Not enough traction with JB4

bmwarg · 09-10-2016, 12:07 AM

In 1st / 2nd gear I get a lot of wheel spin. I'm using Michelin PSS, map 5 JB4 (about 14 psi boost). What do you recommend limiting the boost to? What else can I do to gain traction (as I'm not running anywhere close to the whp that others on this forum run)?

Thanks!

bigdaddyaaron · 09-10-2016, 12:11 AM

trial and error...

alexg212 · 09-10-2016, 12:52 AM

What temps? I hook pretty good on MPSS. Stock run flats, different story. I'm DCT though.

Brule · 09-10-2016, 03:18 AM

There must be something wrong in the rear to lose traction especially with good tyres.

Check your tyre pressure if its up near 40 maybe drop it to 36 or 34.

Have you got LSD?

You shouldnt have to worry about losing grip till you have upgraded turbos and inlets on e85 mixes

YoungBlood · 09-10-2016, 09:54 AM

uhh... get a new tire and wheel setup? lol you're making much more power than stock now, you're gonna need much more tire

Adambomb335 · 09-10-2016, 10:02 AM

I got a pair of 17in k1 wheels wheels with nitto radials. That will fix you right up.

Turbo_power4ever · 09-10-2016, 10:26 AM

Quote:

Originally Posted by Adambomb335

I got a pair of 17in k1 wheels wheels with nitto radials. That will fix you right up.

this is what I need. these nankangs ain't holding up. lol

Adambomb335 · 09-10-2016, 04:18 PM

Lol yea. I bet. Their for sale when your ready haha

Fundguy1 · 09-10-2016, 04:21 PM

Lsd, wider and or stickier tires.

Mike@N54Tuning.com · 09-10-2016, 05:15 PM

Try 9psi in 1st and 12psi in 2nd.

Mike

TrAcK TRaP · 09-10-2016, 05:37 PM

Quote:

Originally Posted by Brule

There must be something wrong in the rear to lose traction especially with good tyres.

Check your tyre pressure if its up near 40 maybe drop it to 36 or 34.

Have you got LSD?

You shouldnt have to worry about losing grip till you have upgraded turbos and inlets on e85 mixes

True. I am on 20+ psi with stock turbos and MPSS does just fine on 2nd gear. 1st is always problem we all know that..

bradsm87 · 09-10-2016, 07:17 PM

Wheel alignment! Factory toe spec with -1 degree camber is a good place to start.

Gohan335i7 · 09-10-2016, 09:46 PM

Limited Slip Diff will fix it.

bmwarg · 09-11-2016, 11:46 AM

Quote:

Originally Posted by N54CherryHill

True. I am on 20+ psi with stock turbos and MPSS does just fine on 2nd gear. 1st is always problem we all know that..

I can see if lower tire pressure helps. Might also try the suggestion on wheel alignment. What is your wheel alignment?

I don't have LSD. Is that something you have?

Sered · 09-11-2016, 01:09 PM

What size tires? MPSS isn't that great for straight-line grip, especially if you peg-leg

TrAcK TRaP · 09-11-2016, 03:25 PM

Quote:

Originally Posted by Sered

What size tires? MPSS isn't that great for straight-line grip, especially if you peg-leg

245/275..

TrAcK TRaP · 09-11-2016, 03:27 PM

Quote:

Originally Posted by bmwarg

I can see if lower tire pressure helps. Might also try the suggestion on wheel alignment. What is your wheel alignment?

I don't have LSD. Is that something you have?

No LSD. Running 245/275 tire pressures 34/37.. I had my wheel alignment done 3 months ago..

TrollToll · 09-11-2016, 03:53 PM

Quote:

Originally Posted by N54CherryHill

No LSD. Running 245/275 tire pressures 34/37.. I had my wheel alignment done 3 months ago..

Have you experimented with lower pressure in the rear tires?

TrAcK TRaP · 09-11-2016, 03:58 PM

Quote:

Originally Posted by Yournamehere90

Have you experimented with lower pressure in the rear tires?

I always play with tire pressures I just feel more comfortable with 34/37.

Fundguy1 · 09-11-2016, 10:57 PM

Quote:

Originally Posted by N54CherryHill

No LSD. Running 245/275 tire pressures 34/37.. I had my wheel alignment done 3 months ago..

Pressures are high. Should be 32-33ish. Back that hard lowers traction. The pressures should be what's on your door sill regardless of switching sizes or types of tires.

TrAcK TRaP · 09-11-2016, 11:03 PM

Quote:

Originally Posted by Fundguy1

Pressures are high. Should be 32-33ish. Back that hard lowers traction. The pressures should be what's on your door sill regardless of switching sizes or types of tires.

