[Barra Phantom Knock]

1 hour ago, Puffwagon said:

Just use your stock timing map and switch off the knock sensors for a good starting point for E85 tuning. When you want to add timing you just highlight 1.0 load to max load at every rpm point and add it there. This makes it easy to remember and also is where it starts getting into boost. Start with a couple of degrees and see how that goes.

Ill give that a go now and work from there

1 hour ago, Puffwagon said:

As far as afr goes you can go plenty lean if you want. I usually aim for 0.82 to 0.84 lambda on E85 as it makes a fair bit more power there than running it at 0.8 lambda. It really depends on how you drive and the weather conditions etc. For a quick hit every now and then in the cooler months, run it leaner cos it'll be fine. Middle of summer and doing a circuit day, you'll want to have it at 0.8 or so to help it cool down. Even if you're tuning and see it go to 13:1 it'll be completely fine to stay in it to log the run, and then add a bit of fuel afterwards. You'll see it lose power on the dyno if you lean it out too much, but that is usually mid 13's so it's clear that more fuel is needed to keep things happy power wise, and also happy heat wise for the engine internals etc.

Okay cool, I'll lean it out a little and aim for 0.84, thanks for the advice!

 

5 hours ago, Roland@pcmtec said:

If you can turn the filtering off can you post an audio clip up?

I've attached the log file and the raw audio

24-05-2021 08-18-38 PM Log.zip

[Barra Phantom Knock]

The factory knock system shows knock on the SPK_ADD_LIM param but not on the SPKAD_IND_AVG param.

I'd say so, I've got the bosch knock sensor for my knockears bolted as shown in the picture attached, its probably too far down to get a good reading.

They have filtering, but it can be turned off. I'll post up a clip tonight or tomorrow.

Thanks!

[Barra Phantom Knock]

Yeah I thought it might not have been good at that timing so I stopped and asked 😁

I’ll have a look tomorrow at my knock setup, I’ll try moving the sensor and tuning it and my ears.

Thanks for the help!

Also, around the hat afr are you running? I’m running around 0.8 lambda on E85 and 98, but I’ve heard it’s okay to go a bit leaner for E85. I’ve been scared to lean it out any more so I’ve just kept it there for a bit of safety.

[Barra Phantom Knock]

Hey,

I've been tuning spark on my FGX XR6 Turbo and my knock ears are showing some sort of 'phantom knock' on E85.

I've done 2 runs, one with 0deg timing at 17 psi boost (around 2.15 on the spark load) around 5k rpm and it sounds like its knocking but I'm pretty sure its not.

What sort of timing is everyone else running around that load and rpm level, that'd help me figure out about where knock starts.

I'm just going to have to drive the car easy until I figure out what's going on.

Thanks, Dylan

[Overboosting / spiking between gear shifts]

That makes sense as to why it wasn't on my mates car, I found it on mine though.

I've just been playing around with both of those scalars and have found auF2714 'Calibrateable wastegate duty cycle when gear change is in progress' to do nothing that I can notice or see in the data logs.

On the other hand when I adjust auF3002 'Change in spark adder to waste gate duty cycle', it makes my car bounce between 0 and 1 WGDC (Images Below).

I'm not too sure if its because my car uses an injector cut mainly instead of spark retard, but that doesn't explain why it oscillates while on boost.

17.5PSI Gear Change Clip - Spark Delta.csv

[Overboosting / spiking between gear shifts]

Hey guys, I can’t find the auF2714 and the auF3002 tables/scalars on my strategy (HACCKA5).

Not sure if there’s any other tables on later falcons or not...

[Flex Fuel Desired Boost Issue]

That would be why haha.

I remember changing the units of pressure to psi before I added flex fuel to my custom os.

Thanks for the heads up!

[Flex Fuel Desired Boost Issue]

So I've been getting my car setup on flex fuel and have noticed an issue with the desired boost not matching the actual boost, causing closed loop wastegate control to lock the boost at wastegate spring pressure.

I've fiddled with it a bit and have found that around 2x desired boost (desired boost at 32psi desired boost, the datalogged boost error will reach 0psi at around 16psi boost pressure (~31psi MAP))

I'm not too sure whats going on here, maybe with the e85 tables its trying to reach the specific MAP pressure where as on 98 its trying to use the relative boost pressure?

Thanks!

[Decent lambda on idle but goes very rich when the throttle is touched]

It doesn't really show much as my LTFT and STFT are both disabled. And I don't have a O2 sensor plugged in either

Cam Timing 01.csv

[Decent lambda on idle but goes very rich when the throttle is touched]

I have a similar issue with my car and a mates car.

When I try to tune the injectors to a different fuel pressure or when I have different injectors and fuel pressure I get decent lambda on idle but goes very rich when the throttle is touched.

 

I've checked the fuel pressure and it is rock solid (using a GFB FPR), disabled closed loop fuel.

STFT, LTFT and commanded lambda is dead on 1.00. Also when I data log the the injector pulse width hardly changes (1.6667% to 1.9444% duty cycle)

 

I'm stumped at the moment, I've checked everything, gone through all the forum posts and tried everything I can think of, but I know I'm missing something.

Any help would be very greatly appreciated!

 

Video

[ZF Gear Change Cylinder Cut]

Awesome thanks for the info, I'll have a play around with it tonight and see what I can find!

[ZF Gear Change Cylinder Cut]

I was just looking into the zf gear change on my FG X, I saw this parameter (auF11992) but it looks like the description is cutoff.

I also opened up my FG NA tune I had on my old car, and found this scalar set to 2.

Does anyone have any info on what this scalar does and any of the others on this page?

Thanks!

[1.24 Release Notes]

On 9/17/2020 at 2:15 PM, Roland@pcmtec said:

MultiTune: Disable tune and fuel selection being available with the engine running when the Live Tuning scalar is set to 0 (False)

What is this live tuning you are talking about? Multi-tune or actually being able to change parameters without having to upload with the car off?

[DIY Flex Fuel Kit]

Hmm very interesting! I could design and produce a kit for this if enough people are interested.

Might make it a lot cheaper and easier for the people who know how to solder up a PCB but not how to design and program a Arduino based board!