Stock ECU map question

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Aug 26, 2011 | 06:44 PM

60wt

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Cruiser

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Stock ECU map question

Just curious...Is a stock ECU fuel map the same for both front and rear cylinders......for instance a Power commander has the " basic " map ' both cyls same fuel value' then theres the advanced map....' different values for each cyl'.... for the particular intake and exhaust combo..wondering if Harley sets up the "basic" map or "advanced" map..

Aug 26, 2011 | 07:06 PM

kyleplusitunes

Road Master

Joined: May 2011

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From: Flint, MI

i know nothing about engines, and i know nothing about ECU mapping, but I assume that changing each cylinder might be used because they don't fire at the same time like they do on cars

Aug 26, 2011 | 07:36 PM

whiskyls1

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Joined: Jun 2010

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Quote:

Originally Posted by kyleplusitunes

i know nothing about engines, and i know nothing about ECU mapping, but I assume that changing each cylinder might be used because they don't fire at the same time like they do on cars

Wow!!

Aug 26, 2011 | 07:38 PM

harleytuner

Outstanding HDF Member

Joined: Mar 2009

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From: Fredericksburg, Va.

Quote:

Originally Posted by whiskyls1

Wow!!

I'm with you there.

Aug 26, 2011 | 07:41 PM

Dionicio

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Joined: Dec 2007

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From: El Paso, Texas

Quote:

Originally Posted by harleytuner

I'm with you there.

Yeah, Me too!

Aug 26, 2011 | 07:47 PM

harleytuner

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From: Fredericksburg, Va.

Quote:

Originally Posted by 60wt

Each cylinder is tuned independantly from Harley (stock). Power Commanders still uses the stock MAP (except the PC Vision), if you have your PC MAP set to all zeros, it would be running the stock MAP, any positive number in the would be adding fuel and any negative number would be taking away fuel, since both cylinders were set up (tuned) and your performance upgrades effect both cylinders, most users are safe to make adjustments in Basic mode, but the tune would be alot better if each cylinder was tuned independantly. The early versions of the Power Commander didn't have advanced mode, both cylinders were always tuned together.

Aug 26, 2011 | 07:49 PM

WVULTRA

Road Captain

Joined: Feb 2006

Posts: 739

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Quote:

Originally Posted by 60wt

Though the popular tuning devices can't display the stock ECM map, the SERT, SEPST, and TTS Mastertune replacement calibrations use a common AFR Table with individual VE's for each cylinder: