OFT - Example alternate maps for AT, 98RON, E85, MAF Scales

[Wayno]

Compare EL and UEL maps from 2.06 and you'll see which tables are different.

[jcywong]

You mean I then ignore those? That doesn't sounds right.

[Wayno]

The avcs tables are the only difference between headers and i haven't modified them.

[jcywong]

OK I see, so that means I can just copy all the tables right.
thanks so much

[akyp]

Noob in need of some help:
http://datazap.me/u/akyp/20150721-st...1&zoom=246-493

How can I get rid of the AFR fluctuation between 2200 and 3600 rpm? Looked at MAF scaling table and it's covered by all but 2 cells. Above 3600 rpm it seems good. The LTFT also seems too much.

[Wayno]

Originally Posted by akyp

Noob in need of some help:
http://datazap.me/u/akyp/20150721-st...1&zoom=246-493

How can I get rid of the AFR fluctuation between 2200 and 3600 rpm? Looked at MAF scaling table and it's covered by all but 2 cells. Above 3600 rpm it seems good. The LTFT also seems too much.

You can use some load limit tweaking. Basically when your engine goes over the load limit, the ECU will make the fuel much leaner. So if you lower the load limit in that area you should be able to get fuel into the correct ballpark while keeping the MAF scale smooth.

It looks like you have a MT with EL headers on petrol?

[akyp]

Originally Posted by Wayno

You can use some load limit tweaking. Basically when your engine goes over the load limit, the ECU will make the fuel much leaner. So if you lower the load limit in that area you should be able to get fuel into the correct ballpark while keeping the MAF scale smooth.

It looks like you have a MT with EL headers on petrol?

Thanks. Ok didn't notice the load limit tables you added until now. Will modify my XML and give that a go.

Yes MT and I have P&L Motorsports 4-1 EL catted header and on crappy 98 RON. Been using OTS Stage 2 EL maps with neutered Base Timing B for a while, and not happy at all about the power. Now with v76 A01G MAF scaling it begins to feel better.

What about the LTFT? Do I need to drive more than 20 mins (my home to where I did the WoT pulls) after flashing a new map, to give it time to settle down? Thanks again.

[Wayno]

It's not so much how long you drive, it's how much you can drive above 2.2 MAFV while staying in closed loop, as to how long it takes to learn trims

[drewbot]

@Wayno @steve99

Thanks for all the details you guys have put up on this forum. Very helpful!!!!

I have recently just flashed the v79 tables on my Stage 1 B01D A/T tune.

Took a 45 km drive to work and I think the trims have finally learned and will report back (hopefully with some decent logs)

[xsnapshot]

Wayno, would the difference in power soley be a result of the cars running leaner? On the AT car I only see a difference of 0.5* of timing.

For the E85 NA cars with full bolt ons, what kind of timing are you finding optimal? I instinctively want to add more, but on E85 I feel it would be easy to overshoot MBT. My guess is the OTS maps for E85 already run quite close to optimal timing.

[Wayno]

Which difference in power are you talking about exactly?

Don't go adding timing to e85 maps without a dyno.

[xsnapshot]

Originally Posted by Wayno

Which difference in power are you talking about exactly?

Don't go adding timing to e85 maps without a dyno.

I am talking about those recent dyno's a couple posts up for the AT car. Seems to run about 33* up top vs 32.5* for OTS mapping.

I haven't added any timing yet. I've leaned it out to about 12.5 gas equiv AFR on E85 from about 11.5 it was running with the OTS map. It feels MUCH stronger there. No knock.

I need to get some good logs. I'll do that tomorrow.

I want to make sure my head is on straight here though. Let's hypothetically take a car with only headers (rest of exhaust stock) running on E85 at a nice 12.5 AFR, at MBT timing, at say 4000 RPM. If you increase the VE by changing the entire rest of the exhaust out for a free flowing catless system, then you would need LESS timing to achieve MBT at the same RPM and AFR right?

[Wayno]

I don't know. I haven't changed the timing for e85 at WoT because shivs timing is already at mbt. I only smoothed it and modified it at cruising speeds where it's now at stoichiometric.

AT generally hit different load columns than MT and that's why the timing would be different.

[mid_life_crisis]

Where are these tables?
- Engine Load Limiter A (NOTE: TABLE AXIS IS RESCALED, AT AND MT ARE DIFFERENT)
- Engine Load Limiter B (NOTE: TABLE AXIS IS RESCALED, AT AND MT ARE DIFFERENT)