Need an open loop fuel table!

[1fastgto]

Does anyone have a realy good open loop fuel table that I can use for a 2002 383 Stroked Camaro B3647 commanded fuel vs RPM. I am running Semi Open loop SD and really need a good table to start with doing my BEN Factors for the VE. I am not real sure where to add fuel according to load in the table and what that fuel number should be. I am currently knocking a bunch and the car is a bit sluggish so I am pretty sure it needs alot more work! Any help would be great! Thanks!

[joecar]

What is the barometric pressure (in kPa) at your location (what does MAP say at key on engine off)...?

Scantool: on PIDs tab, on SAE.MAP do rightclick->Metric.
Tunetool: set your fueling units to EQ.

B3647: set last 3 columns (starting before the column matching your baro) to EQ 1.16, set all other cells to 1.01 (to avoid SOL).
B3618: set to EQ 1.16.
B3616: below 3200 set to 65%, from 3200 and up set to 35%.
B3608, B3609: set to zero.

[ you're NA (no boost, no nitrous), right...? ]

Is your B0101 table stock...? If so then increase it by 10%.

Then do one iteration of AutoVE, apply filter, paste-multiply BEN map into B0101, view the difference (how much was it?).

Post your log/tune files (indicate which log comes from which tune).

[1fastgto]

According to my log its 97 kpa at engine off. The car is N/A. B0101 is not stock. Its been factored with a very very lean OL fuel table, thats why I have had so many issues. I have added some fuel in the cruising area but I need to start over with a better OL fuel table. As soon as I get the LM2 hooked up I will redo it. As for now I have been adding fuel according to the STFT just to get it in the ball park of 1.0! I am not positive on the KPA at key off, I will look here in a bit just to verify.

[joecar]

Ok, so your BARO is very close to 100kPa, then do this:

B3647: set last 3 columns to EQ 1.16.
B3618: set to EQ 1.16.
B3616: below 3200 set to 65%, from 3200 and up set to 35%.
B3608, B3609: set to zero.

Temporarily enable CL/LTFT, and get your Closed Loop trims to correct whichever parts of B0101 that you can (while maintaining Closed Loop), and then using eyeball/handraulic method extrapolate the trend to the upper areas of B0101.

[1fastgto]

Just installed the correct 36# injectors today aswell as set up the wide band and tune, will see how it goes! as of right now i was getting anywhere from 150 to 170 miles per tank! Thats just terible! I scalled injectors as well. Does anyone have a 36# scale so I can make sure they are right?

[joecar]

Use the spreadsheet mentioned in the first line of this thread: Calculating-Injector-Flow-rate (http://forum.efilive.com/showthread.php?4821-Calculating-Injector-Flow-rate)

Also take note the difference in IFR table if you have a MAP-referenced FPR or a non-referenced FPR.

[1fastgto]

Thanks, I have the ford 30# injectors they are 3 bar 43.5, so at 4 bar 58 the table would look like this:
lb/min
0.577360
0.580959
0.584535
0.588089
0.591622
0.595134
0.598626
0.602097
0.605548
0.608980
0.612393
0.615786
0.619161
0.622518
0.625857
0.629178
0.632481

[1fastgto]

Ok, so your BARO is very close to 100kPa, then do this:

B3647: set last 3 columns to EQ 1.16.
B3618: set to EQ 1.16.
B3616: below 3200 set to 65%, from 3200 and up set to 35%.
B3608, B3609: set to zero.

Temporarily enable CL/LTFT, and get your Closed Loop trims to correct whichever parts of B0101 that you can (while maintaining Closed Loop), and then using eyeball/handraulic method extrapolate the trend to the upper areas of B0101.

OK, heres where I am lost a bit, how do you want me to enable closed loop and correct B0101? The only thing I have ever done is BEN factor with a wideband. Lost just a bit on how to do it with CL. Also I have cats so I have the front o2 sensor before the cat pulled out and my widband in there. If I enable CL I will have to put the O2 in the front and put the wideband after the cat. Thanks!

[slows10]

Weld another bung in front of the cat. A wideband does not get installed after the cat.

[joecar]

OK, heres where I am lost a bit, how do you want me to enable closed loop and correct B0101? The only thing I have ever done is BEN factor with a wideband. Lost just a bit on how to do it with CL. Also I have cats so I have the front o2 sensor before the cat pulled out and my widband in there. If I enable CL I will have to put the O2 in the front and put the wideband after the cat. Thanks!Put wideband in front next to front NBO2, weld a new bung on as slow10 said.

Set B3801 to enable, set B4205 to stock, enable the MAF... then do the Calc.VET tutorial:

A-New-Twist-on-CALC.-VE-Table..Computing-the-Entire-VE-Table (http://forum.efilive.com/showthread.php?15236-A-New-Twist-on-CALC.-VE-Table..Computing-the-Entire-VE-Table).

[1fastgto]

Put wideband in front next to front NBO2, weld a new bung on as slow10 said.

Set B3801 to enable, set B4205 to stock, enable the MAF... then do the Calc.VET tutorial:

A-New-Twist-on-CALC.-VE-Table..Computing-the-Entire-VE-Table (http://forum.efilive.com/showthread.php?15236-A-New-Twist-on-CALC.-VE-Table..Computing-the-Entire-VE-Table).

Man I was hoping that you were not going to say weld in a bung! Damn! I just finished setting up the new twist on Cal VE and I am guessing by reading it that it calculates with the LTFT?

[joecar]

Which wideband do you have...? If you have an Innovate wideband you can get it to provide both wideband and narrow band signals from the one sensor...

[joecar]

Calc.VET uses both LTFT and wideband... you can tailor it, for example to use wideband only.

[1fastgto]

Which wideband do you have...? If you have an Innovate wideband you can get it to provide both wideband and narrow band signals from the one sensor...

I have a brand new LM-2, I am also in SDOL. I followed the new calculated twist on VE tuning and have everything set up but I would love to do it with out the LTFT or closed loop! if you can help me do that it would be great!

[joecar]

If you're running OLSD, then you need the Calc.MAFT tutorial instead, and you need to tailor it as follows:
- the SELBEN pid should be edited to be a straight copy of CALC.WO2BEN,
- the CL pid will now be ignored,
- the MAF calculation is now for info only (since you won't run from the MAF).

i.e. the Calc.MAFT tutorial degenerates to the AutoVE tutorial (with the side effect of a MAF table being calculated if you ever need it).

[ you need the calc_pids.txt file from the Calc.MAFT tutorial ]

[ the Calc.MAFT tutorial is aka "Calc.VET in reverse" ]


Please do use the units g*K/kPa and EQ in your tune, and lambda in your logging.