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Old 08-29-2012, 11:27 AM   #1
Scooby Newbie
Member#: 293162
Join Date: Sep 2011
Chapter/Region: MAIC
Location: Virginia
2006 Forester STi

Default Base/break in map creation

Here the story, Im building an engine since I have a burnt valve on my stock engine so since Im going to have it all apart why not make it better. Anyway, here are the mods that I am doing:

Built block- STi Nitride Crank, Manley H-beam Rods, CP stock compression forged pistons, Oem bearings on rod and crank, cobb lightweight crank pulley

Stock heads rebuilt with new valve guides etc

Tgv deletes with 8mm phenolic spacers

DW 740cc injectors with aeromotive rails and paralleled lines

Grimmspeed p&p exhaust manifold with crosspipe

38mm turbosmart ewg with 14psi spring

TEC TD06 20g turbo

Prodrive ebcs

Catless downpipe and spt catback (which will change)

Aem cai with gimmick inlet

For now Im still running the stock intercooler and bpv

I may have forgot something but I will edit it as I think about it. So what I have been doing is creating a map based off the stage 2 map from cobb which I was running prior to moding the car. I know that I need to scale the injectors remove any cels due to the missing tgv's and change wastegate duty cycles for ewg.

Im using the access tuner race software to to this btw. I know with this turbo that its gonna push more air and also do so faster than stock so Im not sure what I need to change to compensate for this. Im not trying to do a full tune just create a base map to use while i break it all in and then get it tuned.

I can upload the map I have created if anyone wants to check my work and or make suggestions.
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Last edited by Viewtiful1; 08-30-2012 at 01:23 PM.
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Old 08-29-2012, 01:48 PM   #2
Scooby Specialist
Member#: 73884
Join Date: Nov 2004
Chapter/Region: International
Location: Naples, ITALY
2005 STi
2006 Evolution MR


For a map to break-in the engine:

AVCS tables: Normal Cobb stage 2

Boost Control Tables: Normal Cobb stage 2 except:
WDC high and low: set to zero (same as connecting the turbo outlet nipple directly to the EWG actuator). You already have a 14# EWG spring, that is plenty of boost for break-in and will work fine weather you subscribe to the "soft and easy" break-in or the "drive it like you stole it" break-in or anything in between. [With WDC set to zero across the board, all other tables here do not matter and do not need to be touched]

Fuel Tables: Normal Cobb stage 2 except:
*Fuel injector latency: You should start out with the values from the injector manufacture.

*Fuel injector scale: You can calculate a starting value of 3666 or 3883 (depending on weather you take stock injector scaling of 5372 and use either 505 or 535 cc/min.

Idle control tables: Normal Cobb stage 2

Ignition tables: Normal Cobb stage 2

Launch control: Normal Cobb stage 2

Misc. Limiters: Normal Cobb stage 2

Misc. Tables: Normal Cobb stage 2

Sensor Calibrations: Normal Cobb stage 2 except:
*MAF Calibration: use the stock values since Cobb does not have an AEM map for 06's, but keep an eye on your wide-band AFR's when you are open loop and your total fuel compensation (correction and learning trims), adjust if necessary.
Inconsistent readings at a constant speed/throttle are indications of turbulence at the MAF sensor (i.e. intake is not designed very well).

*As long as you are getting consistent and repeatable MAF readings, you can make adjustments to correct for higher/lower than desired fuel learning values and/or open loop AFR's. Adjust to any/all of the following as appropriate: MAF values, Fuel injector scale value, and/or Fuel injector latency values.
MAF values are best for a specific spot/area that is not fueling the way you want.
Fuel injector scale is best to shift AFR's up or down equally across the entire load range.
Fuel injector latency is best to adjust for rich (or lean) fueling at idle/low load but lean (or rich) fueling at WOT/high load (open loop). Adjusting fuel injector latency values might require an adjustment to the fuel injector scale value, this is expected.

Throttle Tables: Normal Cobb stage 2

Other stuff:
Map scaling: Search for how-to's on adjusting map scaling. You might want to scale your maps to include (at a minimum) a load cell for 3.0 g/sec. Probably not too important since you will be limited to 14# of boost, your choice. Just be careful to do it correctly.

Advanced Parameters: uncheck as necessary.

I think that about does it, at least that is all I can think of right now.

Last edited by jebjkey; 08-29-2012 at 01:58 PM. Reason: Minor gramatical corrections
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Old 08-29-2012, 02:02 PM   #3
Scooby Newbie
Member#: 293162
Join Date: Sep 2011
Chapter/Region: MAIC
Location: Virginia
2006 Forester STi


Awesome, thanks a lot! I should have mentioned I have the Deatschwerks 740cc injectors so the latency is the same as stock.

As to map scaling I will have to search it out for I overlooked that detail.

Thanks again!
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Old 04-15-2013, 01:44 PM   #4
Scooby Newbie
Member#: 344675
Join Date: Jan 2013

Where can I download?
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Old 04-15-2013, 06:35 PM   #5
Scooby Specialist
Member#: 335445
Join Date: Oct 2012
Chapter/Region: MAIC
Location: Ashland, VA
Stg. 2 - 287whp/317wtq.


Don't resurect multiple dead threads, and certainly not for the same thing. Download from Cobb Tuning's website.
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