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Old 07-31-2004, 10:23 PM   #1
ExecNav
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Member#: 30554
Join Date: Nov 2002
Chapter/Region: South East
Location: Ellijay, GA
Vehicle:
08 LGT Spec.B
01 Impreza RS-T

Default E-Manage: Base Map for RS-T

Car: 2001 Impreza 2.5RS, RC 440cc Injectors, WRX Fuel Pump, A/F, Pyro, Boost, E-Manage with both Harness', TD04, Stock Motor

Tried posting this in EM&T but no luck there. Anyone here have a similar setup want to donate their Airflow Adjustment and Ignition Timing maps? I need to write a base map and having these on hand would be a great help. Thanks.

-Brett
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Old 08-01-2004, 01:51 AM   #2
lotusTT
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http://www.rit.edu/~krb5648/current%20map.GSC

440cc injectors, wrx pump, VF30, catless 3" exhaust, map is set up for boost ranging from about 5 psi, creeping upto 10psi. Its rich in some places, and might not work perfectly, so I'd just use it to look at and then make your own map.
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Old 08-01-2004, 03:32 PM   #3
ExecNav
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01 Impreza RS-T

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A few things...

Let me try to understand this... with this particular map, 44% of fuel is being subtracted at 0tps/500rpm all the way up to 70tps/3500rpm because the increased fuel flow from the larger injectors and wrx fuel pump are enough to compensate for that little bit of boost. After the MAP voltage stops at 4.5v, at around 80 kPa/4500 the additional injection map takes over and adds 4-10% of the factory IDC all the way to 6500rpm. Okay, hopefully I have that much right... With that said, this means that fuel was actually STILL having to be SUBTRACTED at 70tps/5000rpms? I thought I understood all this, but I guess not.

Also, why does it allow positive values in the airflow adjustment map? What use would one have for that? And how does the E-Manage get relative pressure information in the additional injection map? Do I need a pressure sensor for this?

-Brett
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Old 08-01-2004, 11:01 PM   #4
lotusTT
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yes, this map requires the pressure sensor for relative pressures. You can put positive values in the airflow map if you don't have larger injectors and want to increase fuel.

That sounds about right for the map description, its kinda repetitive that it takes fuel out with the air flow adjustment and then adds it back in with the additional injection. Part of the reason for this is the air flow is using boost instead of TPS, so if there is a large boost spike at low throttle, there is still some saftey margin with extra fuel. From my experience the 440cc's are pretty big and you could probably get away without using the additional injection and only pulling out fuel. Like I said, its still a learning experience in progress so I wouldn't rely on it, but it runs pretty well on my car.
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Old 08-01-2004, 11:09 PM   #5
ExecNav
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Location: Ellijay, GA
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08 LGT Spec.B
01 Impreza RS-T

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Ok, so what if I do max out my airflow sensor, is it possible to add fuel without the pressure sensor?

-Brett
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Old 08-02-2004, 12:49 AM   #6
lotusTT
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yes, but only with the air flow adjustment map and only based on RPM vs TPS. It makes it a bit tougher to tune, because you'll have to know what TPS and RPM's give you how much boost.
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