VTT GCs 3rd gear boost issues -
06-25-2017, 10:57 AM
Good morning,
I don't usually ask for help with logs on this thing, but after flashing the newest firmware, 3rd gear boost target is almost completely ignored. Last night while I was doing some brake-boost runs, 3rd gear boost target looks to be almost completely ignored. Even if I rolled into 3rd gear it does the same thing. 4th gear no issues.
JB4 is on latest 32_8 firmware. That is honestly the only thing changed since I've had this running with Port Meth Injection (aside from my old FSB failing and injecting meth at idle).
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.
In 3Rd my boost just continues to climb past my target. That's why I say it looks like it's ignoring it. I had my db settings perfect up until I flashed new firmware. Now this starts to happen. I know timing is crap because It can handle 21psi on my current fuel, not 25+ like it was seeing.
Why would duty bias be all jacked up after firmware upgrade? I had that dialed in perfect before. And in 4th gear it holds boost fine too.
In 3Rd my boost just continues to climb past my target. That's why I say it looks like it's ignoring it. I had my db settings perfect up until I flashed new firmware. Now this starts to happen. I know timing is crap because It can handle 21psi on my current fuel, not 25+ like it was seeing.
Why would duty bias be all jacked up after firmware upgrade? I had that dialed in perfect before. And in 4th gear it holds boost fine too.
Weird part is I was experiencing the same thing after the update. I can't view your log from my work computer to see what it's doing but mine seemed to be off on the third gear pull and back on in 4th even though DB's were dialed in. Haven't pulled logs lately, it's just strange that you mentioned this as I was experiencing a similar thing after my update.
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.
Burger Motorsports
Home of the JB4 the worlds most popular turbocharged tuning system!
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.
I did this when i first installed the turbos, its how i dialed in the duty bias in the first place. I also just did this on Todd H's(prelude) car this past weekend on his new RB Next Gens and his car did the exact same thing after dialing in duty bias and then unlocking FF again. His boost in upper rpms skyrocketed like crazy.
And as said above, 4th gear has no problems. I can post more 4th gear single gear logs and its dead on target. Go to 3rd gear, completely off.
Are you saying that you enabled FF gain after you dialed in DB's? If so, you are suppose to keep the bit disabled, even after dialing in DB's.
You sure? I don't recall Terry putting that information out
'07 E90 MT Sports Package l FBO l RB Next Gen Plus l JB4 G5 with DPT E85 BEF l N20 MAP Sensor l MMP Inlets l RB Outlets l Custom Exhaust l NLS & 2-Step l MFactory 3.46 LSD l 335is Clutch with MFactory SMFW l Walbro 450 l Direct Port Meth Injection
I was in the car and reading the logs when this happened. Seemed like it was solely related to brake boosting. I highly doubt it's duty bias related as it was perfect before these brake boost runs.
'07 E90 MT Sports Package l FBO l RB Next Gen Plus l JB4 G5 with DPT E85 BEF l N20 MAP Sensor l MMP Inlets l RB Outlets l Custom Exhaust l NLS & 2-Step l MFactory 3.46 LSD l 335is Clutch with MFactory SMFW l Walbro 450 l Direct Port Meth Injection
'07 E90 MT Sports Package l FBO l RB Next Gen Plus l JB4 G5 with DPT E85 BEF l N20 MAP Sensor l MMP Inlets l RB Outlets l Custom Exhaust l NLS & 2-Step l MFactory 3.46 LSD l 335is Clutch with MFactory SMFW l Walbro 450 l Direct Port Meth Injection
After finishing up duty bias wastegate adaption should be enabled again, unless there is some good reason you don't want to enable it.
Burger Motorsports
Home of the JB4 the worlds most popular turbocharged tuning system!
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.
So I have been doing duty bias tuning properly. And in my logs, it shows regardless of if I'm brake boosting or just rolling into the throttle, in 3rd gear, the JB4 is not holding target boost in the upper rpms. When target is 21psi, its hitting my boost failsafe of 27psi. But in 4th gear, it holds it perfectly.
My setup didn't change at all. I'm just not using meth currently because I can't get the new FSB to work.
So I have been doing duty bias tuning properly. And in my logs, it shows regardless of if I'm brake boosting or just rolling into the throttle, in 3rd gear, the JB4 is not holding target boost in the upper rpms. When target is 21psi, its hitting my boost failsafe of 27psi. But in 4th gear, it holds it perfectly.
My setup didn't change at all. I'm just not using meth currently because I can't get the new FSB to work.
So it's happening without brake boosting now too huh? Very strange. I guess just adjust duty bias and see if it helps. Just strange because it was running great before that. When I drove it that one day it felt perfect
'07 E90 MT Sports Package l FBO l RB Next Gen Plus l JB4 G5 with DPT E85 BEF l N20 MAP Sensor l MMP Inlets l RB Outlets l Custom Exhaust l NLS & 2-Step l MFactory 3.46 LSD l 335is Clutch with MFactory SMFW l Walbro 450 l Direct Port Meth Injection
So it's happening without brake boosting now too huh? Very strange. I guess just adjust duty bias and see if it helps. Just strange because it was running great before that. When I drove it that one day it felt perfect
That's what is frustrating me so much about this. I will mess with it this weekend.
I reflashed back to previous firmware, made no changes to duty bias and here is the result. This was the first 3rd gear pull in map7 after changing firmware. Aside from having to massage duty bias again, she holds target, unlike on the newest firmware.
I reflashed back to previous firmware, made no changes to duty bias and here is the result. This was the first 3rd gear pull in map7 after changing firmware. Aside from having to massage duty bias again, she holds target, unlike on the newest firmware.
Very strange because I don't think Terry made any changes to this stuff on the recent firmware updates. I'd tag him, but don't remember how
'07 E90 MT Sports Package l FBO l RB Next Gen Plus l JB4 G5 with DPT E85 BEF l N20 MAP Sensor l MMP Inlets l RB Outlets l Custom Exhaust l NLS & 2-Step l MFactory 3.46 LSD l 335is Clutch with MFactory SMFW l Walbro 450 l Direct Port Meth Injection
VTT GCs 3rd gear boost issues -
06-25-2017, 10:57 AM
Linear Mode
