Suspension mods to improve hard/drag launches?

iqraceworks · 11-26-2019, 11:35 AM

With all the power that these N54's are able to put down pretty easily.....it seems like the 335i's just never "hook up" very well when trying to launch them hard (talking about the RWD models).

I've seen the diff braces that help to stiffen things up.....and swapping in an M3 LSD is a must, but are there any companies making aftermarket suspension component that aid in transferring weight to the rear of the car in order to make them hook up better??

Mustangs, Camaros, Vetts, GTO's,etc, etc all seem to have some good options for getting the rear suspension set up for hard launches at the drag strip.

Is there anyone out there making parts like that for the 335i's? I'm sure the IRS setup makes it a little more difficult compared to a solid axle....

type-dRew · 11-26-2019, 11:56 AM

Silent11N54 has it down pretty good, fairly sure sticky tires and a 2nd gear launch(if automatic) is all you need.

Or just do it every time on the street with wore down run flat all seasons with an xdrive instead, lmao

iqraceworks · 11-26-2019, 11:57 AM

Quote:

Originally Posted by type-dRew

Silent11N54 has it down pretty good, fairly sure sticky tires and a 2nd gear launch(if automatic) is all you need.

How long do those ZF 6 speed autos last doing boosted 2ns gear launches with sticky tires?

type-dRew · 11-26-2019, 11:59 AM

These are extremely stout transmissions, one of the main reasons I bought my car is because I knew the driveline was stout.

Keep good fluid in it, maybe some fresh solenoids and im sure you'll never have an issue. Log your trans temps and lay off it over 210 degrees.

Wingnutts · 11-26-2019, 12:10 PM

Quote:

Originally Posted by iqraceworks

How long do those ZF 6 speed autos last doing boosted 2ns gear launches with sticky tires?

And that is why I've only used launch control on my dct is once.

type-dRew · 11-26-2019, 12:17 PM

Quote:

Originally Posted by Wingnutts

And that is why I've only used launch control on my dct is once.

I love the DCT cars but i'd trust it way less than the torque converter ZF auto. Mine takes an absolute beating with a completely unknown maintenance history.

Silent9n54 · 11-26-2019, 06:38 PM

Quote:

Originally Posted by iqraceworks

How long do those ZF 6 speed autos last doing boosted 2ns gear launches with sticky tires?

i have had around 80 passes in the last 2 years with no issues with the transmission, no fluid change either , 120.000 miles on the clock

new fluids going in this off season

11-26-2019, 11:35 AM	#1
iqraceworks Brigadier General 2088 Rep 3,809 Posts Drives: 2007 335i Join Date: Aug 2019 Location: Missouri iTrader: (0)	Suspension mods to improve hard/drag launches? With all the power that these N54's are able to put down pretty easily.....it seems like the 335i's just never "hook up" very well when trying to launch them hard (talking about the RWD models). I've seen the diff braces that help to stiffen things up.....and swapping in an M3 LSD is a must, but are there any companies making aftermarket suspension component that aid in transferring weight to the rear of the car in order to make them hook up better?? Mustangs, Camaros, Vetts, GTO's,etc, etc all seem to have some good options for getting the rear suspension set up for hard launches at the drag strip. Is there anyone out there making parts like that for the 335i's? I'm sure the IRS setup makes it a little more difficult compared to a solid axle.... __________________ 2007 335i, BMS DCI, BMS Chargepipe w/Tial BOV, ARM Catless Downpipes, silicone inlets, Bilstein B12 Prokit Suspension, Whiteline subframe bushings, Front/Rear M3 control arms, G-Plus FMIC, Stage 2 LPFP, Custom E40 tune by Justin (V8Bait), xHP stage 3 transmission flash, RB Two Turbos....10.90 @ 128mph
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11-26-2019, 11:56 AM	#2
type-dRew Major 642 Rep 1,245 Posts Drives: 2009 335i xDrive Join Date: Feb 2019 Location: Newport MI iTrader: (0)	Silent11N54 has it down pretty good, fairly sure sticky tires and a 2nd gear launch(if automatic) is all you need. Or just do it every time on the street with wore down run flat all seasons with an xdrive instead, lmao __________________ 2009 335i xDrive AT / 177k+ miles PSP 750ic / Fuel-It! Stage 1 / BMS CP / Sutphin Tuning / RFP E50 11.61 @ 117.5 New setup; Covid 19Ts on RFP 93 + ARM inlets, dp, VTT cp and PSP outlets
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11-26-2019, 11:59 AM	#4
type-dRew Major 642 Rep 1,245 Posts Drives: 2009 335i xDrive Join Date: Feb 2019 Location: Newport MI iTrader: (0)	These are extremely stout transmissions, one of the main reasons I bought my car is because I knew the driveline was stout. Keep good fluid in it, maybe some fresh solenoids and im sure you'll never have an issue. Log your trans temps and lay off it over 210 degrees. __________________ 2009 335i xDrive AT / 177k+ miles PSP 750ic / Fuel-It! Stage 1 / BMS CP / Sutphin Tuning / RFP E50 11.61 @ 117.5 New setup; Covid 19Ts on RFP 93 + ARM inlets, dp, VTT cp and PSP outlets
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