Power Commander 3 and Yosh Remap.

External Since: Jan 04, 2004 Posts: 7

Hello!

I've got a question! A few months ago I had my 03 gsxr 600 ECU remapped at
my local shop with some sort of yoshimura remapping device. I just recently
installed a Power Commander 3usb. Does anyone know if there are any
conflicts or problems by doing this? My only "engine" mod is a Yosh TRS
endcan and TRE mod. I used the Yoshimura Full Exhaust and stock filter map.
When I rev the engine (in neutral) through the rev-range, the PC3 shows that
it is running perfect fueling. I'm wondering if that reading is off because
I had the ECU itself remapped. I think that maybe the engine is running
rich but is showing balanced fueling.

Thanks for any help!

External Since: Jul 27, 2003 Posts: 86

>
> I've got a question! A few months ago I had my 03 gsxr 600 ECU remapped at
> my local shop with some sort of yoshimura remapping device. I just recently
> installed a Power Commander 3usb. Does anyone know if there are any
> conflicts or problems by doing this? My only "engine" mod is a Yosh TRS
> endcan and TRE mod. I used the Yoshimura Full Exhaust and stock filter map.
> When I rev the engine (in neutral) through the rev-range, the PC3 shows that
> it is running perfect fueling. I'm wondering if that reading is off because
> I had the ECU itself remapped. I think that maybe the engine is running
> rich but is showing balanced fueling.

This is a common occurrence with mapping via Yosh after fitting an after-market can. The
free-flowing can typically causes a hole in the fuelling, a lean spot at lower revs.To overcome this
cheaply tuners use a yoshbox to richen up the fuelling, but it does it across the rev range, so that
you end up running rich where before the fuelling was right. Most people are happy with this as it
smoothes out the lower revs, at the expense of a possible slight loss of power in the upper revs.

If you are going to fit a power commander you must accompany this with some time on a dyno to
justify the expense of the PC. The Dyno tuner will make the necessary mapping adjustments to give
you a nice, linear power curve, whilst ironing out the low down gremlins.This PC map can be "laid
over" the original Yosh settings, or you can get the tuner to set the ECU back to standard with a
yosh box first, I don't think there is any benefit either way.

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