Base tune & WOT tuning

[Marco Garver]

Hi!

Im a new user w EFIlive, tried the search function but have not found what Im looking for.

I have a Corvette ZO6 2006 in my shop w 4-1 longtube headers & race cats.

Does EFIive have a tune file for this car or do I start from scratch with the file I read from the car?

I would like to do a few WOT runs on a dyno to verify spark & fuel w the new hardware.

Where do I tune WOT fuel? I usually tune Mustangs w SCT Advantage and use the MAF transfer function after base fuel table is set. Looked in the EFIlive Tune tool and is seems that I should use the VE tables but which one for wot fuel?

Should WOT ignition be tuned in the Hi/low octane spark table?

Thanks

Marco Garver

[joecar]

Hi Marco

Welcome to the forum.

You will get better results by modifying the file you read from the PCM.

First: correct the VE (B0101) and MAF (B5001) tables.
Then: set the PE (B3618) to what you desire (for loaded WOT pulls).

The MAF would be used for steady state conditions at high speed (see B0120).

WOT ignition:
first tune HO table (if it doesn't ping, choose the least timing for the same TQ);
then set the LO table sufficiently backed down from the HO (i.e. to avoid pinging).

More info:
Summary-Notes (http://forum.efilive.com/showthread.php?14188-Summary-Notes)
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)

[Taz]

Hi Guys,

The 2006 Corvette was the GM debut of the E38 ECM. That means VVE tables. Follow the VVE Adjustment Tutorial by Swingtan. Tune the VVE first, then the MAF (if used).


Regards,
Taz

[joecar]

Ah, sorry, I missed the reference to "2006" :doh:please ignore my references to LS1 specifics (I thought I read 2003, I guess I need reading glasses).

Look at Taz'z attachment, VE is in the form of virtual VE (which maps a series of poynomial coefficients to a virtual VE surface);

More info:

showthread.php?8961-E38-VVE-Setup-Guide (http://forum.efilive.com/showthread.php?8961-E38-VVE-Setup-Guide)
showthread.php?17212-How-does-this-look (http://forum.efilive.com/showthread.php?17212-How-does-this-look)


Regardless of VE form, you will still be able to correct the VE and the MAF.


The principles are the same:
- correct VE,
- correct MAF,
- dial in AFR,
- look at timing.

[Chalky]

Not sure what kind of fuel you are seeing but OL AFR 12.6:1 seems to work well maybe a little richer say 12.3, where I have mine. My car is 07 Z06 and made a bit more horsepower as high as 13:1. I just do not go there on the street or anytime for that matter.

Use B8101 for modifying VE table.

Use B3618 for wide open (OL) tuning.

Use B5101 (High Octane Table) for setting timing.

I have a couple of tunes for 07 LS7 with headers/KB II that I can send along if you are willing to send me a copy of your final tune. Let me know.

dchalk@wi.rr.com

[Marco Garver]

Not sure what kind of fuel you are seeing but OL AFR 12.6:1 seems to work well maybe a little richer say 12.3, where I have mine. My car is 07 Z06 and made a bit more horsepower as high as 13:1. I just do not go there on the street or anytime for that matter.

Use B8101 for modifying VE table.

Use B3618 for wide open (OL) tuning.

Use B5101 (High Octane Table) for setting timing.

I have a couple of tunes for 07 LS7 with headers/KB II that I can send along if you are willing to send me a copy of your final tune. Let me know.

dchalk@wi.rr.com


Hi Guys!

Thanks for the input.

Just to make sure I understand correctly.

B3618 is like a Base fuel table w desired lambda @ wot.

B8101 will alter the actual fuel injector pulswidth?

I have no problem w emailing my file once it is done.

We use regular 98oktane unleaded fuel in Sweden

Best regards

Marco Garver

[Chalky]

B3618: If MAF and VE tables are adjusted properly, this table will control final AFR. If MAF/VE tables are wrong your commanded fuel will not match your WB02. Yes to your question.

I believe that is the net outcome. If you add value to the cells in B8101, you will richen up afr in the affected cells.

98 octane? Nice.

[Marco Garver]

Hi

Did some WOT runs and tuning last night.

AFRs were really rich above 4000rpm, almost down to 11.0. Changed the B3618 table to more desireable AFRs, ended up at 12-12.3AFR above 4000rpm.

Added 2 degrees timing above 4000rpm, below this rpm engine did not respond.

This resulted in a 20hp increase.

It is a shame that I did not have a chance to test the car completely stock.

First run w stock file gave 512Hp, after tuning it was up to 531Hp.

12365


Tuning went really smooth after the info in his thread, thanks.

[Chalky]

Congrats. Nice gains. Did you try a leaner B3618 just out of curiosity?

BTW, I can't open attachment. :)

[joecar]

Can you post some logs of the dyno session.

+1 I can't open the attachment.

[Chalky]

Can you post some logs of the dyno session.

+1 I can't open the attachment.

Joe: E38 starting to capture more of your attention? :)

[joecar]

Joe: E38 starting to capture more of your attention? :)lol, every so I often I take a closer look, and then I stop in my tracks. :laugh:

[Chalky]

lol, every so I often I take a closer look, and then I stop in my tracks. :laugh:

I'll trade my knowledge for your knowledge. Straight up OK? I forgot a lot of my LS6 experiences and am very slowly getting up to date on the E38.