JB4 map 5 help please

Vince1219 · 07-15-2015, 10:08 AM

So last night I had about 7 passes, car was running cool around 220... Half a tank 93 with 2 gallons of e85. The was running amazing! But north of 130 getting to 140 my car will basically put me into a safety mode and will basically stop my momentum... Any idea why?? I figured with the jb4 tube that wouldn't happen, any help please?

Antetokounmpo · 07-15-2015, 10:20 AM

North of 130mph? This wasn't the 1/4 mile I assume..

You're probably hitting the speed limiter which feels like you're hitting a wall around 135mph. If you do a backend flash through MHD it gets rid of the speed limiter.. ask me how I know.

Vince1219 · 07-15-2015, 10:23 AM

Quote:

Originally Posted by bk335

North of 130mph? This wasn't the 1/4 mile I assume..

You're probably hitting the speed limiter which feels like you're hitting a wall around 135mph. If you do a backend flash through MHD it gets rid of the speed limiter.. ask me how I know.

But it only happens sometimes... It's so weird I've done 150+ before on mile runs.. MHD backend flash?

Antetokounmpo · 07-15-2015, 10:47 AM

JB4 doesn't go into safety mode until the oil temp is 270.

Jeff@TopGearSolutions · 07-15-2015, 10:49 AM

How many miles on car and current spark plugs?

Have you logged your low pressure fuel recently?

No codes? Oil temp may be good, how about the coolant temp?

csu87 · 07-15-2015, 10:50 AM

Didn't you make this exact same thread yesterday?

I'm guessing heat soak still. 7 pulls and speeds up to 130 is going too work those turbo hard

Vince1219 · 07-15-2015, 10:51 AM

Quote:

Originally Posted by bk335

JB4 doesn't go into safety mode until the oil temp is 270.

I was running there all night

Vince1219 · 07-15-2015, 10:52 AM

Quote:

Originally Posted by Jeff@TopGearSolutions

How many miles on car and current spark plugs?

Have you logged your low pressure fuel recently?

76k and on Monday had a oil change and brand new spark plugs

Vince1219 · 07-15-2015, 10:57 AM

Quote:

Originally Posted by bk335

JB4 doesn't go into safety mode until the oil temp is 270.

There sorry

benton0311 · 07-15-2015, 11:16 AM

What is the boost safety setting at? It could be set under 18 psi or could be at 18 psi and boost overshoots it's target momentarily due to the extremely high load. I believe Map 5 autotune can run up to 17 psi and would probably see that with some E85 so a momentary overshoot to 18 psi sounds plausible.

Antetokounmpo · 07-15-2015, 11:39 AM

Quote:

Originally Posted by benton0311

What is the boost safety setting at? It could be set under 18 psi or could be at 18 psi and boost overshoots it's target momentarily due to the extremely high load. I believe Map 5 autotune can run up to 17 psi and would probably see that with some E85 so a momentary overshoot to 18 psi sounds plausible.

Map 5 will hit 18psi, he's on about E25 which should be able to max map 5 out at 18psi. If boost failsafe is 17psi, if I'm not mistaken, map 5 will just go to 17 then.

csu87 · 07-15-2015, 11:44 AM

Only way to know for sure is to post logs. Without that, no one can tell you what the issue is

mike@x-ph.com · 07-15-2015, 12:02 PM

You need logs or codes (if available) or else it will be very hard to figure it out

Mike@N54Tuning.com · 07-15-2015, 12:14 PM

Quote:

Originally Posted by mike@x-ph.com

You need logs or codes (if available) or else it will be very hard to figure it out

+1

Mike

Billit335 · 07-15-2015, 11:08 PM

Bump stop holding out !!

Vince1219 · 07-15-2015, 11:11 PM

Quote:

Originally Posted by Billit335

Bump stop holding out !!

I don't have any logs

:

Antetokounmpo · 07-16-2015, 10:13 AM

Quote:

Originally Posted by Vince1219

I don't have any logs

:

then do some logs..