I dont wanna blow my motor like you did bro

TrAcK TRaP · 09-11-2016, 11:06 PM

Quote:

Originally Posted by Fundguy1

Pressures are high. Should be 32-33ish. Back that hard lowers traction. The pressures should be what's on your door sill regardless of switching sizes or types of tires.

By the way I had a chance to ride my friends 1000HP supra and I told him try to spin the tires at 70+mph he looked at me and said huh?

09-10-2016, 12:07 AM	#1
bmwarg Lieutenant 62 Rep 460 Posts Drives: 2008 E90 335i, 2012 E70 50i Join Date: Jun 2013 Location: Chicago, IL iTrader: (0)	Not enough traction with JB4 In 1st / 2nd gear I get a lot of wheel spin. I'm using Michelin PSS, map 5 JB4 (about 14 psi boost). What do you recommend limiting the boost to? What else can I do to gain traction (as I'm not running anywhere close to the whp that others on this forum run)? Thanks! __________________ 2008 E90 335i: JB4 G5 ISO \| BMS Pump Gas Backend Flash \| ER Charge Pipe \| n54Tuning DPs \| ETS FMIC
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09-10-2016, 12:11 AM	#2
bigdaddyaaron Private First Class 75 Rep 168 Posts Drives: 335i e90 Join Date: Mar 2015 Location: maryland iTrader: (0)	trial and error...
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09-10-2016, 12:52 AM	#3
alexg212 Second Lieutenant 52 Rep 278 Posts Drives: 335is Coupe/Mustang Gt Join Date: Oct 2013 Location: DFW iTrader: (0)	What temps? I hook pretty good on MPSS. Stock run flats, different story. I'm DCT though.
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09-10-2016, 03:18 AM	#4
Brule Brigadier General 827 Rep 3,189 Posts Drives: 2007 335i e92 6spd man Join Date: Jul 2013 Location: Darwin iTrader: (0)	There must be something wrong in the rear to lose traction especially with good tyres. Check your tyre pressure if its up near 40 maybe drop it to 36 or 34. Have you got LSD? You shouldnt have to worry about losing grip till you have upgraded turbos and inlets on e85 mixes
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09-10-2016, 09:54 AM	#5
YoungBlood LongDongSilver 274 Rep 706 Posts Drives: e90 335i Join Date: Mar 2016 Location: Utah iTrader: (2)	uhh... get a new tire and wheel setup? lol you're making much more power than stock now, you're gonna need much more tire __________________ N54 E90 6AT: 3" Pipes that go down, Thing that cools the inter, PE Mod, DCI, ST XTA, Whiteline bushings, Aodhan, and lotsa corn-juice
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09-10-2016, 10:02 AM	#6
Adambomb335 Private 9 Rep 68 Posts Drives: 335i Join Date: Apr 2016 Location: Jacksonville iTrader: (1)	I got a pair of 17in k1 wheels wheels with nitto radials. That will fix you right up.
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09-10-2016, 04:18 PM	#8
Adambomb335 Private 9 Rep 68 Posts Drives: 335i Join Date: Apr 2016 Location: Jacksonville iTrader: (1)	Lol yea. I bet. Their for sale when your ready haha
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09-10-2016, 04:21 PM	#9
Fundguy1 Major General 2032 Rep 8,339 Posts Drives: 335 e93 Join Date: Aug 2014 Location: Orlando, fl iTrader: (0)	Lsd, wider and or stickier tires.
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09-10-2016, 05:15 PM	#10
Mike@N54Tuning.com Joint Chiefs of Staff 4918 Rep 115,980 Posts Drives: 2007 335i, 2015 M3 Join Date: Dec 2008 Location: N54tuning.com iTrader: (89)	Try 9psi in 1st and 12psi in 2nd. Mike
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09-10-2016, 07:17 PM	#12
bradsm87 Lieutenant Colonel 595 Rep 1,693 Posts Drives: F25 LCI xDrive30d Join Date: Jun 2013 Location: Australia iTrader: (0)	Wheel alignment! Factory toe spec with -1 degree camber is a good place to start.
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09-10-2016, 09:46 PM	#13
Gohan335i7 Captain 312 Rep 766 Posts Drives: 335i Join Date: Nov 2015 Location: Florida iTrader: (0) Garage List 2010 335i [10.00]	Limited Slip Diff will fix it.
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09-11-2016, 01:09 PM	#15
Sered Major 146 Rep 1,201 Posts Drives: 08 E90 335i Join Date: Apr 2012 Location: Melbourne, FL iTrader: (3)	What size tires? MPSS isn't that great for straight-line grip, especially if you peg-leg __________________ '08 E90 w/ just boltons '09 Z4 sDrive35i w/ just boltons
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