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07-26-2018, 07:31 PM | #1 |
Scooby Newbie
Member#: 146760
Join Date: Apr 2007
Chapter/Region:
RMIC
Location: Colorado
Vehicle:2004 WRX Wagon WRB |
"Load Compensations (Manifold Pressure)" table is only 4 cells
I'm following some tuning guides (HolyCrapItsFast and Bad Noodle) which have instructed me to tune the Load Compensations. I'm using the MAF Scaling Tool which I think was created from Bad Noodle and Kodename47's spreadsheets.
I've nailed down injector latency, scale, and now MAF scale and the car's running great. But my "Load Compensations (Manifold Pressure)" table is only 4 cells while the tuning guides show more like 100 cell tables... what's the deal? Is this a 16-bit / 32-bit issue? Thanks.
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07-26-2018, 08:06 PM | #2 |
Scooby Specialist
Member#: 72829
Join Date: Oct 2004
Chapter/Region:
W. Canada
Location: Calgary, Canada
Vehicle:2006 WRX 2015 WRX |
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07-26-2018, 08:49 PM | #3 |
Scooby Newbie
Member#: 146760
Join Date: Apr 2007
Chapter/Region:
RMIC
Location: Colorado
Vehicle:2004 WRX Wagon WRB |
Damn, so no load compensation tuning for me then. Is there a workaround?
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07-27-2018, 12:11 AM | #4 |
Scooby Specialist
Member#: 72829
Join Date: Oct 2004
Chapter/Region:
W. Canada
Location: Calgary, Canada
Vehicle:2006 WRX 2015 WRX |
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07-27-2018, 02:17 AM | #5 |
Scooby Newbie
Member#: 146760
Join Date: Apr 2007
Chapter/Region:
RMIC
Location: Colorado
Vehicle:2004 WRX Wagon WRB |
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08-07-2018, 01:33 AM | #6 |
Scooby Newbie
Member#: 79339
Join Date: Jan 2005
Chapter/Region:
RMIC
Location: Westminster, CO
Vehicle:2002 EJ257 6spd WRX Midnight Black |
The load compensations aren't there because the factory didn't think it was necessary. THOUSANDS of those cars get along just fine without them. So don't worry about it.
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01-18-2019, 11:13 AM | #7 |
Scooby Newbie
Member#: 484841
Join Date: Apr 2018
Chapter/Region:
HIIC
Location: Hawaii
Vehicle:2019 WRX STI |
Related question. Under what circumstances would one even bother modifying the "Load Compensation (Manifold Pressure)" tables? Is there a reason why they aren't just zeroed out on heavily modified cars? Just trying to understand the rational behind them.
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01-18-2019, 01:01 PM | #8 | |
Scooby Specialist
Member#: 469585
Join Date: Jun 2017
Chapter/Region:
W. Canada
Vehicle:2009 STi White |
Quote:
My Load Comp tables are zeroed out because I have gone to a larger fuel rail and a parallel style fuel line setup which has, according to my logging neutralized the the issue or at least to an imperceivable level. |
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01-18-2019, 09:53 PM | #9 | |
Scooby Newbie
Member#: 484841
Join Date: Apr 2018
Chapter/Region:
HIIC
Location: Hawaii
Vehicle:2019 WRX STI |
Quote:
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01-19-2019, 02:17 AM | #10 | |
Scooby Specialist
Member#: 469585
Join Date: Jun 2017
Chapter/Region:
W. Canada
Vehicle:2009 STi White |
Quote:
The Load Comp can mess with your MAF Calibration tuning process if you're not aware of it. Before I went to a parallel setup with larger rails, I zero my compensation but did my logging in MAP / RPM regions that I knew were accurate. Once I was happy with my MAF Calibration I would rework the Load Comp tables. It was a pain in the ass, but it gave me a good result. It's so much nicer now not having to worry about it. Last edited by JSR84; 01-19-2019 at 02:25 AM. |
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