Where to install LC-1?

[ringram]

Yeah I recon 10% might be nicer. But 15% is for safety. You will take most of what you put in out except at low load where more is needed and higher up where it needs leaning out.

Looks about right.

Compare your timing with say an 02 camaro see if there is any timing difference in high octane.

[joecar]

OK, here's my result from the AutoVE-run ... took a nice long spin, was able to hit most of the cells on the BEN-map (based on the Backup VE) up to 6000rpm ... the NB O2 seem to be partly a bit off, but most of the KR is gone with the 15% increase on the base VE values ... anyway, most of the BEN cells are in the 0.85 area - which seems to mean that the correction of the VE table would then remove the 15% increase ...

Any comments on this data??

Garry,

This means you can richen your PE vs RPM and/or enable PE at a lower RPM; you can enable PE concurrently with AutoVE tuning in your case (you still want to get BEN's to 1.00 +/-0.02 or better).

It works easier if you post screenshots of your BEN map and chart log
(I couldn't find the right WB AFR pid so I couldn't see you BEN's).

[Garry]

Here's the BEN map ... I did the run with the backup columns, so after filtering out and removing the cells with less than 15 values, this is what I got on the more detailed MainVE overview ...

I modified based on the BEN, then smoothed out the untouched cells ... headin' out for another short testrun .. see how she feels ...

[Garry]

Looks like I'm getting there ... after the first modified tune, most of the BEN cells ended up pretty close to 1.0 ... after I filled most the cells, I did another reflash and logged the rest of the way home ... couple of low MAP values resulted in some <1.0 values, which I just reprogrammed again ...

Still have some occasional KR, though it seems to have reduced some ... any idea, or is this more or less "normal"?

[joecar]

Those BEN's are looking good.
Post a pic of these tables: B3616, B3618.

[Garry]

The motor seems to be running pretty nicely, too ... haven't had any of the hesitation in the 2500-2900 area anymore, either...

3618 is 1.0 all the way through, 3616 is:

LABELS Normal PE Mode Enable (TPS %)
RPM Value
0 64.003906
400 64.003906
800 64.003906
1200 64.003906
1600 64.003906
2000 64.003906
2400 64.003906
2800 64.003906
3200 55.000000
3600 45.000000
4000 35.996094
4400 25.996094
4800 25.996094
5200 25.996094
5600 25.996094
6000 25.996094
6400 25.996094
6800 25.996094
7200 25.996094

[joecar]

... 3618 is 1.0 all the way through...

Ok, if you have your VE table dialed in, you can now run PE;

I'm told you want to run rich at max TQ and to lean out slightly as you approach max HP or max RPM.

[Garry]

OK, so what I am doing here (trying to understand it):

- if the throttle position exceeds the 50% mark up to 3600rpm or 34% beyond 4000rpm, the fuel amount is increased according to PE curve from B3618

So, in normal driving, the AFR should stick around the desired 14.7 as adjusted through the AutoVE procedure, but when I want some additional power, the engine gets more fuel (at which point the AFR should richen)

Am I about right there?

Oh, and I guess it's also time to do the steps with the "returning to closed loop", right?

[joecar]

OK, so what I am doing here (trying to understand it):

- if the throttle position exceeds the 50% mark up to 3600rpm or 34% beyond 4000rpm, the fuel amount is increased according to PE curve from B3618

Correct, but the PCM takes whichever is the richer of the PE table B3618 and the OLFA table B3605.

So, in normal driving, the AFR should stick around the desired 14.7 as adjusted through the AutoVE procedure, but when I want some additional power, the engine gets more fuel (at which point the AFR should richen)

Am I about right there?

Almost... in normal driving in OL the PCM is using the EQ from the OLFA table (which is 1.00 in most of this area; EQ 1.00 is AFR 14.63); and when TPS hits or exceeds the PE enable curve B3616, the PCM uses the richer of PE B3618 or OLFA B3605; see pic: OLFA normal driving is flat EQ 1.0, OLFA high MAP region is red circles, PE is green circles; the second red circle is because the OLFA is richer at that MAP than the PE is at that RPM (OLFA was 1.130, PE was 1.122; I have since richened my PE curve which is shown in post 37 above).

If the VE table is correctly dialed in, then the EQ or AFR in the OLFA and PE tables will show up in the actual wideband measured EQ or AFR (i.e. actual measured AFR will equal commanded AFR, i.e. BEN will be 1.00 +/-0.02 or better).

Oh, and I guess it's also time to do the steps with the "returning to closed loop", right?

No, don't return to CL yet, you're not done yet; stay in OL for a while longer, or even forever...

[joecar]

Here's a pic from my tune of last week... follow EQ and EQ_WBO2S...