Yup!
Just changed to 14.63 in B3601. Went back and changed to 14.7 in B3647 and then converted to EQ...came out as 0.9951.
Changed back to AFR and it came up as 14.7004
Yup!
Just changed to 14.63 in B3601. Went back and changed to 14.7 in B3647 and then converted to EQ...came out as 0.9951.
Changed back to AFR and it came up as 14.7004
Howard
YOU ONLY NEED TWO TOOLS IN LIFE - WD-40 AND DUCT TAPE. IF IT DOESN'T
MOVE AND SHOULD, USE THE WD-40. IF IT SHOULDN'T MOVE AND DOES, USE THE
DUCT TAPE.
IF YOU CAN'T FIX IT WITH A HAMMER, YOU'VE GOT AN ELECTRICAL PROBLEM.
98 K1500 'HOLDEN' Suburban.
Custom Whipple SC, Mercruiser Marine intake, 0411 PCM, 4L80E w/shift kit
Ok, that should be good.
Here's the tune I'll load before heading home from work.
Does this B3647 look appropriate to you?
Last edited by hquick; April 28th, 2007 at 12:16 PM.
Howard
YOU ONLY NEED TWO TOOLS IN LIFE - WD-40 AND DUCT TAPE. IF IT DOESN'T
MOVE AND SHOULD, USE THE WD-40. IF IT SHOULDN'T MOVE AND DOES, USE THE
DUCT TAPE.
IF YOU CAN'T FIX IT WITH A HAMMER, YOU'VE GOT AN ELECTRICAL PROBLEM.
98 K1500 'HOLDEN' Suburban.
Custom Whipple SC, Mercruiser Marine intake, 0411 PCM, 4L80E w/shift kit
Looks good... I would richen the low rpm high map corner.
Thanks Joe...yeah, I went the wrong way before and leaned it out.
I'll edit my uploaded tune with that corner richened a bit.
Howard
YOU ONLY NEED TWO TOOLS IN LIFE - WD-40 AND DUCT TAPE. IF IT DOESN'T
MOVE AND SHOULD, USE THE WD-40. IF IT SHOULDN'T MOVE AND DOES, USE THE
DUCT TAPE.
IF YOU CAN'T FIX IT WITH A HAMMER, YOU'VE GOT AN ELECTRICAL PROBLEM.
98 K1500 'HOLDEN' Suburban.
Custom Whipple SC, Mercruiser Marine intake, 0411 PCM, 4L80E w/shift kit
I just changed the above attached tune with the B3647 table richened up in the area you suggested.
It looks unusual...is that normal?
Howard
YOU ONLY NEED TWO TOOLS IN LIFE - WD-40 AND DUCT TAPE. IF IT DOESN'T
MOVE AND SHOULD, USE THE WD-40. IF IT SHOULDN'T MOVE AND DOES, USE THE
DUCT TAPE.
IF YOU CAN'T FIX IT WITH A HAMMER, YOU'VE GOT AN ELECTRICAL PROBLEM.
98 K1500 'HOLDEN' Suburban.
Custom Whipple SC, Mercruiser Marine intake, 0411 PCM, 4L80E w/shift kit
Oh... I meant like this...
WOW! Thanks Joe.
That's....ahhhh.......different!
Howard
YOU ONLY NEED TWO TOOLS IN LIFE - WD-40 AND DUCT TAPE. IF IT DOESN'T
MOVE AND SHOULD, USE THE WD-40. IF IT SHOULDN'T MOVE AND DOES, USE THE
DUCT TAPE.
IF YOU CAN'T FIX IT WITH A HAMMER, YOU'VE GOT AN ELECTRICAL PROBLEM.
98 K1500 'HOLDEN' Suburban.
Custom Whipple SC, Mercruiser Marine intake, 0411 PCM, 4L80E w/shift kit
How many of the decimal places (precision values) does the PCM use ?
I mean if you set the values to 6 places will the PCM use those or does it ignore some ?
2005 1500 HD , Custom OS3 SD tune .
2006 Trailblazer
Dinosaurs and Plants gave their lives so that we may drive , long live fossil fuel .
The PCM stores values in some "fixed point" format.
For example, say a particular parameter is stored as a byte;
a byte can hold 256 discrete values (0-255);
say the range of this parameter is 0.000 to 9.999;
then the step between each discrete value is (9.999-0.000)/(255-0) = 0.039211764705882352941176470588235294...
and after rounding for display this looks like 0.03921;
but note that 0.03921*255 = 9.99855 which is not 9.999.
So it's not a matter of how many decimal places does the PCM use, but it's a matter of how many decimal places are used to display a real number which has discrete values, which causes the number to be displayed imprecisely.
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