JB4 2nd gear max boost

BMSE92_Harry · 01-03-2016, 12:55 AM

I just flashed with Jb4 backend MHD e60. I turned off the 2nd gear max boost and the car from 2nd gear went to tranny malfunction, probably slipped. Luckily I restarted the car and it was fine.

What is the max 2nd gear boost you guys have it on?

08 auto. Car is alpina flash, Dci, Catless DP, JB4, RB inlets, MHD E60, Walboro 450.

BMSE92_Harry · 01-03-2016, 06:19 PM

Anyone?

Mike@N54Tuning.com · 01-03-2016, 07:04 PM

Most on street tires run 10psi in 1st and 14psi in 2nd, I think.

Mike

BMSE92_Harry · 01-03-2016, 08:54 PM

Thanks for the input.

Antetokounmpo · 01-03-2016, 08:56 PM

Why not try different limits and see what works best for your setup?

BMSE92_Harry · 01-04-2016, 02:27 AM

I'm experimenting with it right now. But the tranny def won't hold the power torque load in 2nd, I'm afraid to push it too hard and really messed it up.
The malfunction really scared me as the car wouldn't drive, had to stop the car and turned it off and on on the side of the road, luckily it worked after.

mike@x-ph.com · 01-04-2016, 04:21 PM

Start with 8 psi and work your way up

01-03-2016, 12:55 AM	#1
BMSE92_Harry Captain 77 Rep 811 Posts Drives: 08 335i coupe Join Date: Oct 2013 Location: Tampa iTrader: (0)	JB4 2nd gear max boost I just flashed with Jb4 backend MHD e60. I turned off the 2nd gear max boost and the car from 2nd gear went to tranny malfunction, probably slipped. Luckily I restarted the car and it was fine. What is the max 2nd gear boost you guys have it on? 08 auto. Car is alpina flash, Dci, Catless DP, JB4, RB inlets, MHD E60, Walboro 450.
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01-03-2016, 06:19 PM	#2
BMSE92_Harry Captain 77 Rep 811 Posts Drives: 08 335i coupe Join Date: Oct 2013 Location: Tampa iTrader: (0)	Anyone?
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01-03-2016, 07:04 PM	#3
Mike@N54Tuning.com Joint Chiefs of Staff 5098 Rep 116,225 Posts Drives: 2007 335i, 2015 M3 Join Date: Dec 2008 Location: N54tuning.com iTrader: (89)	Most on street tires run 10psi in 1st and 14psi in 2nd, I think. Mike
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01-03-2016, 08:54 PM	#4
BMSE92_Harry Captain 77 Rep 811 Posts Drives: 08 335i coupe Join Date: Oct 2013 Location: Tampa iTrader: (0)	Thanks for the input.
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01-03-2016, 08:56 PM	#5
Antetokounmpo Brigadier General 1560 Rep 3,475 Posts Drives: E90 6MT FBO; '18 F150 Platinum Join Date: Jul 2013 Location: WI iTrader: (3) Garage List 2018 Ford F-150 Pla ... [0.00] 2008 BMW 335xi [0.00]	Why not try different limits and see what works best for your setup? __________________ 2008 335xi 6MT \| VRSF Catless DP \| VRSF 7" FMIC \| VRSF CP \| TIAL BOV \| DCI \| MHD 2+ BC Racing BR \| Stoptech 600 \| Firehawk Indy 500 255 Square \| Atric Altimax 225 Sq. 2018 F-150 Platinum 701A \| FX4 \| 3.5 EcoBeast
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01-04-2016, 02:27 AM	#6
BMSE92_Harry Captain 77 Rep 811 Posts Drives: 08 335i coupe Join Date: Oct 2013 Location: Tampa iTrader: (0)	I'm experimenting with it right now. But the tranny def won't hold the power torque load in 2nd, I'm afraid to push it too hard and really messed it up. The malfunction really scared me as the car wouldn't drive, had to stop the car and turned it off and on on the side of the road, luckily it worked after.
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01-04-2016, 04:21 PM	#7
mike@x-ph.com BimmerPost Supporting Vendor 28741 Rep 198,934 Posts Drives: 07-335/12-328/18-M4/21-M4CP Join Date: Sep 2013 Location: Las Vegas iTrader: (23)	Start with 8 psi and work your way up __________________ Check out our current sale by clicking on this link! https://x-ph.com/sale/ Phone number 702-494-9435
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