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Old Nov 22, 2010 | 02:05 AM
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Help with Ecu based boost control

Jdm Evo 8 FQ300

GM 3 bar map
Grim speed boost control solenoid (3 port)

I have dialed in my base wastegate duty cycles and have it set close to were I want it (22-23psi) through out rev range. I have BEC zeroed out and all is good

When i try to put values back into the BEC it starts pulling WGDC big time!!!

Using psi based control 96260009 dma/livemap

Have logs but not sure how to post them here
Attached Thumbnails Help with Ecu based boost control-untitled.jpg  

Last edited by philr8; Nov 22, 2010 at 02:10 AM.
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Old Nov 22, 2010 | 01:20 PM
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Check the scaling on the boost adder and on the desired boost table. Make sure the scaling are setup for the sensor your using.
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Old Nov 22, 2010 | 02:14 PM
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Boost adder is psia16 GM3barmap
desired boost is psia8 GM3barmap

Is this my problem?

also with the desired boost i cant set to higher than 22.3psi so i have to have my adder at 14.7 (my atsmospheric press) +10 (offset to get higher desired boost) =24.7

Can i set both scalings to psia16 GM3barmap to get the higher boost?

Thanks
Phil
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Old Nov 22, 2010 | 03:07 PM
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Those scalings are correct.

But your desired boost tabled should go to 24.5/.7
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Old Nov 22, 2010 | 03:12 PM
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Originally Posted by Boosted Tuning
Those scalings are correct.

But your desired boost tabled should go to 24.5/.7
do you have the correct scaling to suit
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Old Nov 22, 2010 | 03:29 PM
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Email me your ROM and .xml file and Ill check it all out. See If I can find your issue.

jay@boostedtuning.com

Also, send me one of the logs from when you had correction turned off, and one of the logs where it was turned on, and pulled WGDC big time.
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Old Nov 22, 2010 | 03:42 PM
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Just emailed you mate

Thanks heaps
Phil

Originally Posted by Boosted Tuning
Email me your ROM and .xml file and Ill check it all out. See If I can find your issue.

jay@boostedtuning.com

Also, send me one of the logs from when you had correction turned off, and one of the logs where it was turned on, and pulled WGDC big time.
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Old Nov 24, 2010 | 08:38 AM
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I would suggest unless you suffer big variations in altitude or temperature, just run on the waste gate duty. The other thing would be if you get a large over boost in 5th against the lower gears. I got really board of trying to get the error correction to do anything useful and found hardly any change in target boost. I've moved to a V7 ROM where the gear dependant control is much more helpful.
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