Vince1219 · 07-16-2015, 10:15 AM

Quote:

Originally Posted by bk335

Quote:

Originally Posted by Vince1219

I don't have any logs

:

then do some logs..

Idk how to

csu87 · 07-16-2015, 10:24 AM

Google it then come back and post the logs

Jeff@TopGearSolutions · 07-16-2015, 10:35 AM

Quote:

Originally Posted by Vince1219

Idk how to

The information is publically available here: HOW TO DATALOG JB4

Vince1219 · 07-16-2015, 10:41 AM

Quote:

Originally Posted by Jeff@TopGearSolutions

Quote:

Originally Posted by Vince1219

Idk how to

The information is publically available here: HOW TO DATALOG JB4

Thanks

07-15-2015, 10:08 AM	#1
Vince1219 Private First Class 18 Rep 187 Posts Drives: 2008 335i Join Date: Jun 2015 Location: Hollywood, FL iTrader: (0)	JB4 map 5 help please So last night I had about 7 passes, car was running cool around 220... Half a tank 93 with 2 gallons of e85. The was running amazing! But north of 130 getting to 140 my car will basically put me into a safety mode and will basically stop my momentum... Any idea why?? I figured with the jb4 tube that wouldn't happen, any help please?
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07-15-2015, 10:20 AM	#2
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]	North of 130mph? This wasn't the 1/4 mile I assume.. You're probably hitting the speed limiter which feels like you're hitting a wall around 135mph. If you do a backend flash through MHD it gets rid of the speed limiter.. ask me how I know. __________________ 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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07-15-2015, 10:47 AM	#4
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]	JB4 doesn't go into safety mode until the oil temp is 270. __________________ 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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07-15-2015, 10:49 AM	#5
Jeff@TopGearSolutions 3474 Rep 79,211 Posts Drives: C6 Z06, 09 335i, 10 335xi Join Date: Dec 2008 Location: www.TopGearSolutions.com iTrader: (37)	How many miles on car and current spark plugs? Have you logged your low pressure fuel recently? No codes? Oil temp may be good, how about the coolant temp?
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07-15-2015, 10:50 AM	#6
csu87 Banned 2130 Rep 3,553 Posts Drives: 09 335xi Join Date: Nov 2013 Location: Northern Colorado iTrader: (0)	Didn't you make this exact same thread yesterday? I'm guessing heat soak still. 7 pulls and speeds up to 130 is going too work those turbo hard
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07-15-2015, 11:16 AM	#10
benton0311 Lance Corporal 19 Rep 128 Posts Drives: 08 335i, Graphite Join Date: Nov 2007 Location: Maryland iTrader: (1)	What is the boost safety setting at? It could be set under 18 psi or could be at 18 psi and boost overshoots it's target momentarily due to the extremely high load. I believe Map 5 autotune can run up to 17 psi and would probably see that with some E85 so a momentary overshoot to 18 psi sounds plausible.
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07-15-2015, 11:44 AM	#12
csu87 Banned 2130 Rep 3,553 Posts Drives: 09 335xi Join Date: Nov 2013 Location: Northern Colorado iTrader: (0)	Only way to know for sure is to post logs. Without that, no one can tell you what the issue is
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07-15-2015, 12:02 PM	#13
mike@x-ph.com BimmerPost Supporting Vendor 27327 Rep 196,604 Posts Drives: 07-335/12-328/18-M4/21-M4CP Join Date: Sep 2013 Location: Las Vegas iTrader: (23)	You need logs or codes (if available) or else it will be very hard to figure it out __________________ Check out our current sale by clicking on this link! https://x-ph.com/sale/ Phone number 702-494-9435
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07-15-2015, 11:08 PM	#15
Billit335 Private First Class 35 Rep 152 Posts Drives: 07 335 Join Date: Aug 2014 Location: Texas iTrader: (1)	Bump stop holding out !!
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07-16-2015, 10:24 AM	#19
csu87 Banned 2130 Rep 3,553 Posts Drives: 09 335xi Join Date: Nov 2013 Location: Northern Colorado iTrader: (0)	Google it then come back and post the logs
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