ET is all based on your short time. (60')... Without listing what your 60' ET is, nobody can guess what needs to be worked on..... You ran 106mph trap. Not bad at all. With lets say a 1.85 60', your ET would have been close to 13.2-13.4 on an ideal pass. Guessing your 60' was around 2.15-2.3?
	Appreciate 0 Quote