JB4tech.com - International Turbo Tuning Discussion
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FlooF FlooF is offline
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Default G70 Map5 - Overboosting and Car going into Limp Mode - 03-06-2020, 09:15 AM

Car: G70 3.3T - JB4 v13 - BMS Intakes - Denso Plugs - E30 Blend - Map5 - Overboost protection set to 20PSI. The Rest of the car is stock.

Situation: On hard pulls, I will notice boost goes into the 21-22 PSI range. Upon this happening, the JB4 will go into map0 and the turbos will "shut off". I then have to power cycle the car to get the turbo's to come back on and continue on my drive. It is difficult for me to log this as it doesn't happen all the time, but it has happened at least 5 times in the last month or so.

My Questions: Is the car "turning the turbos off" or is the JB4? If it is the JB4, can I turn the boost safety up to 22PSI without damage to the engine?

I love Map5 as getting to 20 PSI is really a major difference then 16/17 in map2/3. I hope the solution is not to put it in Map3.

Last edited by FlooF; 03-06-2020 at 09:17 AM.. Reason: Spelled the title wrong.
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Payam @ BMS's Avatar
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Default 03-06-2020, 09:38 AM

Log?


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FlooF FlooF is offline
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Default 03-06-2020, 10:00 AM

Quote:
Originally Posted by Payam @ BMS
Log?
Did you read my post? It is difficult to get a log as it doesn't happen all the time. It has happened about 5 times in the last month or so and I am not just always logging every drive I do.

Instead of just putting one word question "Log?". Maybe helping me answer my questions would help understand the issue and maybe just resolve it without needing a log.

Is there an option to consistently log? I will attempt to recreate the scenarios where I have noticed this happening and log it.

Last edited by FlooF; 03-06-2020 at 10:01 AM.. Reason: Needed to add something.
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FlooF FlooF is offline
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Default 03-06-2020, 11:32 AM

I went out today to get lunch, I was not able to recreate it today as it normally happens on extended driving 1.5 hours +. But I did log some map5 pulls.

I did however find a screenshot in my phone(shows max boost of 21.1) of the jb4 app after one of the pulls that caused the car to go limp.

Attached are both.
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File Type: csv 2020-03-06 12_46_29_Map-5.csv (38.2 KB, 148 views)
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Payam @ BMS's Avatar
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Default 03-06-2020, 11:59 AM

Quote:
Originally Posted by FlooF
Did you read my post? It is difficult to get a log as it doesn't happen all the time. It has happened about 5 times in the last month or so and I am not just always logging every drive I do.

Instead of just putting one word question "Log?". Maybe helping me answer my questions would help understand the issue and maybe just resolve it without needing a log.

Is there an option to consistently log? I will attempt to recreate the scenarios where I have noticed this happening and log it.
A log is worth a thousand words to us. Looks like that boost safety is your issue as you described. You can raise that to 22 psi.

Unfortunately as you're unable to recreate that scenario in a log, it's hard to evaluate and say exactly what's happening.
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Burger Motorsports
Home of the Worlds fastest N20s, N54s, N55s, S55s, N63s, and S63s!

It is the sole responsibility of the purchaser and installer of any BMS part to employ the correct installation techniques required to ensure the proper operation of BMS parts, and BMS disclaims any and all liability for any part failure due to improper installation or use. It is the sole responsibility of the customer to verify that the use of their vehicle and items purchased comply with federal, state and local regulations. BMS claims no legal federal, state or local certification concerning pollution controlled motor vehicles or mandated emissions requirements. BMS products labeled for use only in competition racing vehicles may only be used on competition racing vehicles operated exclusively on a closed course in conjunction with a sanctioned racing event, in accordance with all federal and state laws, and may never be operated on public roads/highways. Please click here for more information on legal requirements related to use of BMS parts.
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FlooF FlooF is offline
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Default 03-06-2020, 12:06 PM

So is it the jb4 that deactivates the turbos or the car?
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