gas mileage pid

TotheNthRPM · 03-13-2007, 07:51 PM

how do i go about setting up a gas mileage 'gauge' so to speak? i know i would have to set it up in the scanner, but what formula and sensors wouldi use?

Bill@HPTuners · 03-13-2007, 08:47 PM

http://www.hptuners.com/forum/showth...ht=gas+mileage

post 17 but the whole thread looks like a good read.

soundengineer · 03-13-2007, 08:55 PM

For LS1's

Quote:

Originally Posted by Soundengineer

[SENS.20]/(([PID.6210]*0.132276)*[SENS.112]*[SENS.70]*8/(6175*(((([SENS.11]+[sens.10])/2)+273.15)/299.8167)))

this should get you MPG..and should compensate a little for fuel temperature a little bit..cause fuel weighs different amounts at different temperatures

seems to be accurate in my car...

basically its
[MPH]/(([Injector Flow Rate]*0.132276)*[InjectorPulse Width]*[RPM]*8/(6175*(((([IAT]+[ECT])/2)+273.15)/299.8167)))

with everything converted so that the units match appropriately

This is the MPG PID I figured out....or what appears to be correct

12secSS · 03-14-2007, 01:08 PM

Quote:

Originally Posted by soundengineer

This is the MPG PID I figured out....or what appears to be correct

Sadly (for me) it is very close.

soundengineer · 03-14-2007, 01:25 PM

with mine I set up a histogram...that uses just the MPG PID...then over the length of the scan it will average the instantaneous values and come up with my average MPG

heres how I set it up...

TotheNthRPM · 03-14-2007, 02:01 PM

is the injector flow rate you speak of like 42.5#/hr or would that convert to something?

im guessing my car is more similar to the ls2 set up since its the 2.0 eco. and its not exactly stock...

Bill@HPTuners · 03-14-2007, 02:10 PM

its a PID you can log on LS1's

soundengineer · 03-14-2007, 02:13 PM

Quote:

Originally Posted by TotheNthRPM

is the injector flow rate you speak of like 42.5#/hr or would that convert to something?

im guessing my car is more similar to the ls2 set up since its the 2.0 eco. and its not exactly stock...

its the actual calculated flow rate on ls1's....it changes with rpm and with MAP...its not a static vale on any vehicle

xonelith · 03-14-2007, 04:31 PM

As always, you come up with some pretty intriguing formulas. As always, us V6's are missing some stuff (or it's not even available).

In this case, my car does not have injector flow rate. Is there something that i could use in its place? Is there some way to determine injector flow rate with a formula?

Thanks,

Tim

03-13-2007, 07:51 PM	#1
TotheNthRPM Tuner Join Date: Apr 2006 Posts: 62	gas mileage pid how do i go about setting up a gas mileage 'gauge' so to speak? i know i would have to set it up in the scanner, but what formula and sensors wouldi use?

03-13-2007, 08:47 PM	#2
Bill@HPTuners HP Tuners Support (foff667) Join Date: Jun 2004 Posts: 16,974	http://www.hptuners.com/forum/showth...ht=gas+mileage post 17 but the whole thread looks like a good read. __________________
	Location: Trenton, NJ

03-14-2007, 02:10 PM	#7
Bill@HPTuners HP Tuners Support (foff667) Join Date: Jun 2004 Posts: 16,974	its a PID you can log on LS1's __________________
	Location: Trenton, NJ

03-14-2007, 04:31 PM	#9
xonelith Senior Tuner Join Date: Oct 2004 Posts: 412	As always, you come up with some pretty intriguing formulas. As always, us V6's are missing some stuff (or it's not even available). In this case, my car does not have injector flow rate. Is there something that i could use in its place? Is there some way to determine injector flow rate with a formula? Thanks, Tim __________________ All Motor 2001 GA GT1
	Location: Whitby, Ontario, CANADA

03-14-2007, 02:01 PM	#6
TotheNthRPM Tuner Join Date: Apr 2006 Posts: 62	is the injector flow rate you speak of like 42.5#/hr or would that convert to something? im guessing my car is more similar to the ls2 set up since its the 2.0 eco. and its not exactly stock...