First RT Tuning Experience - OSE 12P BCLF based Camaro

[redcamaro]

The spreadsheet is good, but needs to have so much going on with formulas in it! Noticed what I think are some small bugs with the interpolation, but can make it all much easier just adjusting the ADX history tables. Attached is the ADX with adjusted columns to make it the same as the VE table.

The interpolation does have errors, I'll remove it and finish fixing them later...

Still need a spreadsheet with this ADX, cut & paste results in blank cells, and extra rows beyond 2400 RPM - so the values need to be transferred manually into the existing VE Table.

Doing that makes my VE Table graph look like this.

Just experimenting with update methods

ADX New VE Values transferred manually.GIF (31.75 KiB) Viewed 6016 times

I realise about checking for spurious values with running count and range, which I didn't do for the purpose of this excercise.

AND my sensor output is screwed - gone to fix that...

Idea of the spreadsheet is to be able to update the VE Table in a tune 'on the fly'

[redcamaro]

Doing the BLM Method for the moment - how should the Flags relating to BLM Integrator be set particularly with regard to resetting the integrator - cell change, AE, DE...?

ANd the BLM Idle cell scalars?

[darcy]

Doing the BLM Method for the moment

IMO you're just wasting your time trying to tune it via BLMs with a lazy NBO2.

It must swing back and forth between rick and lean (cross counts) in order for the ecu to generate trims (BLM).

[redcamaro]

Doing the BLM Method for the moment

IMO you're just wasting your time trying to tune it via BLMs with a lazy NBO2.

It must swing back and forth between rick and lean (cross counts) in order for the ecu to generate trims (BLM).

I need to 'unlazify' it, and we are learning how to tune... as well.

[antus]

Are you aware of the 'VE by histogram' spreadsheet in the 12p thread? https://pcmhacking.net/forums/view ... f=27&t=356
narrowband tuning is only good for cells where your targeting 14.7 AFRs. As you have the wideband, I think you would be better off using that. You should be able to just drive the car around normally for a while, aim for steady states, that is, dont plant it and launch, just coast around and accellerate slowly, and let TP5 do the averaging for you and you should get good data if your sensors are working properly. If you have any hills nearby it would be worth going there too, as you'll hit more different load points.

[redcamaro]

Are you aware of the 'VE by histogram' spreadsheet in the 12p thread? https://pcmhacking.net/forums/view ... f=27&t=356
narrowband tuning is only good for cells where your targeting 14.7 AFRs. As you have the wideband, I think you would be better off using that. You should be able to just drive the car around normally for a while, aim for steady states, that is, dont plant it and launch, just coast around and accellerate slowly, and let TP5 do the averaging for you and you should get good data if your sensors are working properly. If you have any hills nearby it would be worth going there too, as you'll hit more different load points.

I have your spreadsheet Thanks antus I'll look at it later as I've currently got a million spreadsheets open at the moment...

After all the double checking it seems the wideband needed to be calibrated, or else it was some of the wires I cut and soldered and/or plugged in and out - if not the toggle MAP switch... anyway sensors seem to be okay now.

The tune just keeps getting better and better. I tend to agree with Darcy, Holden202, and Antus (you) that Wideband tuning is definitely better than BLM tuning.

I did a comparison and I'll post those files HERE at some point... Constantly running around 14.7 AFR... except during idle, and AE and DE of course - we haven't done that yet.

Just by the way drives from the BASE tune, the wideband was much better, but probably not as precise as the BLM tune.

The trade-off appears to be the "gentle driving" aspect, AE and DE factor making fine tuning the VE very difficult with wideband, against the "precision" of BLM results/tuning.

I think we need an ADX that will only log and average wideband results that are not in AE or DE - would that work?

How can we tell from the logs whether the vehicle is in AE or DE at any given point? So we can discard, or not even retain, those samples from the log.

Then with a good spreadsheet wideband tuning would be a "snap", or combine the manual labour into the software - and let it do itself.

Better still... have an ADX, or whatever, maybe a TP5 plugin that will process those results and write them straight back to the NVRAM at certain intervals. Then maybe,.. it would reset it's data at some point and start over, constantly tuning itself by either wideband and/or BLMs.

Then! get AE and DE into the picture as well ... why not? Probably adjust spark advance too...

Sales of NVRAM would go through the sunroof.

[redcamaro]

Now that the driving is AFR is reasonable... How do we get the idle to go leaner?

I tried to adjust the Idle Fuel Params - VE coefficient but it didn't seem to make any difference at all.

BTW: Idling is between 50-60 kpA, and the Hi/Lo BLM Params - Idle Cell Learn Conditions in BLCF are 24.38 and 40 kpA - do they need to be set to where the idle MAP vacuum is reading?

[Holden202T]

all this information is in the basic tuning guide!!

[redcamaro]

all this information ...

"All this information .., WTF?"

It's a great BASIC reference to start with, because it covers many things, probably everything generally. It does not provide the specific information that I am seeking.

I've read it many times, and I am appreciative of your continued assistance, but please don't refer me yet again to your Basic Tuning Guide.

[Jayme]

mate, now you are getting out of line.... please dont assume just because you have been playing for 3 weeks that the basic tuning guide is far beneath you. you still havent mastered the concepts we try to introduce in it. post a few more posts like that and people are going to start ignoring your questions. have fun on your own.

refer back to my post a few pages back. you are still trying to over complicate things looking for obscure settings. let me spoon feed you:

change target idle AFR in : "Map A: A/F Ratio - Idle A/F Ratio vs Coolant Temperature" it flicks to that table after it detects the throttle blade is closed for a certain number of seconds and you are not moving. otherwise the ecu uses the "Map A: A/F Ratio - 20-100kPa Air Fuel ratio vs RPM and MAP"

once you tell it your target AFR, you use your wideband to get it to match your actual AFR by adjusting the VE table.