Engine Load Comp (MP) - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Nah · 01-19-2017, 01:51 PM

Can someone explain to me what the table is and what it effects please.

Today I decided to Zero Out the engine load comp based on manifold pressure and RPM and nonetheless, I was very impressed with the results.

Downshifting, cruising, and wot was improved. AFR was good and no knock.

Keep in mind my MAF has been scaled and vvt has been changed to accomdate my header as well as some timing tweaks in the .4-.8 range.

Thank you very reading!

aagun · 01-19-2017, 03:05 PM

i think it is rpm x map x maf , not final maf calcu . but it used on the matrix

check ur FUEL TURN

Nah · 01-19-2017, 03:14 PM

Did some reading... it effects load/fueling calculations. (Obviously)

Using the VGI worksheet with the values zeroed out I'll do a test and see what the worksheet spits out at me.

Than apply those changes and see how she drives.

If anyone could explain why driveabilty improved that'd be awesome thanks.

Nah · 01-19-2017, 03:16 PM

Quote:

Originally Posted by aagun

i think it is rpm x map x maf , not final maf calcu . but it used on the matrix

check ur FUEL TURN

Fuel trims? Are good. Just could use a slight re scale due to the temperature change. But yes you're right about the axies... idk if that's the plural form of axis or not? Lol

aagun · 01-19-2017, 03:44 PM

Quote:

Originally Posted by Nah

Fuel trims? Are good. Just could use a slight re scale due to the temperature change. But yes you're right about the axies... idk if that's the plural form of axis or not? Lol

try do same logs in air signs
and compare it

maf is so complex

Kodename47 · 01-19-2017, 04:50 PM

It seems to impact in closed loop and is indeed a load compensation table based on MAP.

You change it the same way as the MAF, using fueling error.

Nah · 01-19-2017, 06:53 PM

Quote:

Originally Posted by Kodename47

It seems to impact in closed loop and is indeed a load compensation table based on MAP.

You change it the same way as the MAF, using fueling error.

Would the vgi worksheet tool be useful for this? Say I 0 out the table than do my logging. Or would it be better to apply the correction by hand

steve99 · 01-19-2017, 08:40 PM

as its map based ie pressure compensation you may not see effects of zeroing table unless the air pressure ie altitude changes

Kodename47 · 01-20-2017, 06:30 AM

Quote:

Originally Posted by Nah

Would the vgi worksheet tool be useful for this? Say I 0 out the table than do my logging. Or would it be better to apply the correction by hand

I use the log stats but I add parameters to my log file for me to be able to do this so I can play with the data. The engine load comp tab does work well though.

01-19-2017, 01:51 PM	#1
Nah Senior Member Join Date: Jan 2016 Drives: 2013 Scion Frs 6mt Location: Florida Posts: 234 Thanks: 85 Thanked 48 Times in 32 Posts Mentioned: 1 Post(s) Tagged: 2 Thread(s)	Engine Load Comp (MP) Can someone explain to me what the table is and what it effects please. Today I decided to Zero Out the engine load comp based on manifold pressure and RPM and nonetheless, I was very impressed with the results. Downshifting, cruising, and wot was improved. AFR was good and no knock. Keep in mind my MAF has been scaled and vvt has been changed to accomdate my header as well as some timing tweaks in the .4-.8 range. Thank you very reading!

01-19-2017, 04:50 PM	#6
Kodename47 Senior Member Join Date: Oct 2012 Drives: UK GT86 Location: UK Posts: 3,040 Thanks: 185 Thanked 1,632 Times in 1,113 Posts Mentioned: 156 Post(s) Tagged: 1 Thread(s)	It seems to impact in closed loop and is indeed a load compensation table based on MAP. You change it the same way as the MAF, using fueling error. __________________ .: Stealth 86 :. Abbey Motorsport/K47 Tuned Sprintex 210 Supercharger Kodename 47 DJ: Soundcloud / Instagram / Facebook

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01-19-2017, 03:05 PM	#2
aagun Senior Member Join Date: Nov 2012 Drives: 86 Location: uae Posts: 403 Thanks: 202 Thanked 67 Times in 56 Posts Mentioned: 10 Post(s) Tagged: 0 Thread(s)	i think it is rpm x map x maf , not final maf calcu . but it used on the matrix check ur FUEL TURN

01-19-2017, 03:14 PM	#3
Nah Senior Member Join Date: Jan 2016 Drives: 2013 Scion Frs 6mt Location: Florida Posts: 234 Thanks: 85 Thanked 48 Times in 32 Posts Mentioned: 1 Post(s) Tagged: 2 Thread(s)	Did some reading... it effects load/fueling calculations. (Obviously) Using the VGI worksheet with the values zeroed out I'll do a test and see what the worksheet spits out at me. Than apply those changes and see how she drives. If anyone could explain why driveabilty improved that'd be awesome thanks.

01-19-2017, 08:40 PM	#8
steve99 Banned Join Date: Dec 2013 Drives: FT86 Location: Australia Posts: 7,996 Thanks: 1,035 Thanked 4,992 Times in 2,983 Posts Mentioned: 598 Post(s) Tagged: 2 Thread(s)	as its map based ie pressure compensation you may not see effects of zeroing table unless the air pressure ie altitude changes

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